Research of transfer path analysis based on contribution factor of sound quality

Abstract

Transfer Path Analysis (TPA) can accurately and effectively determine the composition of the structural vibration transfer path and its impact on the interior noise. To further explore the effect of structural paths on the sound quality in the car, a GA-BP sound quality prediction model was established. By introducing the Sound Quality Contribution Factor (SQCF), the contribution of structure noise transmission path to irritability and the influence of masking effect on sound quality was more intuitively reflected. Aiming at the contribution, a two-level optimization scheme is adopted, and a genetic algorithm is used to determine the target transfer function corresponding to the target irritability value, and then the target path suspension static rigidity is further matched. The results show that the engine suspension optimization scheme based on the sound quality contribution factor can effectively improve the interior sound quality and reduce the contribution of the structural path to the irritability.