| 随机波浪载荷作用下导管架平台动力响应及疲劳可靠性分析 |
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| 引用本文： | 黄怀州,洪明,迟少艳.随机波浪载荷作用下导管架平台动力响应及疲劳可靠性分析[J].船舶力学,2006,10(4):65-71. |
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| 作者姓名： | 黄怀州 洪明 迟少艳 |
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| 作者单位： | 1. 大连理工大学船舶工程系,辽宁,大连,116023
2. 中国船舶与海洋工程设计研究院,上海,200011 |
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| 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.
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| 关 键 词： | 导管架结构 随机波浪谱 随机响应 疲劳可靠性 |
| 文章编号： | 1007-7294(2006)04-0065-07 |
| 收稿时间： | 2005-07-15 |
| 修稿时间： | 2005年7月15日 |
Dynamic response and fatigue reliability analysis of jacket platform under wave loads |
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| HUANG Huai-zhou,HONG Ming,CHI Shao-yan.Dynamic response and fatigue reliability analysis of jacket platform under wave loads[J].Journal of Ship Mechanics,2006,10(4):65-71. |
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| Authors: | HUANG Huai-zhou HONG Ming CHI Shao-yan |
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| Abstract: | 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. |
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| Keywords: | jacket platform wave force spectrum random response fatigue reliability |
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