多孔材料声学参数辨识及其在双层板结构声学设计中的应用  

Acoustic parameters identification of porous materials and application in the acoustic design of the Double⁃wall

作　　者：彭涛 王晨[3] 燕群[1,2] PENG Tao;WANG Chen;YAN Qun(Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity,Aircraft Strength Research Institute of China,Xi'an 710065,China;National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research Institute of China,Xi'an 710065,China;Department of Basic Sciences,Air Force Engineering University,Xi'an 710051,China)

机构地区：[1]中国飞机强度研究所航空声学与振动航空科技重点实验室,陕西西安710065 [2]中国飞机强度研究所强度与结构完整性全国重点实验室,陕西西安710065 [3]空军工程大学基础部,陕西西安710051

出　　处：《振动工程学报》2023年第3期815-824,共10页Journal of Vibration Engineering

摘　　要：基于Biot理论,采用JCA(Johnson‑Champoux‑Allard)模型,依据多孔材料声学参数辨识技术,对玻璃纤维材料棉(玻璃棉)进行声学参数识别。将辨识结果引入双层板结构传声损失预计中,提出一种改进的FE‑SEA(Hybrid Finite Element‑Statistic Energy Analysis)建模思路。对双层板结构进行隔声测试,并将FE‑SEA预计结果与试验结果和SEA(Statistic Energy Analysis)结果分别进行对比分析。研究结果表明:基于声学参数辨识技术进行玻璃纤维材料棉声学参数识别是可行,可有效减少试验项目与次数;将识别参数引入改进的FE‑SEA模型中进行双层板隔声预计,所得结果与试验结果吻合良好。因此,可选用声学参数辨识技术对多孔材料声学参数进行识别,并作为数值计算的输入参数,进行含多孔材料结构的声学设计。JCA model is used to identify acoustic parameters of glass fiber according to the parameter identification technology of porous materials based on Biot theory.The identification results are regarded as input parameters of FE-SEA model of the double wall to evaluate its sound transmission loss.Meanwhile,the sound transmission loss experiment of the double wall is carried out in a standard acoustic laboratory,and the experimental results are compared with the numerical results.The following conclusions are obtained:it is feasible to use acoustic parameters identification method for glass fiber,which can obtain accurate acoustic parameters and reduce experimental items and times;it is reasonable to introduce the identification parameters into prediction model of sound transmission loss of the double wall,and the predicated results are in good agreement with experimental results.Therefore,the parameter identification method and FE-SEA method can be combined for the acoustic design of structures containing porous materials.

关 键 词：声学参数辨识 传声损失 多孔材料 双层板 

分 类 号：TB535[理学—物理] V414.8[理学—声学]