考虑冰、浪等复杂载荷工况的半潜式平台应力与运动响应特征

Stress and Motion Response Features of Semi-submersible Platform Considering Complex Load Cases with Ice and Wave Loads

从应力时程和运动时程两方面分析半潜平台在波浪载荷、海冰载荷以及冰-浪联合载荷作用下的响应特征。结果表明:虽然海冰载荷的存在具有一定程度的抑波作用,平台的振荡得到缓解,但是冰-浪联合载荷会导致平台关键节点部位所受应力幅值大幅增加,并超过海冰和波浪单独作用产生的应力之和,对半潜平台的结构安全造成较大威胁,因此在研究和设计极地海域半潜平台时应同时考虑冰、浪对平台的影响。

From stress and motion time-history response, the paper analyzes the time-history features of semi-submersible platform under the wave loads, ice loads and ice-wave combined loads. The result shows that the stress amplitude of structure key nodes increased greatly under ice-wave combined loads, and the amplitude surpassed the stress sum of ice and waves, though the ice could suppress the wave partly and platform-shock is relieved, which is a threat to the target platform. So the ice-waves combined effect should be into consideration when study and design polar deep-water semi-submersible platform.