摘要
结合子结构建模理论,提出了子结构频率响应分析方法,快速求解频率响应模型。通过对比简支梁振动特性的理论解析解、传统频率响应数值解与子结构频率响应数值解,验证了子结构法的准确性。针对某车型后悬置安装点的噪声传递函数140~160 Hz的峰值问题,应用子结构分析方法提出优化前副车架方案,对比传统频率响应分析方法,仿真计算效率提升了94%,仿真与试验结果表明,车内声响应在140~160 Hz内峰值下降了8~10 dB(A)。
Based on the substructure modeling theory, this paper proposed the substructure frequency response analysis method, which can quickly solve frequency response model. By comparing the theoretical analytical solution, numerical solution of traditional frequency response as well as numerical solution of structural frequency response, correctness of this substructure method was verified. For the peak value of 140-160 Hz of noise transfer function at the rear suspension mounting point of a vehicle, substructure analytical method was applied to propose the front frame optimization solution. Compared with traditional frequency response analytical method, efficiency of simulation calculation was improved by 94%. The simulation and test results show that interior acoustic response is reduced by 8 to 10 dB （A） in the peak frequency of 140 to 160 Hz.
出处
《汽车技术》
CSCD
北大核心
2017年第8期59-62,共4页
Automobile Technology
基金
广东省产学研结合项目(2013B09040002)
广东省引进创新科研团队专项(201001N0104818165)
关键词
子结构
简支梁
前副车架
传递函数
Substructure, Simply-supported beam, Front subframe, Transfer function
