Abstract:

In this paper， the generation mechanisms of vehicle leak noise and its research methods are summarized， and the dynamic wind tunnel interior?noise test and static body sound?insulation test are carried out respectively on the test vehicle. During the tests， the tape sealing method is used to analyze the contributions of seals in different positions， including doors， side windows， skylights and windshield etc.， to the dynamic and static leak noise was analyzed， and the leak noises generated by different mechanisms are separated. The results show that cavity noise and aspiration noise are the main components of vehicle leak noise， and active seal structure has greater contributions to the leak noise.

Key words: leak noise, wind tunnel test, seal structure, sealing contrast method, aspiration noise