Amir R. Nejad
Om
Projects, Job Vacancy, News & Events
Please see Marine System Dynamics and Vibration Lab (MD Lab) for latest projects, job vacancies, news and events.
Background
Dr. Nejad is the current chair of EAWE WindEurope Scientific Track Committee and co-founder and co-chair of Drivetrain Technical Committee at European Academy of Wind Energy (EAWE). He leads the Marine System Dynamics and Vibration Lab (MD Lab) at Marine Technology Department, NTNU. Dr. Nejad is also a member of ISO committee on wind turbine drivetrain health monitoring, Shock and Vibration committee at Standard Norge, and Editorial Board member of "Ocean Engineering", "Wind Energy" and "Digital Twin" journals, also Associate Editor of "Wind Energy Science" journal.
His current research interests include: Stochastic and Reliability-based Design and Operation, Dynamic Modelling, Analysis, Fault Detection and Condition Monitoring of Electro-Mechanical Systems in Marine and Offshore Renewable Applications.
Teaching
- MR8402: Reliability-based design and operation of marine machinery (PhD level course)
- TMR4330: Marine machinery design and condition monitoring (autumn semesters)
- TMR4505: Wind turbine drivetrains (part of Wind Turbine specialization course autumn semesters)
- TMR4535: Marine Mechatronics, specialization course (autumn semesters)
Awards and Honors
- Best Lecturer of the Year, 2019-2020, Dept. of Marine Technology, NTNU
- Best Lecturer of the Year, 2015-2016, Dept. of Marine Technology, NTNU
- Best Poster Award, 2016 (for the article by Ghane M., Nejad A.R., et. al), Torque Conference, Munich, Germany
- Best Scientific Content Award, 2014 (for article by Nejad A.R. et. al), EERA DeepWind Conference, Trondheim, Norway
- Nowitech Full Ph.D. Fellowship Award, 2012-2015
- Det Norske Veritas (DNV) Education Fund Award, 2009-2012
- Best Scientific Content Award, Prof. Jahanshahi Conf., Tehran University, 1997
Education
- Postdoctoral Associate, Center for Ships and Ocean Structures (CeSOS), & Center for Autonomous Marine Operations and Systems (AMOS), Dept. of Marine Technology, NTNU
- Ph.D. Marine Technology, Norwegian University of Science & Technology (PhD thesis was assessed by the committee as being within the top 10% international quality level)
- M.Sc. Subsea Engineering, Aberdeen University (with distinction)
- B.Sc. Mechanical Engineering, Tehran University (with honors)
Current Projects & Students
Please see Marine System Dynamics and Vibration Lab (MD Lab).
Misc.
Dr. Nejad's Erdös number is 4. (Amir R. Nejad-->Peter Fogh Odgaard-->Tariq Samad-->Douglas B. West-->Paul Erdös)
Publikasjoner
2022
- Dibaj, Ali; Nejad, Amir R.; Gao, Zhen. (2022) A data-driven approach for fault diagnosis of drivetrain system in a spar-type floating wind turbine based on the multi-point acceleration measurements. Journal of Physics: Conference Series (JPCS). volum 2265.
- Mehlan, Felix Christian; Nejad, Amir R.; Gao, Zhen. (2022) Digital twin based virtual sensor for online fatigue damage monitoring in offshore wind turbine drivetrains. Journal of Offshore Mechanics and Arctic Engineering. volum 144 (6).
- Mehlan, Felix Christian; Pedersen, Eilif; Nejad, Amir R.. (2022) Modelling of wind turbine gear stages for Digital Twin and real-time virtual sensing using bond graphs. Journal of Physics: Conference Series (JPCS). volum 2265 (032065).
- Nejad, Amir R.. (2022) Preface. Journal of Physics: Conference Series (JPCS). volum 2257 (1).
- Nejad, Amir R.; Keller, Jonathan; Guo, Yi; Sheng, Shawn; Polinder, Henk; Watson, Simon; Dong, Jianning; Qin, Zian; Ebrahimi, Amir; Schelenz, Ralf; Guzmán, Francisco Gutiérrez; Cornel, Daniel; Golafshan, Reza; Jacob, Georg; Blockmans, Bart; Bosmans, Jelle; Pluymers, Bert; Carroll, James; Koukoura, Sofia; Hart, Edward; McDonald, Alasdair; Natarajan, Anand; Torsvik, Jone; Khazaeli Moghadam, Farid; Daems, Pieter-Jan; Verstraeten, Timothy; Peeters, Cédric; Helsen, Jan. (2022) Wind turbine drivetrains: state-of-the-art technologies and future development trends. Wind Energy Science. volum 7.
- Tartt, Kelly Jane; Amiri, Abbas K.; Nejad, Amir R.; McDonald, A.; Carroll, J.. (2022) Development of a Vulnerability Map of Wind Turbine Power Converters. Journal of Physics: Conference Series (JPCS). volum 2265.
