作者：向玲, 鄢小安, 陈涛
作者单位：华北电力大学机械工程系, 河北 保定 071003
关键词：锤击法;悬臂梁;模态分析;振型
摘要：
为分析某悬臂梁的振动模态,根据锤击法模态测试流程,利用PolyMAX方法对悬臂梁的传递函数进行模态参数估计和识别。利用有限元软件和欧拉梁理论仿真并计算该悬臂梁前五阶固有频率和振型。结果表明:对悬臂梁的实验分析结果和理论值、仿真值吻合良好,说明锤击法的模态实验可靠,为以后分析相似结构的模态提供参考。
Vibration modal analysis of cantilevered beam based on PloyMAX method
XIANG Ling, YAN Xiaoan, CHEN Tao
School of Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Abstract: In order to analyze the vibration modes of a cantilever beam, the PolyMAX method of software LMS Test. Lab is used to estimate and identify the modal parameters in the transfer functions of the cantilever beam according to the testing process of hammering method. Finite element software and Euler beam theory are used to simulate and calculate the first 5-order natural frequency and modal shape of the cantilever beam. The analytical results agree well with the theoretical value and the simulation value. This indicates that the modal experiment with hammering method is successful and can provide a reference for later model analysis of similar structures.
Keywords: hammer exciting method;cantilevered beams;modal analysis;modal shape
2016, 42(4): 132-135 收稿日期: 2015-05-15;收到修改稿日期: 2015-07-29
基金项目: 国家自然科学基金项目(11072078)河北省自然科学基金项目(E2013502226)
作者简介: 向玲(1971-),女,湖北随州市人,教授,博士,研究方向为机械状态检测与故障诊断。
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