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首页> 外文期刊>Ocean Engineering >Shakedown Limit Of Elastic-plastic Offshore Structures Under Cyclic Wave Loading
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Shakedown Limit Of Elastic-plastic Offshore Structures Under Cyclic Wave Loading

机译:周期性波浪载荷作用下的弹塑性海洋结构的极限极限

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摘要

This paper uses theorem of shakedown to assess the shakedown limit of elastic-plastic offshore structures. For this aim, an envelope of elastic response of the structure to cyclic loading cases is required. The shakedown limit is basically a valid collapse mechanism and can be quantified using yield line analysis. In this work, Melan theorem of shakedown (lower bound) is employed. Requiring simple elastic envelope and the domain defining yield lines only are the advantages of the Melan theorem. The shakedown analysis can be conducted by the finite element method (FEM), which is the main body of this paper. In order to evaluate the method of this paper, which is in fact combining the Melan theorem and the FEM, two steel offshore frames are analyzed using the proposed method and the results obtained are compared with the results of classical non-linear analysis method.
机译:本文利用摇晃定理来评估弹塑性海上结构的摇晃极限。为了这个目的,需要结构对循环载荷工况的弹性响应的包络。降低极限基本上是一种有效的崩溃机制,可以使用屈服线分析进行量化。在这项工作中,采用了摇晃的Melan定理(下界)。仅要求简单的弹性包络和定义屈服线的区域是Melan定理的优点。可以使用有限元方法(FEM)进行震荡分析,这是本文的主体。为了评估本文的方法,该方法实际上结合了Melan定理和FEM,使用所提出的方法分析了两个钢制海上框架,并将所得结果与经典非线性分析方法的结果进行了比较。

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