离岸结构的动力分析与模糊地震响应

DYNAMIC ANALYSIS AND FUZZY EARTHQUAKE RESPONSE OF OFSHORE STRUCTURES

用响应谱理论研究了离岸结构的动力分析与地震分析。考虑了烈度的模糊性和场地土分类的模糊性，利用模糊随机过程模拟地震地面运动并给出了相应的计算公式。文中还对非线性流体阻力进行了等效线性化，得到非模糊地震响应的公式，在此基础上进一步考虑了离岸结构的模糊地震响应。并用算例进行了结果分析。

In this paper dynamic analysis and a seismic analysis of offshore structures are studiedwith response spectrum theory.After having considered the fuzziness of intensity and thefuzziness of site soil classification,the authors utilize fuzzy random process to simulate earth-quake ground movement and give the eorresponding formulas. The linearization of equal ef-fects for non-linear fluid resistance is also studied and the formulas for non-fuzzy earthquakeresponse are obtained. The fuzzy earthquake response of offshore structure is further consid-ered on the above work.In order to discuss the theory and methods,a simple example is cal-culated and the results are analyzed.