一种弹性安装条件下分配电箱的冲击仿真方法与试验研究
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摘要
为解决抗冲击时域分析中无法准确建立结构模型和模拟隔振系统的特性问题,首先基于ABAQUS软件,以弹性安装的分配电箱为研究对象,建立了隔振器-设备一体化仿真模型;然后,将液压双波冲击试验所采得的冲击激励信号作为输入,得出不同冲击激励下分配电箱的响应特性结果。结果表明:位移的仿真与试验误差小于10%,主应力峰值的仿真与试验误差小于13%,可满足一般的工程实际需求;误差主要由于仿真中未考虑阻尼和隔振器的动刚度的非线性。
In order to solve the problem of establishing structure model accurately and simulating the features of vibration isolation system in time domain analysis, firstly, equipment′s finite element mo-del is established to stimulate the integration of vibration isolator and equipment based on ABAQUS and taking electric distribution box under the condition of elastic mounting as research object. Then, by taking shock excitation signals collected in experiment as inputs, the response characteristics are obtained and analyzed. The result shows that the simulation and experimental error of displacement is less than 10%, and the error of simulation and test of main stress peak is less than 13%, which satisfies the practical general engineering demand. The error occurs mainly due to non-consideration of damping and the nonlinearity of isolator's dynamic stiffness in simulation.
In order to solve the problem of establishing structure model accurately and simulating the features of vibration isolation system in time domain analysis, firstly, equipment′s finite element mo-del is established to stimulate the integration of vibration isolator and equipment based on ABAQUS and taking electric distribution box under the condition of elastic mounting as research object. Then, by taking shock excitation signals collected in experiment as inputs, the response characteristics are obtained and analyzed. The result shows that the simulation and experimental error of displacement is less than 10%, and the error of simulation and test of main stress peak is less than 13%, which satisfies the practical general engineering demand. The error occurs mainly due to non-consideration of damping and the nonlinearity of isolator's dynamic stiffness in simulation.
引文
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[2]SCAVUZZO R J,PUSEY H C.Naval Shock Analysis and Design[M].Washington:The Shock and Vibration Information Analysis Center HI-TESTLaboratories.Inc.,2002.
[3]HARRIES C M,CREDE C E.Shock and Vibration Handbook[M].New York:McGraw-hill Book Company,1976.
[4]徐敏.船舶动力机械的振动冲击与测量[M].北京:国防工业出版社,1981.
[5]赵应龙,何琳,黄映云,等.船舶浮筏隔振系统冲击响应的时域计算[J].噪声与振动控制,2005,4(2):14-17.ZHAO Ying-long,HE Lin,HUANG Ying-yun,et al.Time-domain calculation of shock response of ship floating raft isolation system[J].Noise and Vibration Control,2005,4(2):14-17.(in Chinese)
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