- van Binsbergen, Diederik; soares, marcelo nesci; Pedersen, Eilif; Nejad, Amir R.. (2022) A physics-, SCADA-based remaining useful life calculation approach for wind turbine drivetrains. Journal of Physics: Conference Series (JPCS). volum 2265.
2021
- Berge, Vegard; Helgesen, Christoffer Rene; Ivanov, Dimitar Zdravkov; Jahren, Marianne Helno; Opstad, Pauline Sundvor; Sletten, Petter Solem; Nejad, Amir R.. (2021) On State-of-the-Art and Alternative Energy-Efficient Lifting Technologies for Deep Sea Mining. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 5: Ocean Space Utilization.
- Ibrion, Mihaela; Nejad, Amir R.. (2021) On Building a Safe Ocean, The oceanscape and the necessity for developing an Ocean Culture. UN Decade of Ocean Science for Sustainable Development, SPECIAL ISSUE IN PARTNERSHIP WITH IOC-UNESCO.
- Ibrion, Mihaela; Paltrinieri, Nicola; Nejad, Amir R.. (2021) Learning from failures in cruise ship industry: The blackout of Viking Sky in Hustadvika, Norway. Engineering Failure Analysis. volum 125.
- Khazaeli Moghadam, Farid; Nejad, Amir R.. (2021) Online condition monitoring of floating wind turbines drivetrain by means of digital twin. Mechanical systems and signal processing. volum 162.
- Khazaeli Moghadam, Farid; Nejad, Amir R.. (2021) Theoretical and experimental study of wind turbine drivetrain fault diagnosis by using torsional vibrations and modal estimation. Journal of Sound and Vibration. volum 509.
- Khazaeli Moghadam, Farid; Nejad, Amir R.. (2021) Vibration-Based Condition Monitoring of Drivetrains in Large Offshore Wind Turbines in a Digital Twin Perspective. 2021. ISBN 978-82-326-6674-4.
- Khazaeli Moghadam, Farid; Rebouças, G. F. S.; Nejad, Amir R.. (2021) Digital twin modeling for predictive maintenance of gearboxes in floating offshore wind turbine drivetrains. Forschung im Ingenieurwesen. volum 85.
- Mehlan, Felix Christian; Nejad, Amir R.; Gao, Zhen. (2021) Estimation of Wind Turbine Gearbox Loads for Online Fatigue Monitoring Using Inverse Methods. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering.
- Nejad, Amir R.; Breivik, Andreas; Valavi, Mostafa. (2021) Fault Detection and Diagnosis of Induction Motor for Ship Propulsion by utilizing Electrical Signature and Finite Element Method. Norges teknisk-naturvitenskapelige universitet. 2021.
- Nejad, Amir R.; Purcell, Etienne; Mostafa, Valavi; Roman, Hudak; Benjamin, Lehmann; Francisco Gutiérrez, Guzmán; Felix, Behrendt; Angelo Mario, Bõhm; Franz, von Bock und Polach; Brendon M., Nickerson; Anriëtte, Bekker; Withold, Drazyk. (2021) Condition Monitoring of Ship Propulsion Systems: State-of-the-Art, Development Trend and Role of Digital Twin. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 7: Polar and Arctic Sciences and Technology.
- Purcell, Etienne; Nejad, Amir R.; Valavi, Mostafa; Bekker, Anriëtte. (2021) On Uncertainty Assessment of Fatigue Damage of Propulsion Shaft Under Ice Impact. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 7: Polar and Arctic Sciences and Technology.
- R. Nejad, Amir; Torsvik, Jone. (2021) Drivetrains on floating offshore wind turbines: lessons learned over the last 10 years. Forschung im Ingenieurwesen. volum 85.
- Tartt, Kelly Jane; Nejad, Amir R.; Amiri, Abbas K.; McDonald, A.. (2021) On Lifetime Extension of Wind Turbine Drivetrains. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering.
- Torsvik, Jone; Nejad, Amir R.; Pedersen, Eilif. (2021) Experimental field study of floater motion effects on a main bearing in a full-scale spar floating wind turbine. Marine Structures. volum 79.
- van Binsbergen, Diederik; Nejad, Amir R.; Helsen, Jan. (2021) Dynamic Model Development of Wind Turbine Drivetrains by Using Sensor Measurements. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering.
- Wang, Shuaishuai; Moan, Torgeir; Nejad, Amir R.. (2021) A comparative study of fully coupled and de-coupled methods on dynamic behaviour of floating wind turbine drivetrains. Renewable Energy. volum 179.
- Wang, Shuaishuai; Nejad, Amir R.; Moan, Torgeir. (2021) Design and Dynamic Analysis of a Compact 10 MW Medium Speed Gearbox for Offshore Wind Turbines. Journal of Offshore Mechanics and Arctic Engineering. volum 143 (3).
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir. (2021) A comparative study on the dynamic behaviour of 10 MW conventional and compact gearboxes for offshore wind turbines. Wind Energy. volum 24 (7).
