车用柴油机振动模态分析  

Analysis of vehicle diesel engine on vibration modal

作　　者：谭季秋[1,2] 鄂加强[2] 左青松[2] 伍新[1] 

机构地区：[1]湖南工程学院机械工程学院,湖南湘潭411101 [2]湖南大学机械与运载工程学院,湖南长沙410082

出　　处：《中南大学学报（自然科学版）》2014年第9期3015-3020,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51176045)

摘　　要：为避免车用柴油机共振破坏问题,采用有限元分析方法建立车用柴油机振动方程,通过求解车用柴油机振动方程得到车用柴油机振动系统的固有频率和主振型,并与实验模态分析结果进行对比。研究结果表明,前6阶的理论模态频率与实验模态频率的相对误差在-5%-5%之间波动,其最大相对误差为4.480%,最小相对误差为-4.809%,表明车用柴油机的理论模态分析结果是有效的,可信度较高。In order to avoid the damage problems of vehicle diesel engine vibration, vehicle diesel engine vibration equation was established by applying finite element analysis method. Natural frequency and dominant vibration mode of the vehicle diesel engine vibration system were gained by solving vehicle diesel engine vibration equation and compared with the experimental modal analysis＇ results. The results show that the fluctuation of the relative errors between the first 6-order theoretical modal frequencies and its experimental modal frequencies for vehicle diesel engine is-5% to 5%, and the maximum relative error is 4.480% and the minimum relative error is-4.809%, which indicates that the theoretical modal analysis results of vehicle diesel engine are effective and credible.

关 键 词：柴油机 振动 理论模态分析 实验模态分析 固有频率 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]