1.1.5.1.5 Car body 1.1.5.1.5.1 Function There are many requirements for vehicles, especially vehicles in motion. The emphasis here is on the other main components that cause noise in the vehicle. However, the body is one of the most important parts involved in NVH. The components described here specifically refer to the place where vibration or noise is generated according to Function. The car body contains or associates all these components. The car body produces not only air noise but also solid noise. The car body must be able to absorb vibrations from all parts and try not to spread these vibrations into the car body.
The main performance parts of NVH in the car body are the roof steel plate, side wall and floor. Due to its structure, when the vibration or noise is transmitted here, it will be greatly enhanced, like a loudspeaker. 1.1.5.1.5.2 Higher requirements on the body Very good fall or crash performance. The interior is spacious. preservative. Light weight. Very good aerodynamic shape.
Because sometimes these requirements cannot be met at the same time, only a compromise can be adopted.For example, in order to meet the NVH performance, it is necessary to ensure the overall rigidity of the car body as much as possible, as well as the good buffering performance in collision, and the car body must be flexible as far as possible. Therefore, only part of the area can be crumpled or bent. Examples: To ensure the water tightness of the car body, but not the noise or vibration requirements at the same time, the following factors must be considered: Install the window correctly. Install the weatherstrip correctly. Other points for attention: All access to the front cabin.
Door and window sealing strip. Heaters and vents. Skylight drain tube. 24 Project Part name Description 1 - The driver is in the "trough" 2 - Rear passengers are at the "crest"