海洋平台结构地震响应不确定性因素分析

UNCERTAIN FACTORS ANALYSIS OF SEAPLATEFORM STRUCTURE EARTHQUAKE RESPONSE

本文将海洋平台结构的刚度、质量、阻尼以及动水阳力系数C_m,C_d模拟为随机变量,利用随机有限元法,分析了这些参数的变异性引起的海洋平台结构地震响应变异性问题。结果表明,海洋平台结构地震响应的变异性与输入结构参数本身的变异性具有同一量级,动水阻力参数变异性对平台反应的影响比结构参数变异性平台反应的影响稍小。

In this paper,the stiffhess,mass,damping of sea-plateform.structure and hydrodynamic resistance coefficient Cm,Cd is simulted as random variables.The problem of variability of sea-plateform earthquake response caused by the variability of random variables abova is analysis by employing the random finite eliment method.the results show that the sea-plateform earthquake response variability and the variability of input structure parameter itself has the same grade,the influences of the variability or bydrodynamic resistance coefficient decrease slightly than the influenees of structure parameter to sea-plateform response.