基于概率有限元的气缸盖疲劳可靠性分析

吴波; 秦新锋; 贾晓亮; 邓雅冲

doi:10.3969/j.issn.1001-2222.2017.03.006

车用发动机 >

2017 , Vol. 0 >Issue 3: 33 - 37

DOI: https://doi.org/10.3969/j.issn.1001-2222.2017.03.006

栏目

基于概率有限元的气缸盖疲劳可靠性分析

吴波 ,
秦新锋 ,
贾晓亮 ,
邓雅冲

展开

(1. 中国北方发动机研究所（天津），天津 300400； 2. 北京理工大学机械与车辆学院，北京 100081;3. 中国人民解放军驻616厂军事代表室，
山西大同 037036； 4. 中国人民解放军陆军装甲军代局驻天津军代室，天津 300400)

收起

Fatigue Reliability Analysis of Cylinder Head Based on Probability Finite Element Method

WU Bo ,
QIN Xinfeng ,
JIA Xiaoliang ,
DENG Yachong

Expand

（1. China North Engine Research Institute（Tianjin）, Tianjin 300400, China；2.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; 3. Military Representative office of the Chinese People’s Liberation Army in 616 Factory, Datong 037036, China;4. Military Representative office of the Chinese People’s Liberation Army Armored Troops, Tianjin 300400, China）

Fold

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。

关键词： 概率有限元; 柴油机; 气缸盖; 结构疲劳; 可靠性

本文引用格式

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 , 0(3) : 33 -37 . DOI: 10.3969/j.issn.1001-2222.2017.03.006

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.

Key words： probability finite element; diesel engine; cylinder head; structure fatigue； reliability

Options

摘要页面

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract