复杂组合结构的有限元模态分析  

Finite Element Modal Analysis for the Complex Combined Structure Compared with Test

作　　者：崔志琴[1] 苏铁熊[1] 赵冬青[1] 白小兰[1] 

机构地区：[1]华北工学院机械电子工程系,山西太原030051

出　　处：《华北工学院学报》2001年第3期180-182,共3页Journal of North China Institute of Technology

基　　金：部级"九五"预研项目

摘　　要：目的　建立某大功率柴油机机体 +曲轴组合结构的有限元模型 ,并对其进行有限元模态分析 .方法　应用动态子结构法建立有限元模型 ,用虚拟材料来模拟其结合面的动态性能 .结果　计算出前 5阶固有频率和主振型 ,与试验结果比较吻合 .结论　说明所建机体 +曲轴组合结构的有限元模型正确 。Aim\ The finite element model of the combined structure of block of a heavy duty diesel with crankshaft is established for modal analysis. Methods\ The dynamic substructuring method is applied to establish the finite element model, and virtual material is applied to simulate the dynamic characteristics of interface between the complex combined structure. Results\ The first five natural frequencies and the modal shape calculated with this modelis very close to the experimental result. Conclusion\ The finite element model is correct, and a basis for the dynamic simulation study for the engine is provided.

关 键 词：组合结构 虚拟材料 模态分析 柴油机 机体 曲轴 

分 类 号：TK423.1[动力工程及工程热物理—动力机械及工程]