2020
- Cho, Seongpil; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2020) Numerical modeling of the hydraulic blade pitch actuator in a spar‐type floating wind turbine considering fault conditions and their effects on global dynamic responses. Wind Energy. volum 23 (2).
- Dong, Wenbin; Rasekhi Nejad, Amir; Moan, Torgeir; Gao, Zhen. (2020) Structural reliability analysis of contact fatigue design of gears in wind turbine drivetrains. Journal of Loss Prevention in the Process Industries. volum 65.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2020) Learning from failures: Accidents of marine structures on Norwegian continental shelf over 40 years time period. Engineering Failure Analysis. volum 111.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2020) Learning from non-failure of Onagawa nuclear power station: an accident investigation over its life cycle. Results in Engineering (RINENG). volum 8.
- Khazaeli Moghadam, Farid; Rasekhi Nejad, Amir. (2020) Evaluation of PMSG-based drivetrain technologies for 10 MW floating offshore wind turbines: pros and cons in a life-cycle perspective. Wind Energy. volum 23 (7).
- Khazaeli Moghadam, Farid; Rasekhi Nejad, Amir. (2020) Natural frequency estimation by using torsional response, and applications for wind turbine drivetrain fault diagnosis. Journal of Physics: Conference Series (JPCS). volum 1618.
- Lee, Chern Fong; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir. (2020) Consequences of load mitigation control strategies for a floating wind turbine. Journal of Physics: Conference Series (JPCS). volum 1669.
- Moan, Torgeir; Gao, Zhen; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir. (2020) Recent Advances in Integrated Response Analsysis of Floating Wind Turbines in a Reliability Perspective. Journal of Offshore Mechanics and Arctic Engineering. volum 142 (5).
- Rasekhi Nejad, Amir. (2020) Life Prediction and Health Monitoring of Marine Propulsion System under Ice Impact (HealthProp).
- Rebouças, G. F. S.; Rasekhi Nejad, Amir. (2020) On Down-Scaled Modelling of Wind Turbine Drivetrains. Journal of Physics: Conference Series (JPCS). volum 1618 (5).
- van Binsbergen, Dirk Willem; Wang, Shuaishuai; Rasekhi Nejad, Amir. (2020) Effects of induction and wake steering control on power and drivetrain responses for 10 MW floating wind turbines in a wind farm. Journal of Physics: Conference Series (JPCS). volum 1618.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir. (2020) Effects of bedplate flexibility on drivetrain dynamics: Case study of a 10 MW spar type floating wind turbine. Renewable Energy. volum 161.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2020) Dynamic Behaviour Comparison of a 10-MW Drivetrain in a Bottom-Fixed Monopile and a Spar Floating Wind Turbines. Proceedings of the Thirtieth (2020) International Ocean and Polar Engineering Conference Shanghai, China, October 11-16, 2020.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2020) On design, modelling, and analysis of a 10‐MW medium‐speed drivetrain for offshore wind turbines. Wind Energy. volum 23 (4).
2019
- Balestra, Lorenzo; Rasekhi Nejad, Amir; Naldi, Giovanni. (2019) On Design and Analysis of a Drivetrain Test Rig for Wind Turbine Health Monitoring. ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. Volume 10: Ocean Renewable Energy.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2019) On Disaster Risk Reduction in Norwegian Oil and Gas Industry Through Life-Cycle Perspective. ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Structures, Safety, and Reliability.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2019) On risk of digital twin implementation in marine industry: Learning from aviation industry. Journal of Physics: Conference Series (JPCS). volum 1357 (1).
- Johansen, Sigrid S.; Rasekhi Nejad, Amir. (2019) On Digital Twin Condition Monitoring Approach for Drivetrains in Marine Applications. ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. Volume 10: Ocean Renewable Energy.
- Khazaeli Moghadam, Farid; Rasekhi Nejad, Amir. (2019) Experimental Validation of Angular Velocity Measurements for Wind Turbines Drivetrain Condition Monitoring. ASME 2019 2nd International Offshore Wind Technical Conference.
- Rasekhi Nejad, Amir; Aoyanagi, Yuriko; Ibrion, Mihaela. (2019) Team and Research Based Learning Methods Applied in Multidisciplinary Marine Engineering Education. Journal of Physics: Conference Series (JPCS). volum 1357 (1).
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir. (2019) Effect of axial acceleration on drivetrain responses in a spar-type floating wind turbine. Journal of Offshore Mechanics and Arctic Engineering. volum 141 (3).
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2019) Design and Dynamic Analysis of a Compact 10 MW Medium Speed Gearbox for Offshore Wind Turbines. ASME 2019 2nd International Offshore Wind Technical Conference.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2019) On initial design and modelling of a 10 MW medium speed drivetrain for offshore wind turbines. Journal of Physics: Conference Series (JPCS). volum 1356:012024.
