基于Virtual．Lab的客车声-固耦合模态仿真与分析  

Sound-solid coupling modal simulation and analysis of bus based on Virtual.Lab

作　　者：李友真[1] 李彦保[2] 王桂龙[1] 张旭[3] 

机构地区：[1]合肥工业大学机械与汽车工程学院 [2]合肥工业大学交通运输工程学院 [3]上海汽车集团股份有限公司技术中心

出　　处：《客车技术》2013年第4期13-17,共5页Bus Technology

摘　　要：以某客车为研究对象，运用HyperMesh建立了该客车的白车身有限元模型、声学有限元模型及声-固耦合模型；通过OptiStmct进行车身骨架模态分析，获取结构的固有频率和振型等参数，为结构动力特性的优化设计提供依据；最后利用Virtual．Lab进行了声腔模态分析及声-固耦合模态分析。结果显示，低频时耦合模型模态与纯车身声学模型的相应各阶模态非常接近，表明该客车耦合作用力很小，验证了模型结构的合理性，为进一步研究奠定了基础。Take some bus as research object,using HyperMesh to set up white body finite element model, acoustic fininte element model and sound-solid coupling modal of this bus,make body frame modal analysis through OptiStruct,obtain the structure of solid frequency and vibration mode,provide evidence for the optimization design of structure dynamice characteristic,using Virtual.Lab to do acoustic models analysis and sound-solid coupling modal analysis.The consequence shows,the coupling model modal and corresponding each coupling modal of pure body acoustic models are very close when in low-frequency.It shows small coupling reaction of this bus,verify the rationality of model structure,set a foundation for further research.

关 键 词：NVH 模态分析 耦合系统 VIRTUAL LAB 

分 类 号：O324[理学—一般力学与力学基础]