低速载货汽车车架的模态实验与验证  

Modal Experiment and Verification of Low-speed Truck Frame

作　　者：花勇 李尚平[1] 李冰[1] 

机构地区：[1]广西工学院机械工程系,广西壮族自治区柳州市545000

出　　处：《农业装备与车辆工程》2013年第1期5-8,共4页Agricultural Equipment & Vehicle Engineering

基　　金：广西车辆零部件先进设计制造重点实验室培育基地开放基金项目<农用运输机械关键部件动态特性研究与结构优化>;项目编号:2012KFZD02

摘　　要：为研究低速载货汽车车架的模态参数,运用有限元软件HyperWorks对低速载货汽车车架进行了自由模态的分析。同时基于LMS Test LAB振动测试系统对低速载货汽车车架进行了模态试验,采用最小二乘复频域法(LSCF法)提取车架的模态参数,得到在低频范围内与有限元模态分析结果基本一致的模态频率和振型。模态实验的结果验证了该有限元模型的正确性,进而为车架的改进设计提供理论依据。In order to study the modal parameters of low-speed truck frame, the free modal analysis of low-speed truck frame was done by the finite element software of Hyperworks. At the same time, the modal test of vehicle frame was carried out based on the LMS Test LAB vibration test system. Least Squares Frequency Domain method （the LSCF method） is used to extract the modal parameters of low-speed truck frame in the experiment,and the modal frequency and vibration mode were obtained which was almost the consistent results of finite element software in the range of low frequency. So the results of modal experiment proved the correctness of finite element modal and also provided the theoretic foundation for the improvement of frame＇s design.

关 键 词：车架 有限元HyperWorks 试验模态 模态分析 

分 类 号：S229.1[农业科学—农业机械化工程] U463.32[农业科学—农业工程]