关键词: 驾驶室内噪声；进气噪声；排气噪声；传递路径；频谱分析

Abstract: The purpose of this paper is to reduce the cab noise of light duty trucks. Based on subjective evaluation, the test objects and items are determined. The main influencing factors of noise and noise reduction measures are determined by combining noise and vibration test data and finite element analysis comprehensive methods. This paper implements noise testing under various intake noise isolation measures for the noise in the cab and intake noise, and conducts modal testing on the intake system components on the vibration transfer path. The analysis of the test data determines the main factors and noise reduction measures of the cab noise, and conducts modal analysis and noise reduction design for the components on the vibration transfer path. The checking test results show that the improved design based on test data analysis and finite element analysis effectively reduces the noise in the cab. The comprehensive method of noise testing, data analysis, and finite element analysis described in this paper has certain reference and reference significance for reducing noise in the cab.

Key words: cab noise; intake noise; exhaust noise; transfer path; spectrum analysis