时域传递路径分析在车内噪声优化中的应用

The Application of Time Domain Transfer Path Analysis in Vehicle Interior Noise Optimization

时域传递路径分析/合成技术是一种基于时域多输入系统合成车内噪声的技术,在车内噪声问题识别与优化上已经得到广泛的应用。与传统频域TPA相比,时域TPA在传递路径模型中丰富了隔振元件主被动端传递路径信息,为可听的修改预测提供更多选择;其时域拟合结果可进行回放,经过后处理可进行多种声学性能分析。文章对时域传递路径分析的基本原理与建模方法进行介绍,利用时域传递传递路径分析技术对某开发中车型建立排气系统结构传递路径模型,并识别出由排气吊钩共振引起的车内轰鸣声,结合修改预测并在样车上进行验证,为整车子系统引起的噪声问题识别与优化提供一套完整的方案。

Time Domain Transfer Path Analysis is the method to synthesis vehicle interior noise which is based on multi-input system. Currently time domain TPA has been widely applied in the problem of automotive interior noise trouble shooting and optimization, which behaves more straight forward and convenient than traditional frequency domain TPA in the field of modeling and adjusting the audible predication. Using time domain TPA to recognize the vehicle interior noise caused by the resonance of the exhaust hook for a developing car type is discussed in this paper. Furthermore, the paper goes into the detail of how to adjust the predication value in order to recognize the problem path, how to verify and validate the result on the real car, and providing a creative idea for the optimization and recognition problem of the sub-system of the car.