基于声管测量的粘弹性介质动态力学参数辨识方法  

Identification method of viscoelastic material dynamic parameters based on acoustic-pipe measurement

作　　者：陶猛[1,2] 赵阳[1] 

机构地区：[1]贵州大学机械工程学院,贵阳550025 [2]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《振动与冲击》2014年第5期97-101,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(11304050;51365007);高等学校博士学科点专项科研基金新教师类课题(20135201120007);上海交通大学机械系统与振动国家重点实验室开放课题(MSV-2013-01);上海交通大学船舶设备噪声与振动控制技术重点学科实验室开放课题(VSN-2013-01)

摘　　要：提出一种通过声管测量粘弹性覆盖层反射系数,识别粘弹性动态力学参数的方法。分别设计实心覆盖层和圆柱空腔覆盖层,测量实心覆盖层的反射系数可以计算得到粘弹性介质的复纵波声速,测量圆柱空腔覆盖层的反射系数、并结合求解粘弹性圆柱管的特征方程可以获得粘弹性介质的复剪切波声速,进而计算复杨氏模量和复泊松比。最后,对某种橡胶材料进行了声管测试,并对粘弹性动态力学参数的识别结果进行了分析和讨论。An identification method of viscoelastic material dynamic parameters based on the reflection coefficient measurement of viscoelastic layer in an acoustic-pipe was developed.Two different types of layers,one being solid and the other containing a cylindrical-hole,were taken for parameters identification.The complex longitudinal sound were speed of viscoelastic material was calculated through the reflection coefficient measurement of the solid sample.Besides,combining the coefficient measurement of the cylindrical-hole sample and solving the characteristic equation of a viscoelastic-tube, the complex transverse sound wave speed of viscoelastic material was identified.Then,the complex Young＆#39;s modulus and the complex Poisson＆#39;s ratio were calculated easily.Finally,a rubber sample was tested an the acoustic-pipe,and the identification results of the rubber dynamic parameters were analyzed and discussed.

关 键 词：声管测量 粘弹性介质 动态力学参数 识别方法 圆柱空腔 

分 类 号：TB56[交通运输工程—水声工程]