Abstract: In order to study the influence of the structure of the front windshield trim strip on the wind noise performance of the vehicle in high-speed driving, PowerFLOW and PowerACOUSTICS were used to calculate and analyze the wind noise performance under three conditions of installing grooved trim strips, solid trim strips and uneasy trim strips. The models with 10 mm, 20 mm, 30 mm, and 40 mm front windshield trim widths were respectively analyzed, and the influence of the trim structure and width on the wind noise of the car was studied. The analysis results show that the car's front windshield trim can slow down the impact of airflow on the A-pillar and reduce the eddy current intensity, thereby reducing the intensity of wind noise and improving the wind noise performance of the car; the improvement is most obvious; a solid trim strip with a width of about 30 mm is most beneficial to the wind noise of the car.

Key words: Wind noise; NVH; Aerodynamic noise; Front windshield trim; PowerFLOW; Power ACOUSTICS

摘要： 为了研究汽车在高速行驶中前风挡饰条结构对汽车风噪性能的影响，运用 PowerFLOW、 PowerACOUSTICS 对某车型安装槽型饰条、实心饰条、不安装饰条 3 种条件下风噪性能进行 计算分析，并分别对装配 10 mm、20 mm、30 mm、40 mm 前风挡饰条宽度的车型分析，研究 饰条结构和宽度对汽车风噪的影响。分析结果表明，汽车的前风挡饰条可以减缓气流对 A 柱 的冲击，降低涡流强度，从而降低风噪噪声源强度，改善汽车的风噪性能；实心形式的前风 挡饰条对汽车风噪性能改善最明显；宽度为 30 mm 左右的实心饰条对汽车的风噪最有利。

关键词: 风噪；NVH；气动噪声；前风挡饰条；PowerFLOW；PowerACOUSTICS