噪声与振动控制2016，Vol.36Issue(5)：50-55,6.DOI:10.3969/j.issn.1006-1335.2016.05.011
受路面随机激励作用车室低频耦合轰鸣声分析
Analysis of Low Frequency Coupled Booming of Passenger Compartments Induced by Road Random Excitation
摘要
Abstract
To analyze the low frequency booming of the passenger compartments under road random excitation, the time domain model for road random-excitation simulation is established using white noise filtering method. Based on Lagrange principle, a 7-DOF dynamic model for the whole vehicle is set up. The simulation model for suspension excitation force caused by the road random excitation is built by means of Matlab and the amplitude frequency spectrum of the suspension excitation force is obtained by FFT method. A structural FEM for vehicle body and an acoustic FEM for interior cavity are established using Hypermesh. Structure modal analysis and cavity acoustic modal analysis are computed by using Nastran and Virtual.Lab. Then, the structure-acoustic coupling system modals are computed through modal superposition method. Finally, the coupled acoustic response analysis based on the modals is performed by applying the suspension excitation force load. The analysis results indicate that in the frequency range of 20 Hz-50 Hz, the road random excitation has a large contribution to the low frequency booming of the passenger compartments. The coupled system modals dominated by structure deformation can readily lead to low-frequency booming in the passenger compartments under the road random excitation.关键词
声学/声固耦合/低频轰鸣声/路面随机激励/车室Key words
acoustics/structure-acoustic coupling/low frequency booming/road random excitation/passenger compartment分类
通用工业技术引用本文复制引用
李苏平,胡启国,胡海波,罗天洪..受路面随机激励作用车室低频耦合轰鸣声分析[J].噪声与振动控制,2016,36(5):50-55,6.基金项目
重庆市基础科学与前沿技术研究专项重点资助项目（cstc2015jcyjBX0133）；国家自然科学基金资助项目 （）
