Low-resistance and low-noise collaborative design optimizing method of vehicle body

The invention provides a low-resistance and low-noise collaborative design optimizing method of a vehicle body. A low-resistance and low-noise vehicle body design is realized by collaborating vehicle body modeling parameter control. The method comprises the following steps of simplifying the vehicle body to be optimized; controlling characteristic parameters and restrictions which can reflect the modeling of the vehicle body; building an approximate model of influence relations between vehicle body modeling parameters and pneumatic resistance performance as well as between vehicle body modeling parameters and pneumatic noise performance; according to different vehicle models, designing influence weight factors of pneumatic resistance and pneumatic noise; optimizing the vehicle body by using the collaborative optimizing principle in multiple subjects, thus obtaining better vehicle body modeling parameters, so that a low-resistance and low-noise dual-purpose design is realized on the basis that the beauty modeling style of the original vehicle model is kept to the greatest extent. By the design method provided by the invention, the aim that only reduction to the pneumatic resistance or the pneumatic noise is considered in the current vehicle body is single is overcome, the design level of the vehicle body can be improved, and the method is simple, reliable and convenient to perform.