Optimization of Front Windshield Lower Beam Welding Assembly Based on NVH Performance

摘要

To meet the need of pedestrian protection and ensure the vehicle has good energy absorption when the head hit the windshield, the front windshield lower beam welding assembly was required to be designed open section. As a result, the vibration of the front windshield and firewall became strong, and the interior booming noise problem could be caused. In order to solve this problem, the simulation method was carried out to optimize the booming noise in this paper, the vibration of the front windshield and firewall was reduced by enhancing the windshield support structure, and meanwhile, the noise transfer function was improved. The improved solution was validated in real vehicle. The test also shows that enhancing windshield support structure can effectively improve the high-speed booming noise.