基于快速多极子边界元法的齿轮箱声场分析  

Sound field analysis of the gearbox based on fast multipole boundary element method

作　　者：刘学良 冯治恒 吴海军[1] 莫蓉 LIU Xueliang;FENG Zhiheng;WU Haijun;MO Rong(State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;Guangxi LiugongMachinery Co.,Ltd,Liuzhou 545007,Guangxi,China)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]广西柳工机械股份有限公司,广西柳州545007

出　　处：《声学技术》2021年第6期743-749,共7页Technical Acoustics

摘　　要：齿轮箱是广泛应用的工程机械零部件,准确地模拟其辐射声场对后续的降噪优化设计有着重要作用。边界元方法非常适合分析此类无限域下的声辐射问题。但传统边界元方法有着计算效率低、内存占用高的缺点。该研究发展了宽频的快速多极子边界元方法,并运用该方法计算了齿轮箱在特定频率下的场点声压以及辐射声场。通过对比商用软件的分析结果,验证了所提快速边界元方法的准确性。此外,运用多核并行计算方法,对计算量较大的扫频分析进行加速计算,最终快速、准确地获取了齿轮箱辐射声场的扫频结果。The gearbox is a key component widely used in construction machinery,and the accurate simulation of its radiation sound field plays an important role in subsequent noise reduction optimization design.The boundary element method(BEM)is very suitable for analyzing the acoustic radiation problem in the infinite domain.But,the conven-tional boundary element method(CBEM)has the disadvantages of low computational efficiency and high memory consumption.In this study,a wideband fast multipole boundary element method(FM-BEM)is developed and used to calculate the sound pressures at certain field points and the spatial distribution of the radiation sound field of gearbox at a certain frequency.By comparing the computational results of commercial software,the accuracy of the FM-BEM is verified.Moreover,the multi-core parallel computing method can accelerate the frequency sweeping analysis to ob-tain the frequency sweeping results of the radiation sound field of gearbox quickly and accurately.

关 键 词：边界元法 快速多极子方法 辐射声场 齿轮箱 

分 类 号：O422.2[理学—声学]