2018
- Ghane, Mahdi; Nejad, Amir Rasekhi; Blanke, Mogens; Gao, Zhen; Moan, Torgeir. (2018) Condition monitoring of spar‐type floating wind turbine drivetrain using statistical fault diagnosis. Wind Energy. volum 21 (7).
- Moan, Torgeir; Nejad, Amir Rasekhi. (2018) Proceedings of the 3rd Offshore Structural Reliability Conference (OSRC2016). 2018. ISBN 978-82-691120-0-9.
- Nejad, Amir Rasekhi. (2018) Modelling and Analysis of Drivetrains in Offshore Wind Turbines. Offshore Wind energy technology.
- Nejad, Amir Rasekhi; Odgaard, Peter Fogh; Moan, Torgeir. (2018) Conceptual study of a gearbox fault detection method applied on a 5‐MW spar‐type floating wind turbine. Wind Energy. volum 21 (11).
- Rasekhi Nejad, Amir; Li, Lin; Guachamin Acero, Wilson Ivan; Moan, Torgeir. (2018) A Systematic Design Approach of Gripper’s Hydraulic System Utilized in Offshore Wind Turbine Monopile Installation. ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering - Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering.
- Torsvik, Jone; Nejad, Amir Rasekhi; Pedersen, Eilif. (2018) Main bearings in large offshore wind turbines: development trends, design and analysis requirements. Journal of Physics: Conference Series (JPCS). volum 1037 (4).
2017
- Ghane, Mahdi; Nejad, Amir Rasekhi; Blanke, Mogens; Gao, Zhen; Moan, Torgeir. (2017) Diagnostic monitoring of drivetrain in a 5 MW spar-type floating wind turbine using Hilbert spectral analysis. Energy Procedia. volum 137.
- Nejad, Amir Rasekhi; Bachynski, Erin Elizabeth; Moan, Torgeir. (2017) On Tower Top Axial Acceleration and Drivetrain Responses in a Spar-Type Floating Wind Turbine. ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium.
- Rasekhi Nejad, Amir; Moan, Torgeir. (2017) On model-based system approach for health monitoring of drivetrains in floating wind turbines. Procedia Engineering. volum 199.
2016
- Ghane, Mahdi; Rasekhi Nejad, Amir; Blanke, Mogens; Gao, Zhen; Moan, Torgeir. (2016) Statistical fault diagnosis of wind turbine drivetrain applied to a 5MW floating wind turbine. Journal of Physics: Conference Series (JPCS). volum 753.
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Li, Lin; Moan, Torgeir. (2016) Correlation between Acceleration and Drivetrain Load Effects for Monopile Offshore Wind Turbines. Energy Procedia. volum 94.
- Rasekhi Nejad, Amir; Guo, Yi; Gao, Zhen; Moan, Torgeir. (2016) Development of a 5 MW reference gearbox for offshore wind turbines. Wind Energy. volum 19 (6).
- Rasekhi Nejad, Amir; Jiang, Zhiyu; Gao, Zhen; Moan, Torgeir. (2016) Drivetrain load effects in a 5-MW bottom-fixed wind turbine under blade-pitch fault condition and emergency shutdown. Journal of Physics: Conference Series (JPCS). volum 753 (11).
2015
- Guo, Yi; Keller, Jonathan; LaCava, William; Austin, Jason; Rasekhi Nejad, Amir; Halse, Chris; Bastard, Loic; Helsen, Jan. (2015) Recommendations on Model Fidelity for Wind Turbine Gearbox Simulations. 2015.
- Rasekhi Nejad, Amir. (2015) Dynamic analysis and design of gearboxes in offshore wind turbines in a structural reliability perspective. Norges teknisk-naturvitenskapelige universitet. 2015. ISBN 978-82-326-1038-9. Doktoravhandlinger ved NTNU (191).
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Gao, Zhen; Moan, Torgeir. (2015) Fatigue Damage Comparison of Mechanical Components in a Land-based and a Spar Floating Wind Turbine. Procedia Engineering. volum 101 (C).
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Kvittem, Marit Irene; Luan, Chenyu; Gao, Zhen; Moan, Torgeir. (2015) Stochastic dynamic load effect and fatigue damage analysis of drivetrains in land-based and TLP, spar and semi-submersible floating wind turbines. Marine Structures. volum 42.
- Rasekhi Nejad, Amir; Xing, Yihan; Guo, Yi; Keller, Jonathan; Gao, Zhen; Moan, Torgeir. (2015) Effects of floating sun gear in a wind turbine’s planetary gearbox with geometrical imperfections. Wind Energy. volum 18 (12).
2014
- Odgaard, Peter Fogh; Rasekhi Nejad, Amir. (2014) Frequency based Wind Turbine Gearbox Fault Detection applied to a 750 kW Wind Turbine. Proceedings of the IEEE Conference on Control Applications.
- Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2014) Fatigue Reliability-Based Inspection and Maintenance Planning of Gearbox Components in Wind Turbine Drivetrains. Energy Procedia. volum 53.
- Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2014) On long-term fatigue damage and reliability analysis of gears under wind loads in offshore wind turbine drivetrains. International Journal of Fatigue. volum 61.
- Rasekhi Nejad, Amir; Odgaard, Peter Fogh; Gao, Zhen; Moan, Torgeir. (2014) A prognostic method for fault detection in wind turbine drivetrains. Engineering Failure Analysis. volum 42.
2013
- Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2013) Long-term Analysis of Gear Loads in Fixed Offshore Wind Turbines Considering Ultimate Operational Loadings. Energy Procedia. volum 35.
2012
- Nejad, Amir R; Xing, Yihan; Moan, Torgeir. (2012) Gear Train Internal Dynamics in Large Offshore Wind Turbines. 2012 Proceedings of the ASME 11th Biennial Conference on Engineering Systems Design and Analysis (ESDA2012)-Volume 3.
Tidsskriftspublikasjoner
- Dibaj, Ali; Nejad, Amir R.; Gao, Zhen. (2022) A data-driven approach for fault diagnosis of drivetrain system in a spar-type floating wind turbine based on the multi-point acceleration measurements. Journal of Physics: Conference Series (JPCS). volum 2265.
- Mehlan, Felix Christian; Nejad, Amir R.; Gao, Zhen. (2022) Digital twin based virtual sensor for online fatigue damage monitoring in offshore wind turbine drivetrains. Journal of Offshore Mechanics and Arctic Engineering. volum 144 (6).
- Mehlan, Felix Christian; Pedersen, Eilif; Nejad, Amir R.. (2022) Modelling of wind turbine gear stages for Digital Twin and real-time virtual sensing using bond graphs. Journal of Physics: Conference Series (JPCS). volum 2265 (032065).
- Nejad, Amir R.. (2022) Preface. Journal of Physics: Conference Series (JPCS). volum 2257 (1).
- Nejad, Amir R.; Keller, Jonathan; Guo, Yi; Sheng, Shawn; Polinder, Henk; Watson, Simon; Dong, Jianning; Qin, Zian; Ebrahimi, Amir; Schelenz, Ralf; Guzmán, Francisco Gutiérrez; Cornel, Daniel; Golafshan, Reza; Jacob, Georg; Blockmans, Bart; Bosmans, Jelle; Pluymers, Bert; Carroll, James; Koukoura, Sofia; Hart, Edward; McDonald, Alasdair; Natarajan, Anand; Torsvik, Jone; Khazaeli Moghadam, Farid; Daems, Pieter-Jan; Verstraeten, Timothy; Peeters, Cédric; Helsen, Jan. (2022) Wind turbine drivetrains: state-of-the-art technologies and future development trends. Wind Energy Science. volum 7.
- Tartt, Kelly Jane; Amiri, Abbas K.; Nejad, Amir R.; McDonald, A.; Carroll, J.. (2022) Development of a Vulnerability Map of Wind Turbine Power Converters. Journal of Physics: Conference Series (JPCS). volum 2265.
- van Binsbergen, Diederik; soares, marcelo nesci; Pedersen, Eilif; Nejad, Amir R.. (2022) A physics-, SCADA-based remaining useful life calculation approach for wind turbine drivetrains. Journal of Physics: Conference Series (JPCS). volum 2265.
- Ibrion, Mihaela; Paltrinieri, Nicola; Nejad, Amir R.. (2021) Learning from failures in cruise ship industry: The blackout of Viking Sky in Hustadvika, Norway. Engineering Failure Analysis. volum 125.
- Khazaeli Moghadam, Farid; Nejad, Amir R.. (2021) Online condition monitoring of floating wind turbines drivetrain by means of digital twin. Mechanical systems and signal processing. volum 162.
- Khazaeli Moghadam, Farid; Nejad, Amir R.. (2021) Theoretical and experimental study of wind turbine drivetrain fault diagnosis by using torsional vibrations and modal estimation. Journal of Sound and Vibration. volum 509.
- Khazaeli Moghadam, Farid; Rebouças, G. F. S.; Nejad, Amir R.. (2021) Digital twin modeling for predictive maintenance of gearboxes in floating offshore wind turbine drivetrains. Forschung im Ingenieurwesen. volum 85.
- R. Nejad, Amir; Torsvik, Jone. (2021) Drivetrains on floating offshore wind turbines: lessons learned over the last 10 years. Forschung im Ingenieurwesen. volum 85.
- Torsvik, Jone; Nejad, Amir R.; Pedersen, Eilif. (2021) Experimental field study of floater motion effects on a main bearing in a full-scale spar floating wind turbine. Marine Structures. volum 79.
- Wang, Shuaishuai; Moan, Torgeir; Nejad, Amir R.. (2021) A comparative study of fully coupled and de-coupled methods on dynamic behaviour of floating wind turbine drivetrains. Renewable Energy. volum 179.
