| 基于裂纹扩展的海洋平台疲劳可靠性分析 |
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| 引用本文： | 陈飞宇,卢丙举,赵世平,程栋. 基于裂纹扩展的海洋平台疲劳可靠性分析[J]. 船舶工程, 2019, 41(S1): 180-184 |
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| 作者姓名： | 陈飞宇 卢丙举 赵世平 程栋 |
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| 作者单位： | 中国船舶重工集团公司第七一三研究所;河南省水下智能装备重点实验室,中国船舶重工集团公司第七一三研究所,中国船舶重工集团公司第七一三研究所,中国船舶重工集团公司第七一三研究所 |
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| 基金项目： | 国家重点基础研究发展计划资助项目（2014CB046803）；国家自然科学基金资助项目（51239008）。 |
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| 摘 要： | 文章基于裂纹疲劳基本理论,针对在役导管架平台出现初始裂纹状态下结构承载力进行分析,考虑结构损伤与腐蚀等因素,建立了典型导管架平台整体结构模型和局部子模型,分析了在该工况下平台整体结构的疲劳强度,并确定了平台结构的疲劳关键部位。采用几何应力外插法计算了热点应力,基于疲劳裂纹扩展的疲劳分析方法,计算了疲劳关键节点的疲劳寿命与疲劳可靠度。该方法能够为海洋平台结构的维护和保养提供一定参考。
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| 关 键 词： | 疲劳裂纹 裂纹扩展 热点应力 疲劳寿命 可靠度 |
| 收稿时间： | 2018-12-04 |
| 修稿时间： | 2019-07-28 |
Study on Reliability Assessment and Fatigue Life of Jacket Platform Based on the Theory of Crack Propagation |
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| Abstract: | In this article, the bearing capacity of jacket platforms with initial cracks was analyzed based on crack fatigue theory. Integral structure model and local sub-model of typical jacket platforms was established by taking structural damage and corrosion into consideration. The fatigue strength of the platform was analyzed and located key structure parts. In this paper, hot spot stress was calculated by means of geometric stress extrapolation, fatigue life and fatigue reliability of key fatigue joints was calculated based on the method of fatigue crack propagation. The method mentioned can provide guidance for the maintenance and repair of platform structure. |
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| Keywords: | fatigue crack crack propagation hot spot stress fatigue life fatigue reliability |
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