某型轿车路噪性能优化

Optimization of Road Noise Performance of a Certain Sedan Car

某自主品牌轿车在开发过程中,通过主观评价和试验测试,发现在匀速工况下存在路噪大的问题。结合测试结果及相关数据,利用CAE方法对问题产生原因进行分析锁定,提出车身结构和底盘衬套2个方向的优化方案,并进行验证分析。根据分析结果,确定实施底盘衬套刚度优化方案。实车测试显示,优化后车内路噪性能改善明显,与标杆车达到同一水平。整改过程表明,仿真和试验相结合,能够高效排查、解决复杂的整车NVH问题。

In the course of the development of an independent brand sedan car, through subjective evaluation and test, it is found that there is a problem of high road noise in the constant-speed working condition. Based on the test results and relevant data, CAE method is used to analyze and lock the causes of the problem, and two optimization schemes of body structure and chassis mount bush are proposed and verified. According to the analysis results, the optimization scheme of the stiffness of the chassis mount bush is determined. Actual vehicle test shows that the performance of interior noise is improved obviously after optimization, and it reaches the same level as the benchmarking car. The rectification process shows that the combination of simulation and test can efficiently solve the complex NVH problem of the whole vehicle.