关键词: 新能源商用车；关门声品质；评价指标

Abstract: This research focuses on the optimization of door closing sound quality during the development phase of the new energy commercial vehicles. By combining theoretical analysis with experimental research, it first deeply analyzes the generation mechanism of door closing sound. It explores the complex processes of vibration caused by the collision between the door and the vehicle body and propagation of sound waves, and clarifies the influence mechanisms of various components and the vehicle interior cavity on sound characteristics. Then it evaluates the door closing sound by integrating subjective and objective evaluation methods. The subjective evaluation involves scoring based on the auditory sensations of professional and ordinary personnel, while the objective evaluation relies on measuring physical parameters such as sound pressure level and frequency spectrum. Through measures such as adding damping pads to the sheet metal, softening the hardness of the door lock buffer block, and changing the door seal strip to a double-bubble tube structure, the door closing sound quality has been significantly improved. The research results provide highly valuable guidance for the development of new models of new energy commercial vehicles, and help to promote the progress of the industry in the quality of vehicle acoustics, and improve the competitiveness of the product market and user satisfaction.

Key words: new energy commercial vehicle; door closing sound quality; evaluation index