摘要
利用商业有限元软件,建立了数值模拟驻波管法测量材料的有限元模型,通过与实验结果和理论解对比,探讨了驻波管材料的杨氏模量、泊松比、密度三个物理量分别对于隔声量测量的影响。结果表明,驻波管材料参数中对隔声量计算影响最大的因素是杨氏模量,当驻波管材料的杨氏模量为待测样品材料的杨氏模量的15倍以上时,测量结果才比较可信;杨氏模量较小时,泊松比和密度对结果有一定影响,杨氏模量足够大时,泊松比和密度的影响可以忽略。
Based on a commercial finite element software, the finite element models for numerical simulation of standing wave tube material were established. By comparing with the experimental results and theoretical solutions, the impact of the Young＇s modulus, Poisson＇s ratio and density on the measurement of sound transmission loss were respectively studied. The results show that the most influential factor is the Young＇s modulus. When the Young＇s modulus of the standing wave tube material is more than 15 times of the Young＇s modulus of the sample material to be measured, the measurement results can be trusted, when the Young＇s modulus is relatively small, the Poisson＇s ratio and the density have a certain effect on the results, and when the Young＇s modulus is large enough, the influence of Poisson＇s ratio and density can be neglected.
作者
李青
邹早建
LI Qing;ZOU Zao-jian(School of Naval Architecture, Ocean ＆ Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, Chin)
出处
《机械设计与制造》
北大核心
2018年第A01期132-135,139,共5页
Machinery Design & Manufacture
关键词
驻波管
隔声量
杨氏模量
泊松比
密度
Standing Wave Tube
Sound Transmission Loss
Young＇s Modulus
Poisson＇s Ratio
Density
