汽车用防声材料的SEA参数预测

声学特性的预测工具已经被应用于计算声音包对声腔阻尼的影响.文中基于转移矩阵法,提出一种能够预测多层结构防声材料声学特性的方法.该方法通过考虑绝缘部分与结构的非均匀特性,允许在统计能量分析SEA软件外计算多层绝缘元件的数量.将该方法用于预测修正元件的传播损耗,结果表明预测结果和实验结果符合较好.

Prediction of SEA Parameters of Anti-Noise Material for Vehicles

The prediction tools of acoustic property have been applied to the investigation of the effect of sound package on acoustic cavity damping.This paper proposes a transfer matrix-based method to predict the acoustic property of multi-layered anti-noise material.In the proposed method,the non-uniformities of the insulation part and the structure are both considered,and the quantity of multilayered insulation components can be calculated outside the statistical energy analysis(SEA) program.The application of the proposed method to the transmission loss prediction of correction components shows that the predicted results accord well with the measured ones.