微型车表面声强特征的试验研究

Test Research on Sound Intensity Characteristic of Minibus Surface

该文为整车降噪的前期工作,从分析声强测量技术的原理出发,有针对性地选择微型车表面声强的测量条件、测量方法,分析了测量过程与结果。利用声强叠加原理,合成每一测点的总声强,并通过表、图点、等声强线等方法对车身表面声强进行描述;根据测量结果,分析了引起微型车表面噪声的原因,分离出引起车外噪声的主噪声源;根据分析结果,最后提出了降低微型车车外噪声的方法和途径。

This is the prior work of the automobile noise reduction. The test principle of SI （ sound intensity） technology is analyzed and the test condition and the method of the minibus surface SI are chosen. The test process and results are analyzed. By using the additive principle of SI, the whole SI of the single test point is composed. By the is expressed. According to the test results, the sources are separated. The techniques of reduc methods of table, figure and contour, the surface SI minibus noise cause is analysed, and the main noise ing the minibus surface noise are given.