固定式导管架平台超常振动及减振措施试验研究

Test on Abnormal Vibration and Vibration Reduction of Fixed Offshore Jacket Platform

通过 4个 1/ 2 0的导管架平台模型试验 ,研究了直立式桩腿导管架平台在海底淘空条件下的超常振动原因及其减振方案 ,提出了结构频率降低以及导管架与桩之间的碰撞是造成该平台剧烈振动的根本原因及其相应的治理措施。

The test of four 1/20 scale models of offshore jacket platform with vertical non-grouted piles are carried out to investigate the performance of wave-induced vibration and the measure of mitigation. The conclusion is that the abnormal vibration is due to the relative oscillation between the piles and legs as well as the impacts between the pile and the leg in the case of seabed scouring. Therefore, the suggestion is put forward.