基于筋腱失效分析TLP动态响应

Analysis of TLP dynamic responses under tendon breakage

对张力腿平台(tension leg platform,TLP)在不同系泊失效条件下的动态响应进行分析,采用全耦合数值工具ANSYS/AQWA建立非线性平台-筋腱模型,并提出一种模拟筋腱失效的方法。主要分析了筋腱失效时的瞬态响应,筋腱同时失效和渐进失效下的平台瞬态响应,以及筋腱失效后平台的性能变化。结果表明:首先,筋腱断裂失效会导致平台产生瞬时过冲;其次,筋腱同时失效下的瞬态响应比筋腱渐进失效的瞬态响应更显著;最后,筋腱失效后平台的性能会发生明显的变化。因此,需提前研究筋腱断裂对平台动态响应的影响,防止平台的安全性受到威胁。

The dynamic behavior of a tension leg platform(TLP)under different damaged mooring conditions was studied.The fully-coupled numerical tool ANSYS/AQWA was used to develop a nonlinear hull-tendon model,and an effective method for simulating tendon failures was proposed.The transient effects of tendon breakage,the transient responses of the platform under simultaneous and progressive tendon failures,and the performance changes of the platform after tendon failures were studied.The results show that,tendon breakage can lead to transient overshoots of the platform.The transient responses caused by simultaneous tendon failures are more significant than those by progressive tendon failures.The performance of the platform has a significant change after tendon failures.Therefore,the effects of tendon breakage on the dynamic response of the platform should be examined in advance to prevent a threat against the safety of the platform.