考虑非线性因素的气缸盖刚强度分析与评估  

Analysis and Evaluation of Strength and Stiffness for Cylinder Head Based on Non-linear Factors

作　　者：徐岩[1] 田小飞[2] 王艳霞[2] 

机构地区：[1]中国兵器科学研究院,北京100089 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《车用发动机》2011年第6期20-23,27,共5页Vehicle Engine

摘　　要：对不同工况下气缸盖的强度和变形情况进行了研究,建立了气缸盖—气缸垫—气缸套—机体的组合体三维实体模型,进行了网格划分及仿真分析。考虑了气缸盖与气缸垫之间接触非线性因素以及气缸垫的材料非线性因素对气缸盖刚强度的影响,在进行正常工况机械强度计算的基础上,缸内最高燃烧压力增加为18MPa和20MPa工况下,对气缸盖的强化潜力进行了对比分析,分析了强化前后工程中比较关注部位的应力分布以及气缸盖底板火力面的变形分布情况。The strength and deformation of cylinder head under different conditions were researched, the three-dimensional solid model of cylinder head-gasket-liner-block composites was built and finally mesh generation and simulation analysis were carried out. The non-linear factor of cylinder head and gasket contact, as well as that of gasket material, was taken into consideration in the calculation. Based on the mechanical intensity calculation of normal conditions, the intensifying potentials of cylinder head were analyzed under the condition that the maximum cylinder pressure increased to 18 MPa and 20 MPa respectively. The stress distribution of largely concerned sites and the deform- ation of cylinder head fire surface were analyzed before and after strengthening.

关 键 词：气缸盖 强度 刚度 有限元法 非线性 

分 类 号：TK423.2[动力工程及工程热物理—动力机械及工程]