基于半消声室系统台架的发动机冷却风扇噪声问题研究

Engine Cooling Fan NVH Optimization on the Basis of Semi-anechoic Chamber System Bench Work

论文阐述了如何在半消声室内运用试验台架并结合整车测试,解决发动机冷却风扇噪声问题。通过对冷却风扇叶片形式、护风圈、框架、安装密封、转速等方面的优化,使整车NVH性能有了明显提高。说明基于半消声室的台架试验,能够实现部件在装车前进行试验验证,利于设定系统目标,指导设计,简化测试过程,对提升整车NVH性能有重要意义。

It focuses on how to solve engine cooling fan noise problem by using semi-anechoic chamber system bench work and vehicle test.This paper discusses the blade shape, fan shroud, fixed frame, rotate speed, mode and other aspects to optimize vehicles NVH performance.The test based on semi-anechoic chamber can not only verify vehicle parts before they were assembled, but also be helpful to set system tar-gets, guide design, and simplify test process, which plays an important role in improving the vehicle NVH performance.