论文部分内容阅读
以某公司300ft自升式海洋平台桩腿为研究对象,根据平台的工作环境,采用Airy波理论和PM双参数谱计算平台桩腿不同工况下所受的波浪力谱,通过ANSYS有限元软件对平台进行三维建模,分析其在波浪力下的应力响应。同时考虑到腐蚀对于桩腿可靠性的影响,提出并建立在环境载荷与腐蚀耦合作用下的桩腿时变可靠性模型,根据应力响应分析结果,分析桩腿腐蚀最严重区域构件的时变可靠性变化规律,为平台桩腿在服役期间的维护与保养提供一定参考。
According to the work environment of the platform, the wave force spectrum under different working conditions of the pile leg of the platform is calculated by using Airy wave theory and PM double parameter spectrum. The ANSYS finite element software The platform is modeled three-dimensionally and its stress response under wave force is analyzed. Considering the influence of corrosion on the reliability of the leg, the time-dependent reliability model of the leg under the coupling of environment load and corrosion is proposed and established. According to the results of stress response analysis, the time-dependent reliability of the member with the most serious corrosion in the leg The law of change, provide a reference for the maintenance and maintenance of the platform leg during service.