摘要
针对某SRV车,建立了白车身有限元模型和声学边界元模型。对声固耦合和非耦合时驾驶员右耳的声压频率响应特性进行分析,结合模态分析找出关注频率。在这些频率下进行面板贡献量分析,找出了主要的正负贡献面板。对白车身进行速度频率响应分析,找出振动腹部的节点;运用加权系数法,建立与节点速度和场点声压有密切关系的目标函数。在此基础上,提出一种通过优化板件厚度降低结构振动速度,间接控制车内噪声的方法。
To a certain vehicle, FE model of the BIW （body-in-white）and BE model of acoustic cavity are built. The focused frequencies are found by calculating coupled and uncoupled sound field frequency response combined modal analysis.The mainly positive or negative contribution panels are found by analyzing panel contribution at those focused frequencies.The nodes of the belly of vibrating are found by velocity frequency response analysis of the BIW,then the target function which connected with the nodes velocity and field point pressure is established by using weight coefficient method. On this basis,a method is put forward that is reducing vibration by optimizing panel thickness for the sake of controlling in-car noise indirectly.
出处
《汽车科技》
2011年第5期27-31,41,共6页
Auto Sci-Tech
基金
安徽省级科技创新团队计划资助项目(2006KJ010TD)
安徽省重点实验室人才基金资助项目(070234E2)
关键词
间接边界元法
声固耦合
面板贡献量
优化
indirect BEM
acoustic-structural coupling
panel contribution analysis
optimization
