Door Seal Failure Analysis Based on Internal and External Pressure Difference of Vehicle Driving Condition

Abstract:

The air pressure difference inside and outside the vehicle increases significantly with the increase of vehicle speed， which affects the vehicle seal and leads to an increase in the risk of door seal failure. Once the seal fails， it will produce a strong air suction noise which destroys the sound quality in the vehicle . In this paper， through wind tunnel experiments and simulations， the pressure difference distributions between both sides of the door seal at different vehicle speeds and yaw angles were obtained as input conditions. The finite element simulations of door and door sealing strip were conducted respectively. The door deformation and the sealing strip deformation under the action of the pressure difference were considered comprehensively， and the failure situation was analyzed based on the contact width of the sealing strip and the door sheet metal. The results show that the reduction of pre-compression of the sealing strip caused by door deformation and displacement is the main reason for seal failure.

Key words:vehicle sealing;door sealing strip;seal failure;suction noise