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In the measurement of damping material's dynamic mechanical performance (DMP) using flexural resonating cantilever beam method, the specimen's adhesive characteristic influences the test precision and accuracy. Taking its effect into account, the improved measurement equations based on the resonance method are presented. The simulated resuits show that, for the sake of weakening the adhesive's influence on the measured results, the adhesive should be spreaded as thin as possible when specimen is prepared, the adhesive's density and loss factor should be selected as small as possible also, and its Young's modulus should be selected according to the damping material being measured; the same adhesion condition effects differently on the test results of different damping materials, i.e. the error due to the adhesive is more inconspicuous if the damping layer has bigger thickness, modulus, loss factor and a certain density according to the damping material being measured. These conclusions provide theoretical basis for selecting adhesive, improving adhesion technology, and designing specimen. 相似文献
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基于有限元和边界元理论的结合,利用大型有限元分析软件ANSYS和声振分析软件SYSNOISE,建立了重流体介质与半封闭结构的耦合振动声辐射模态分析模型,并采用结构有限元和流体有限元相结合,以建筑圆柱钢模板的振动声辐射为例进行模态分析、振动响应以及声辐射特性分析,得到了在流体加载下模板的耦合模态振型、结构的节点位移、结构能量等等。还利用CAE软件结果的可移植性,考虑了半封闭加筋圆柱结构内外分布不同介质时,实现了双边耦合振动声辐射分析求解。这一求解方法的实现对今后该类振动声辐射分析提供了重要的参考。 相似文献
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振动测试中传感器数目和位置设计的谐响应分析方法 总被引:1,自引:0,他引:1
针对结构振动响应信号包含模态的测量可观性问题,利用有限元软件ANSYS对简支板结构进行了谐响应分析,然后根据各种输入情形下振动响应能量的分布对振动测试中传感器的布放位置及数量进行了设计,仿真分析与实验结果的一致性表明该方法是有效的。 相似文献
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