摘要
主要针对波浪载荷作用下导管架式海洋平台结构的疲劳可靠性进行研究。采用Airy线性波浪理论,将导管架结构离散成空间梁有限单元结构;在此基础上采用结构模态分析方法,编程计算了平台结构在随机波浪载荷作用下的位移、速度、加速度和应力随机响应及其概率统计量。导管架结构疲劳可靠性分析建立在频域响应的基础上,假设结构响应的应力范围服从Rayleigh分布,利用结构应力传递函数得到结构应力响应谱,然后利用Miner线性累积损伤准则推导出结构疲劳寿命的概率分布函数,并考虑结构疲劳强度影响系数的随机性,求得结构在随机应力谱下给定疲劳寿命时的疲劳可靠性指标。文中所建立方法可用于导管架式平台结构的疲劳安全评估。
The spectrum of wave loads is reduced by the Airy Wave Theory and the linearized Morison Equation. The model analysis methods and the space frame finite element are used to carry out the responses of offshore structure, including the displacement response and the stress response. The fatigue reliability analysis of structure is based on the structural response analysis in the frequency domain.In the fatigue reliability analysis,supposing the stress is in Rayleigh distribution.And the spectrum of stress is performed by the transfer function of the jacket platform.The results show that the Miner model can be applied to calculate the fatigue reliability of the structure.
出处
《船舶力学》
EI
北大核心
2006年第4期65-71,共7页
Journal of Ship Mechanics
关键词
导管架结构
随机波浪谱
随机响应
疲劳可靠性
jacket platform
wave force spectrum
random response
fatigue reliability
作者简介
黄怀州（1977-）,男,大连理工大学船舶工程系硕士研究生.
