摘要
为了分析运行工况下车内噪声的声源贡献率,以噪声源附近的响应为参考激励,建立了运行工况下车内噪声的传递率模型,研究了车内噪声传递率的测试分析方法,并针对矩阵病态程度随频率变化的具体情况,提出了传递率矩阵的计算方法。通过某重型汽车实车实验对传递率矩阵的计算方法进行了对比和验证,分析了该车车内噪声的声源贡献率。结果表明,建立的车内噪声传递率模型和提出的传递率矩阵计算方法能够用于分析实际车内噪声的声源贡献率,具有易于操作和实现等特点。
In order to analyze the contribution of operational vehicle interior noise sources,the responses near the noise sources are used as reference excitations.An operational vehicle interior noise transmissibility model is built,and the transmissibility test method is investigated.One problem is that the condition number of the reference excitation matrix changes with frequency.In light of this problem,a calculation method of the transmissibility matrix is put forward,then compared and validated with a heavy duty truck test,and the contribution of the truck′s interior noise sources is analyzed.The results show that the transmissibility model and transmissibility matrix calculation method can easily be applied to analyze the contribution of vehicle interior noise sources.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2014年第4期693-698,779,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51275262)
关键词
车辆
噪声
传递率
贡献率
逆问题
vehicle
noise
transmissibility
contribution
inverse problem
