叉车车架的试验模态分析  

Test Modal Analysis of Forklift Frame

作　　者：相曙锋[1] 沈晓庆[1] 

机构地区：[1]杭叉集团股份有限公司

出　　处：《工程机械》2014年第7期21-25,6,共5页Construction Machinery and Equipment

摘　　要：试验模态分析建立在试验的基础上,可评价结构的动态特性是否符合要求,校验理论计算结果的正确性,并且可以识别系统的阻尼,所得动态特征参数比较准确(尤其是低阶模态)。为改善叉车整体的动态特性,采用LMS Test.Lab软件对某型3 t叉车的车架进行试验模态分析,并采用试验模态理论拟合,得到车架的模态频率、振型和阻尼比,为整车动态特性分析和减振降噪研究提供基础。A test modeling analysis was based on the tests,which can evaluate whether the structural dynamic characteristics meet the requirements or not,among other items with relatively accurate data of the dynamic characteristics(especially for the lower grade modal).For better dynamic features of the forklift truck we adopted LMS Test.Lab software to carry out a test modal analysis of a 3 t forklift truck and integrating it with a test modal theory to have got modal frequencies,vibratory types and retardation ratio of the frame,thus providing a basis for functional analyses and reduction of vibration and noise of fork-lift truck as a whole.

关 键 词：试验模态 频率 振动 

分 类 号：TH242[机械工程—机械制造及自动化]