关键词: 海洋平台, 离岸, 结构分析, 模糊识别, 地震响应

Abstract: 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 effects 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.

Key words: offahore platform, offshore, structuLrc an<3lvses, fuzzy diagnosis, seismic response