Acoustic-vibration environment prediction of a double-layered thick-walled structure based on the damping identification

被引：0

作者：

Zhao C. ^{[1
,2
]}

Li B. ^{[2
]}

Zhang Z. ^{[2
]}

Niu Z. ^{[2
]}

Liu B. ^{[2
]}

机构：

[1] Institute of aerospace Science and Engineering National University of Defense Technology, Changsha

[2] China Academy of Launch Vehicle Technology, Beijing

来源：

Li, Bingwei | 1600年 / Chinese Vibration Engineering Society卷 / 36期

关键词：

Acoustic-vibration environment; Damping identification; Double-layered thick-walled structure; Environment prediction;

D O I：

10.13465/j.cnki.jvs.2017.21.033

中图分类号：

学科分类号：

摘要：

The main cabins of hypersonic vehicles are usually designed as double-layered thick-walled structures in order to meet the requirement of heatproof and load bearing. The acoustic-vibration environment prediction of a double-layered thick-walled structure was investigated for the sake of obtaining the precise acoustic-vibration environment of the cabin. A method for identifying the damping loss factor was proposed based on the vibro-acoustic experiments, and the process of acoustic-vibration environment predication was given. The acoustic-vibration coupling environment of a hypersonic vehicle cabin, which is double-layered thick-walled, was studied using the statistical energy analysis method. The vibro-acoustic experiment was carried out, and the damping loss factor was identified based on the experimental data. The result shows that the prediction of the acoustic-vibration environment corresponds well with the experiment results. The method for structural damping loss factor identification and acoustic-vibration prediction of thick wall structures is significant for the precise environment prediction of hypersonic vehicles, and can be widely used in the areas of aviation, aerospace, ship, and automobile industry. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：225 / 231

页数：6

共 10 条

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