基于有限元的S385型柴油机机体自由和约束模态分析  

Free and Constraint Modal Analysis of S385 Diesel Engine Block based on Finite Element Method

作　　者：高岩[1] 郑忠才[2] 刘波 张坤金[2] 陈海鸥[2] 

机构地区：[1]山东电子职业技术学院,山东济南250014 [2]山东建筑大学机电学院,山东济南250101 [3]青特集团有限公司,山东青岛266000

出　　处：《内燃机与动力装置》2009年第5期31-36,共6页Internal Combustion Engine & Powerplant

基　　金：山东省自然科学基金(项目号Y2006F33)

摘　　要：根据S385型柴油机机体的结构特点,利用有限元分析方法对其进行了自由模态和约束模态的有限元分析。采用兰索斯法计算出了机体前十一阶自由模态和约束模态的固有频率及相应振型,通过振型分析找到了机体刚度的薄弱部位并提出了相应的修改措施,为机体结构的改进设计提供了理论依据。Free and constraint modal with finite element analysis is conducted on S385 diesel engine block using FEA according to its structural characteristics. The natural frequencies and corresponding vibration modes of the first eleventh steps of each block in free and constraint modal is calculated using Lanczos method. By the analysis of vibration modes, the weak spots of the block were found and corresponding improved schemes has been proposed. The analysis results provide a theoretical support to improve the structural design of the block.

关 键 词：柴油机 机体 有限元 模态分析 

分 类 号：TK422.5[动力工程及工程热物理—动力机械及工程]