基于波动耦合的复杂结构动力响应分析与研究

doi:10.7527/S1000-6893.2014.0313

固体力学与飞行器总体设计

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基于波动耦合的复杂结构动力响应分析与研究

林华刚, 闫云聚, 李鹏博

西北工业大学力学与土木建筑学院, 西安 710129

收稿日期:2014-05-19 修回日期:2014-11-13 出版日期:2015-05-15 发布日期:2014-12-09
通讯作者: 闫云聚Tel.: 029-88431001 E-mail: yjyan_2895@nwpu.edu.cn E-mail:yjyan_2895@nwpu.edu.cn
作者简介:林华刚男, 博士研究生。主要研究方向: 结构声振耦合分析、噪声振动控制与优化设计。 Tel: 029-88431001 E-mail: huagangl@126.com;闫云聚男, 博士, 教授, 博士生导师。主要研究方向: 结构损伤和振动检测的理论与技术、声振耦合分析与计算、故障信号分析与特征提取。 Tel: 029-88431001 E-mail: yjyan_2895@nwpu.edu.cn;李鹏博男, 博士研究生。主要研究方向: 噪声致振分析、信号处理与数据挖掘。 Tel: 029-88431001 E-mail: lipb126@163.com
基金资助:
高等学校博士学科点专项科研基金(优先发展领域) (20126102130004)

Analysis and research of dynamic response of complex structure based on wave coupling

LIN Huagang, YAN Yunju, LI Pengbo

School of Mechanics and Civil & Architecture, Northwestern Polytechnical University, Xi'an 710129, China

Received:2014-05-19 Revised:2014-11-13 Online:2015-05-15 Published:2014-12-09
Supported by:
Specialized Research Fund for the Doctoral Program of Higher Education of China (priority developing area) (20126102130004)

摘要/Abstract

摘要：

有限元法(FEM)适合低频分析,统计能量分析(SEA)方法适合高频分析,而一类较宽频带(中频段)的声振响应问题不适合单独用FEM或SEA方法解决。基于波动耦合的混合FE-SEA方法兼顾了FEM与SEA方法的优点,可预测中频段含一定不确定性的声振系统的稳态响应。本文阐释了混合FE-SEA方法的理论,分别通过典型结构的蒙特卡罗仿真与复杂系统的噪声试验两案例对该方法进行了验证,其中梁-板典型结构能量响应计算值与蒙特卡罗仿真值具有较好的一致性;复杂飞行器系统的振动响应与试验结果较为吻合,舱内噪声声压级(SPL)误差小于3 dB,证明了混合FE-SEA方法的有效性,解决了FEM与SEA方法在中频复杂声振响应中的局限性这一问题。

关键词: 复杂组合系统, 中频分析, 波动耦合, 混合FE-SEA方法, 噪声致振

Abstract:

The finite element method (FEM) is suitable for low-frequency analysis, while statistical energy analysis (SEA) method for high-frequency analysis, but a class of vibro-acoustic problem in a broad band (middle frequency) is not suitable for merely using the FEM or SEA method to solve. Taking the advantages of both FEM and SEA method, hybrid FE-SEA method based on wave coupling can predict the steady-state response of vibro-acoustic systems with a certain range of uncertainty. This article explains the theory of hybrid FE-SEA method and validates the method through two cases of Monte Carlo simulation of typical structure and the noise test of complex systems, and the energy response of the beam-plate composite structure has a good consistency with the value of Monte Carlo simulation; the vibration response of the complex aircraft's vibro-acoustic systems agrees well with test result; the error of sound pressure level (SPL) in cabin is less than 3 dB; the two cases prove the effectiveness of the hybrid FE-SEA method, and the limitations of solving complex vibro-acoustic response using the FEM or SEA method at the middle frequency are overcome.

Key words: complex built-up system, mid-frequency analysis, wave coupling, hybrid FE-SEA method, noise induced vibration

中图分类号:

V41
TB53

林华刚, 闫云聚, 李鹏博. 基于波动耦合的复杂结构动力响应分析与研究[J]. 航空学报, 2015, 36(5): 1530-1538.

LIN Huagang, YAN Yunju, LI Pengbo. Analysis and research of dynamic response of complex structure based on wave coupling[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(5): 1530-1538.

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E-mail：hkxb@buaa.edu.cn

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基于波动耦合的复杂结构动力响应分析与研究

Analysis and research of dynamic response of complex structure based on wave coupling

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