摘要
减速器箱体的减振降噪一直是工程应用时需要重点考虑的方面,基于声学贡献度分析原理,提出一种振动噪声控制方法。建立了减速箱有限元模型并计算其结构模态,将减速箱有限元网格作为结构网格和声学边界网格,根据边界元法求解真实工况激励下的辐射声场。利用声学贡献度分析,找到贡献度最大的面板,修改结构设计参数,从而获得最优的结构设计。最后,根据减速箱的声学面板贡献度分析结果进行结构修改,使得声场中某点噪声峰值明显降低。
A noise control method for a gear box structure is proposed which is based on panel acoustic contribution analysis. A gear box FEM model is established and the structural mode is calculated. Adopting the FEM mesh as structural mesh and acoustic boundary, we determined the radiation sound field under actual load by BEM method. In order to determine the different contributions of different panels, panel acoustic contribution analysis （PACA） is carried out. Then structural modification is performed to the most contributing structural area. A technical application demonstrates the validity of the method. The new and modified model leads to obvious reduction of sound pressure level.
出处
《机械科学与技术》
CSCD
北大核心
2009年第12期1541-1545,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家863高技术研究发展计划项目(2006AA04Z120)资助
