Abstract：he integer safety of offshore installations would be endangered when collision between the installations and vessels happens. Even if serious local damage caused by the collision only, repairing would lead to work break and economical losses. Comparing with jackets, jack-ups are much more flexible and have a much lower degree of redundancy, but its collision danger has not been paid sufficient attention.. So there is few research on this subject in our country Based on non-liner dynamic analysis methods, taking a 300ft jack-up as an example, one approach of analyzing collision process between jack-up and vessel considering the initial state of the jack-up and residual strength is put forwarded. Furthermore, the influence of impact parameters on structure damage and dynamic response is considered. The conclusion may be helpful to structure design against accidental loads for jack-ups.
2012, Vol. 31 
