Abstract: In the development of NVH performance,the door closing force requires that the compression load on the sealing strip is as small as possible,while the abnormal sound and wind noise require that it is as large as possible,there is a contradiction among the three about its performance,and the design process of the sealing strip needs to balance the performance. This paper analyzes the influence of the performance of the sealing strip on wind noise,closing force and abnormal sound,and studies the changing process of the performance requirements of the sealing strip from the performance matrix relationship of the three. The relationship between the radius of the foam tube and the air flow rate is obtained by theoretical calculation. A design scheme and corresponding control strategy for the sealing strip with active variable compression are proposed,so that the performance of the sealing strip can reach the ideal target value of the three at the same time,further improving the NVH performance of the whole vehicle.

Key words: active variable compression sealing strip, wind noise, door closing, abnormal sound, compression load