基于特征值灵敏度分析的发动机结构动力学模型修正  

Correction of Engine Structure Dynamic Model Based on Eigenvalue Sensitivity Analysis

作　　者：程魁玉[1] 李玉军[1,2,3] 杨建国[3] 

机构地区：[1]中国汽车技术研究中心催化净化工程中心,天津300162 [2]天津大学机械工程学院,天津300072 [3]武汉理工大学能源与动力工程学院,武汉430063

出　　处：《汽车工程》2009年第8期725-727,745,共4页Automotive Engineering

摘　　要：对某发动机零部件结构和整体结构分别进行了有限元模态分析,并通过模态试验对有限元模态分析模型进行验证;针对发动机整体有限元模态分析误差较大的问题,利用灵敏度分析法,对其进行了动力学模型修正;修正后的发动机整体结构模型具有较高的仿真精度,为后续的发动机动力学分析奠定基础。Finite element modal analyses are conducted on both components and overall structure of engine. Then modal tests are also done on them to validate the finite element model for modal analyses. In view of the relatively large error in finite element modal analysis for overall engine structure, its dynamic model is corrected by means of eigenvalue sensitivity analysis. The corrected model for engine overall structure has higher simulation accuracy, laying a foundation for follow-up engine dynamic analysis.

关 键 词：发动机 模型修正 模态分析 特征值灵敏度分析 

分 类 号：U464[机械工程—车辆工程]