Page 24 - Annual Report 2012 - SAMCoT

24 SAMCoT • Annual report 2012
Knowledge on the coupled behaviour of ice and the im­
pacted structure is required to accomplish a damage-
tolerant design.
Doctoral students Ekaterina Kim and Martin Storheim
performed laboratory experiments on simultaneous
deformations of ice and a structure to learn more about
mechanisms of ice/structure interaction during a colli­
sion. These laboratory experiments were conducted at a
scale approaching a full-scale ice impact scenario; labo­
ratory-grown granular freshwater ice was used together
with steel models of sizes that could produce a realistic
damage as in full-scale interaction. The tests were con­
ducted using structures of varying rigidity and several
different ice masses. The focus was on ice features that
are sufficiently large to represent a threat to a vessel or
an offshore structure and that are appropriately small to
escape a detection and management system.
Fig. 16. a) – ice structure; b) – ice damage zone; c) – sequence of images extracted from high-speed video recordings
showing a typical impact test.
a)
b)
c)