• 机械基础工程 •

### 不确定声-固耦合模型高频分析的随机统计能量方法

1. 1. 天津大学机械工程学院，天津，300350
2. 中国汽车技术研究中心有限公司，天津，300300
3. 天津航天瑞莱科技有限公司，天津，300462
• 出版日期:2021-04-25 发布日期:2021-05-10
• 通讯作者: 董俊红(通信作者)，女，1983年生，高级工程师、博士。研究方向为不确定理论及车身优化设计。E-mail：dongjunhong@catarc.ac.cn。
• 作者简介:郝耀东，男，1988年生，高级工程师、博士研究生。研究方向为汽车NVH技术。发表论文20余篇。E-mail：hao_yaodong@foxmail.com。

### Stochastic Statistical Energy Method for High-frequency Analysis of Uncertain Acoustic-Structural Coupling Model#br#

HAO Yaodong1,2;GU Cansong2;ZHOU Huanyang3;DONG Junhong2；LI Hongliang2；DENG Jianghua2

1. 1. School of Mechanical Engineering, Tianjin University, Tianjin,300350
2. China Automotive Technology & Research Center Co.,Ltd.,Tianjin, 300300
3. Tianjin Aerospace Reliability Technology Co., Ltd., Tianjin, 300462
• Online:2021-04-25 Published:2021-05-10

Abstract: In order to solve the uncertainty problems of vehicle statistical energy analysis, a stochastic uncertainty statistical energy method for vehicle acoustic-structural coupling model was proposed. In this method, structural and acoustic cavity material parameters were taken as uncertain variables. A statistical energy model of acoustic-structural coupling system was built. Both of damping loss factors and coupling loss factors were calculated. Their partial derivatives with respect to material parameters were analyzed. Based on the theory of stochastic algorithm, the formulas for calculating the mean and standard deviation of noise were derived under uncertain material parameters. The stochastic uncertain statistical energy method was applied to simple plate cavity model and car firewall cavity model respectively, and the noise fluctuation characteristics of the model were solved under uncertain conditions successfully.