- Wang, Shuaishuai; Nejad, Amir R.; Moan, Torgeir. (2021) Design and Dynamic Analysis of a Compact 10 MW Medium Speed Gearbox for Offshore Wind Turbines. Journal of Offshore Mechanics and Arctic Engineering. volum 143 (3).
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir. (2021) A comparative study on the dynamic behaviour of 10 MW conventional and compact gearboxes for offshore wind turbines. Wind Energy. volum 24 (7).
- Cho, Seongpil; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2020) Numerical modeling of the hydraulic blade pitch actuator in a spar‐type floating wind turbine considering fault conditions and their effects on global dynamic responses. Wind Energy. volum 23 (2).
- Dong, Wenbin; Rasekhi Nejad, Amir; Moan, Torgeir; Gao, Zhen. (2020) Structural reliability analysis of contact fatigue design of gears in wind turbine drivetrains. Journal of Loss Prevention in the Process Industries. volum 65.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2020) Learning from failures: Accidents of marine structures on Norwegian continental shelf over 40 years time period. Engineering Failure Analysis. volum 111.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2020) Learning from non-failure of Onagawa nuclear power station: an accident investigation over its life cycle. Results in Engineering (RINENG). volum 8.
- Khazaeli Moghadam, Farid; Rasekhi Nejad, Amir. (2020) Evaluation of PMSG-based drivetrain technologies for 10 MW floating offshore wind turbines: pros and cons in a life-cycle perspective. Wind Energy. volum 23 (7).
- Khazaeli Moghadam, Farid; Rasekhi Nejad, Amir. (2020) Natural frequency estimation by using torsional response, and applications for wind turbine drivetrain fault diagnosis. Journal of Physics: Conference Series (JPCS). volum 1618.
- Lee, Chern Fong; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir. (2020) Consequences of load mitigation control strategies for a floating wind turbine. Journal of Physics: Conference Series (JPCS). volum 1669.
- Moan, Torgeir; Gao, Zhen; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir. (2020) Recent Advances in Integrated Response Analsysis of Floating Wind Turbines in a Reliability Perspective. Journal of Offshore Mechanics and Arctic Engineering. volum 142 (5).
- Rebouças, G. F. S.; Rasekhi Nejad, Amir. (2020) On Down-Scaled Modelling of Wind Turbine Drivetrains. Journal of Physics: Conference Series (JPCS). volum 1618 (5).
- van Binsbergen, Dirk Willem; Wang, Shuaishuai; Rasekhi Nejad, Amir. (2020) Effects of induction and wake steering control on power and drivetrain responses for 10 MW floating wind turbines in a wind farm. Journal of Physics: Conference Series (JPCS). volum 1618.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir. (2020) Effects of bedplate flexibility on drivetrain dynamics: Case study of a 10 MW spar type floating wind turbine. Renewable Energy. volum 161.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2020) On design, modelling, and analysis of a 10‐MW medium‐speed drivetrain for offshore wind turbines. Wind Energy. volum 23 (4).
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2019) On risk of digital twin implementation in marine industry: Learning from aviation industry. Journal of Physics: Conference Series (JPCS). volum 1357 (1).
- Rasekhi Nejad, Amir; Aoyanagi, Yuriko; Ibrion, Mihaela. (2019) Team and Research Based Learning Methods Applied in Multidisciplinary Marine Engineering Education. Journal of Physics: Conference Series (JPCS). volum 1357 (1).
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir. (2019) Effect of axial acceleration on drivetrain responses in a spar-type floating wind turbine. Journal of Offshore Mechanics and Arctic Engineering. volum 141 (3).
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2019) On initial design and modelling of a 10 MW medium speed drivetrain for offshore wind turbines. Journal of Physics: Conference Series (JPCS). volum 1356:012024.
- Ghane, Mahdi; Nejad, Amir Rasekhi; Blanke, Mogens; Gao, Zhen; Moan, Torgeir. (2018) Condition monitoring of spar‐type floating wind turbine drivetrain using statistical fault diagnosis. Wind Energy. volum 21 (7).
- Nejad, Amir Rasekhi; Odgaard, Peter Fogh; Moan, Torgeir. (2018) Conceptual study of a gearbox fault detection method applied on a 5‐MW spar‐type floating wind turbine. Wind Energy. volum 21 (11).
- Torsvik, Jone; Nejad, Amir Rasekhi; Pedersen, Eilif. (2018) Main bearings in large offshore wind turbines: development trends, design and analysis requirements. Journal of Physics: Conference Series (JPCS). volum 1037 (4).
- Ghane, Mahdi; Nejad, Amir Rasekhi; Blanke, Mogens; Gao, Zhen; Moan, Torgeir. (2017) Diagnostic monitoring of drivetrain in a 5 MW spar-type floating wind turbine using Hilbert spectral analysis. Energy Procedia. volum 137.
- Rasekhi Nejad, Amir; Moan, Torgeir. (2017) On model-based system approach for health monitoring of drivetrains in floating wind turbines. Procedia Engineering. volum 199.
