用伪频响函数分析农用运输车模态参数  

Modal Analysis of Agricultural Vehicle by Pseudo-frequency Response Function

作　　者：向阳 佘少华[1] 

机构地区：[1]广东机电职业技术学院,广州510515

出　　处：《拖拉机与农用运输车》2008年第3期56-57,共2页Tractor & Farm Transporter

基　　金：国家自然科学基金资助项目(90411007);国家重点基础研究专项经费项目(2005CB321703)

摘　　要：农用运输车在行驶时,受到地面多个激励,应该用多输入多输出模型的辨识方法识别其模态参数。文章提出了伪频响函数的新概念及其计算公式。用该函数可以利用双通道动态分析仪计算多输入多输出系统的频响函数,得到复杂系统的试验模态参数。用该方法对农用运输车进行了多输入试验模态分析,得出了优于单点激励的结果。Road surface has an impact on each tyre of agricultural vehicle. It needs to identify modal parameters with multl-input and multi-output model, In this paper a new concept for pseudo-frequency response function and its calculating formulation are presented. From the function the dual channel dynamic analyzer which is only used for single-point excitation can be simply extended to solve random multiple-input excitation, The modal parameters of a agricultural vehicle are obtained by use of this method.

关 键 词：农用运输车 多输入多输出 动态分析仪 伪频响函数 模态参数 

分 类 号：S229.1[农业科学—农业机械化工程]