Research on the Characteristics of Body Panels Based on Equivalent Radiated Acoustic Power Method

The NVH performance of the body is one of the most important components of the NVH performance of the vehicle. It is the key system to control the NVH performance of the vehicle. The body is the last link of the transmission system. Almost all vibrations and noises act and reflect on the body and transmit to the passengers. As the system with the largest area on the car body, the panels are easily excited to vibrate and radiate sound. Thus, the rapid identification and control of noise problems are particularly important. Simultaneously, thinning and piercing body sheet metal panels are important directions for lightweight body-in-white, which contradicts NVH performance requirements. Based on the equivalent radiated acoustic power method, the body-in-white model was used for calculation. By analyzing the equivalent radiated acoustic power (ERP) of the body panels and the contribution of ERP, a reasonable structural optimization direction was determined to improve the NVH performance of the panels.