- Ghane, Mahdi; Rasekhi Nejad, Amir; Blanke, Mogens; Gao, Zhen; Moan, Torgeir. (2016) Statistical fault diagnosis of wind turbine drivetrain applied to a 5MW floating wind turbine. Journal of Physics: Conference Series (JPCS). volum 753.
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Li, Lin; Moan, Torgeir. (2016) Correlation between Acceleration and Drivetrain Load Effects for Monopile Offshore Wind Turbines. Energy Procedia. volum 94.
- Rasekhi Nejad, Amir; Guo, Yi; Gao, Zhen; Moan, Torgeir. (2016) Development of a 5 MW reference gearbox for offshore wind turbines. Wind Energy. volum 19 (6).
- Rasekhi Nejad, Amir; Jiang, Zhiyu; Gao, Zhen; Moan, Torgeir. (2016) Drivetrain load effects in a 5-MW bottom-fixed wind turbine under blade-pitch fault condition and emergency shutdown. Journal of Physics: Conference Series (JPCS). volum 753 (11).
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Gao, Zhen; Moan, Torgeir. (2015) Fatigue Damage Comparison of Mechanical Components in a Land-based and a Spar Floating Wind Turbine. Procedia Engineering. volum 101 (C).
- Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Kvittem, Marit Irene; Luan, Chenyu; Gao, Zhen; Moan, Torgeir. (2015) Stochastic dynamic load effect and fatigue damage analysis of drivetrains in land-based and TLP, spar and semi-submersible floating wind turbines. Marine Structures. volum 42.
- Rasekhi Nejad, Amir; Xing, Yihan; Guo, Yi; Keller, Jonathan; Gao, Zhen; Moan, Torgeir. (2015) Effects of floating sun gear in a wind turbine’s planetary gearbox with geometrical imperfections. Wind Energy. volum 18 (12).
- Odgaard, Peter Fogh; Rasekhi Nejad, Amir. (2014) Frequency based Wind Turbine Gearbox Fault Detection applied to a 750 kW Wind Turbine. Proceedings of the IEEE Conference on Control Applications.
- Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2014) Fatigue Reliability-Based Inspection and Maintenance Planning of Gearbox Components in Wind Turbine Drivetrains. Energy Procedia. volum 53.
- Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2014) On long-term fatigue damage and reliability analysis of gears under wind loads in offshore wind turbine drivetrains. International Journal of Fatigue. volum 61.
- Rasekhi Nejad, Amir; Odgaard, Peter Fogh; Gao, Zhen; Moan, Torgeir. (2014) A prognostic method for fault detection in wind turbine drivetrains. Engineering Failure Analysis. volum 42.
- Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir. (2013) Long-term Analysis of Gear Loads in Fixed Offshore Wind Turbines Considering Ultimate Operational Loadings. Energy Procedia. volum 35.
Rapport/avhandling
- Khazaeli Moghadam, Farid; Nejad, Amir R.. (2021) Vibration-Based Condition Monitoring of Drivetrains in Large Offshore Wind Turbines in a Digital Twin Perspective. 2021. ISBN 978-82-326-6674-4.
- Nejad, Amir R.; Breivik, Andreas; Valavi, Mostafa. (2021) Fault Detection and Diagnosis of Induction Motor for Ship Propulsion by utilizing Electrical Signature and Finite Element Method. Norges teknisk-naturvitenskapelige universitet. 2021.
- Guo, Yi; Keller, Jonathan; LaCava, William; Austin, Jason; Rasekhi Nejad, Amir; Halse, Chris; Bastard, Loic; Helsen, Jan. (2015) Recommendations on Model Fidelity for Wind Turbine Gearbox Simulations. 2015.
- Rasekhi Nejad, Amir. (2015) Dynamic analysis and design of gearboxes in offshore wind turbines in a structural reliability perspective. Norges teknisk-naturvitenskapelige universitet. 2015. ISBN 978-82-326-1038-9. Doktoravhandlinger ved NTNU (191).
INFORMASJONSMATR
- Rasekhi Nejad, Amir. (2020) Life Prediction and Health Monitoring of Marine Propulsion System under Ice Impact (HealthProp).
Del av bok/rapport
- Berge, Vegard; Helgesen, Christoffer Rene; Ivanov, Dimitar Zdravkov; Jahren, Marianne Helno; Opstad, Pauline Sundvor; Sletten, Petter Solem; Nejad, Amir R.. (2021) On State-of-the-Art and Alternative Energy-Efficient Lifting Technologies for Deep Sea Mining. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 5: Ocean Space Utilization.
- Ibrion, Mihaela; Nejad, Amir R.. (2021) On Building a Safe Ocean, The oceanscape and the necessity for developing an Ocean Culture. UN Decade of Ocean Science for Sustainable Development, SPECIAL ISSUE IN PARTNERSHIP WITH IOC-UNESCO.
