摘要
应用模糊数学理论,对海洋石油钻采平台构件在动力作用下的模糊性进行了论述,分析了海底地基对海洋石油钻采平台桩腿的模糊约束效应,研究了在模糊海浪载荷作用下,具有模糊约束效应的桩腿的模糊动力响应,给出了桩腿的模糊动力响应谱,并提供了在一定置信度水平下平台的桩腿可能出现的最大位移谱。这对进一步分析海洋石油钻采平台主要构件的疲劳可靠性,将是十分重要的。
Dynamic factors,such as wind,sea wave and current acting on themembers of an offshore drilling and production platform are all of uncertainty and show randomness and fuzziness.A systematic analysis of randomness was made in the light of random process theory.A fuzzy analysis of the structural members under dynamic load was carried out.The fuzzy constraint of sea bed soil to platform leg was analyzed.Fuzzy dynamic response of platform leg under fuzzy sea wave load was studied and the dynamic response spectrum was given.The maximum displacement spectrum of platform leg at a certain level of confidence was proposed.This information is importment for further fatigue reliability analysis.
出处
《石油大学学报（自然科学版）》
CSCD
1991年第1期48-58,共11页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
海洋
石油
平台
桩腿
Offshore oil
Platform legs
Frequency analysis
Frequency response
Fuzzy theory
