| 基于概率有限元的气缸盖疲劳可靠性分析 |
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| 引用本文： | 吴波,秦新锋,贾晓亮,邓雅冲.基于概率有限元的气缸盖疲劳可靠性分析[J].车用发动机,2017(3). |
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| 作者姓名： | 吴波 秦新锋 贾晓亮 邓雅冲 |
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| 作者单位： | 1. 中国北方发动机研究所(天津),天津300400;北京理工大学机械与车辆学院,北京100081;2. 中国人民解放军驻616厂军事代表室,山西大同,037036;3. 中国人民解放军陆军装甲军代局驻天津军代室,天津,300400 |
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| 基金项目： | 天津市企业博士后创新项目择优资助计划资助项目 |
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| 摘 要： | 提出了一种基于均匀试验设计和BP神经网络模型构建随机参数与结构响应之间的近似非线性关系的概率有限元方法,该方法较直接Monte-Carlo法需要的样本数据大幅减少,更适合大规模计算的结构概率有限元分析。采用该方法以某型柴油机气缸盖结构疲劳失效分析为算例,进行了可靠度期望寿命计算,并通过对影响气缸盖应力的燃烧压力、各螺栓预紧力和喷油器压紧力等22个载荷参数的均值和标准差的敏感性分析,初步确定了造成气缸盖本体结构疲劳开裂的主要影响因素。
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| 关 键 词： | 概率有限元 柴油机 气缸盖 结构疲劳 可靠性 |
Fatigue Reliability Analysis of Cylinder Head Based on Probability Finite Element Method |
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| WU Bo,QIN Xinfeng,JIA Xiaoliang,DENG Yachong.Fatigue Reliability Analysis of Cylinder Head Based on Probability Finite Element Method[J].Vehicle Engine,2017(3). |
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| Authors: | WU Bo QIN Xinfeng JIA Xiaoliang DENG Yachong |
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| Abstract: | A probability finite element method used to construct the approximate nonlinear relation between random parameters and structure responds was supposed based on uniform design and BP neural network.Compared with direct Monte-Carlo method,this method reduced sampled data greatly and was better to apply to the large-scale engineering structure probability finite element calculation.Fatigue failure case of diesel engine cylinder head was carried out by this method.The fatigue reliability life was calculated and the sensitivity analysis of 22 loading parameters such as burning pressure,bolts pre-loading and fuel injector pre-loading was performed too.The main influencing parameters which caused cylinder head structure fatigue failure were determined preliminarily in the end. |
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| Keywords: | probability finite element diesel engine cylinder head structure fatigue reliability |
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