- Mehlan, Felix Christian; Nejad, Amir R.; Gao, Zhen. (2021) Estimation of Wind Turbine Gearbox Loads for Online Fatigue Monitoring Using Inverse Methods. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering.
- Nejad, Amir R.; Purcell, Etienne; Mostafa, Valavi; Roman, Hudak; Benjamin, Lehmann; Francisco Gutiérrez, Guzmán; Felix, Behrendt; Angelo Mario, Bõhm; Franz, von Bock und Polach; Brendon M., Nickerson; Anriëtte, Bekker; Withold, Drazyk. (2021) Condition Monitoring of Ship Propulsion Systems: State-of-the-Art, Development Trend and Role of Digital Twin. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 7: Polar and Arctic Sciences and Technology.
- Purcell, Etienne; Nejad, Amir R.; Valavi, Mostafa; Bekker, Anriëtte. (2021) On Uncertainty Assessment of Fatigue Damage of Propulsion Shaft Under Ice Impact. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering Volume 7: Polar and Arctic Sciences and Technology.
- Tartt, Kelly Jane; Nejad, Amir R.; Amiri, Abbas K.; McDonald, A.. (2021) On Lifetime Extension of Wind Turbine Drivetrains. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering.
- van Binsbergen, Diederik; Nejad, Amir R.; Helsen, Jan. (2021) Dynamic Model Development of Wind Turbine Drivetrains by Using Sensor Measurements. ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2020) Dynamic Behaviour Comparison of a 10-MW Drivetrain in a Bottom-Fixed Monopile and a Spar Floating Wind Turbines. Proceedings of the Thirtieth (2020) International Ocean and Polar Engineering Conference Shanghai, China, October 11-16, 2020.
- Balestra, Lorenzo; Rasekhi Nejad, Amir; Naldi, Giovanni. (2019) On Design and Analysis of a Drivetrain Test Rig for Wind Turbine Health Monitoring. ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. Volume 10: Ocean Renewable Energy.
- Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir. (2019) On Disaster Risk Reduction in Norwegian Oil and Gas Industry Through Life-Cycle Perspective. ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Structures, Safety, and Reliability.
- Johansen, Sigrid S.; Rasekhi Nejad, Amir. (2019) On Digital Twin Condition Monitoring Approach for Drivetrains in Marine Applications. ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. Volume 10: Ocean Renewable Energy.
- Khazaeli Moghadam, Farid; Rasekhi Nejad, Amir. (2019) Experimental Validation of Angular Velocity Measurements for Wind Turbines Drivetrain Condition Monitoring. ASME 2019 2nd International Offshore Wind Technical Conference.
- Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir. (2019) Design and Dynamic Analysis of a Compact 10 MW Medium Speed Gearbox for Offshore Wind Turbines. ASME 2019 2nd International Offshore Wind Technical Conference.
- Nejad, Amir Rasekhi. (2018) Modelling and Analysis of Drivetrains in Offshore Wind Turbines. Offshore Wind energy technology.
- Rasekhi Nejad, Amir; Li, Lin; Guachamin Acero, Wilson Ivan; Moan, Torgeir. (2018) A Systematic Design Approach of Gripper’s Hydraulic System Utilized in Offshore Wind Turbine Monopile Installation. ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering - Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering.
- Nejad, Amir Rasekhi; Bachynski, Erin Elizabeth; Moan, Torgeir. (2017) On Tower Top Axial Acceleration and Drivetrain Responses in a Spar-Type Floating Wind Turbine. ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium.
- Nejad, Amir R; Xing, Yihan; Moan, Torgeir. (2012) Gear Train Internal Dynamics in Large Offshore Wind Turbines. 2012 Proceedings of the ASME 11th Biennial Conference on Engineering Systems Design and Analysis (ESDA2012)-Volume 3.
Bøker
- Moan, Torgeir; Nejad, Amir Rasekhi. (2018) Proceedings of the 3rd Offshore Structural Reliability Conference (OSRC2016). 2018. ISBN 978-82-691120-0-9.
Undervisning
Emner
- TMR4535 - Marint maskineri, fordypningsemne
- MR8402 - Pålitelighetsbasert design og drift av marint maskineri
- TMR5950 - Vindturbinenergi - Offshorekonstruksjoner, masteroppgave
- HAV6001 - Dynamisk konstruksjonsanalyse og design av offshore vindturbiner
- TMR4330 - Marint maskineri - Design og tilstandskontroll
- TMR4530 - Marint maskineri, fordypningsprosjekt
- TMR4590 - Vindturbin energi - Offshore konstruksjoner, fordypningsprosjekt
Formidling
2021
- Nejad, Amir R.. (2021) Viking Sky blackout highlights safety potential of digital twin. null [Fagblad]. 2021-06-01.
- Nejad, Amir R.; Ibrion, Mihaela. (2021) A Need for Interdisciplinary Education in Ocean Fields. ECO Magazine [Fagblad]. 2021-08-10.