不同边界条件下由阻尼材料所制振动梁仿真计算  

Simulation of Vibration of Beams Made of Damping Materials with Different Boundary Conditions

作　　者：郝敏[1] 苏正涛[1] 裴高林[1] 王辰[1] 陈高升[1] 张浩[1] HAO Min;SU Zheng-tao;PEI Gao-lin;WANG Chen;CHEN Gao-sheng;ZHANG Hao(Beijing Institute of Aeronautical Materials, Aviation Key Laboratory of Science and Technology on Materials and Application Research for Vibration and Noise Reduction, Beijing 100095, China)

机构地区：[1]中国航空发动机集团公司北京航空材料研究院减振降噪材料及应用技术航空科技重点实验室,北京100095

出　　处：《噪声与振动控制》2017年第2期23-27,共5页Noise and Vibration Control

摘　　要：根据不同边界条件下振动梁的模态测试结果确定了振动梁振型和材料损耗因子,再由谐响应计算得到振动梁激励点和端点峰值、材料损耗因子,比较两种结果的差异,最终发现振动梁试样一端连接激振设备、另一端无约束(为自由端)、水平放置的实验方案最为合理。同时针对单个振动梁试样在测试频段内共振数据少的缺陷,采用改变试样长度、测试多组试样的方法加以规避。According to the modal testing results of vibrating beams under different boundary conditions,the modalshape and material loss factor are obtained.Through the harmonic response computation,the peak values of the responses atthe excitation point and the end of the beam and the loss factor of the material are derived.Comparing these results mutually,it can be concluded that the horizontally placed beam with one end excited and the other end free is the most reasonable.Finally,due to the shortage of the resonance data in the frequency range of the test,several sets of beam specimens withdifferent lengths are tested.

关 键 词：振动与波 振动梁 边界条件 模态振型 损耗因子 仿真计算 

分 类 号：O327[理学—一般力学与力学基础]