噪声与振动控制Issue(5)：64-66,76,4.DOI:10.3969/j.issn.1006-1335.2013.05.014
基于单一源求逆法的排气噪声对车内噪声贡献量分析
Analysis of Exhaust Noise Contribution to Vehicle’s Interior Noise Based on Single Path Inversion
摘要
Abstract
Analysis of noise transfer path from exhaust noise source to vehicle’s interior position was carried out based on exhaust volume acceleration estimation using single path inversion method. The acoustic transfer function from the exhaust outlet to the vehicle’s internal objective points was tested, and the noise contribution of the exhaust to the internal noise was calculated. It was found that the exhaust noise with the second order excitation frequency at the engine speed 1730rpm is the main noise source of the vehicle’s interior noise, and the high sound pressure level of the interior noise is induced by the overlarge volume acceleration of the exhaust instead of the transfer path function from the exhaust orifice to vehicle’s interior objective points. Thus, to reduce the exhaust noise, the exhaust silencer should be optimized. By measuring and comparing the sound pressure levels at driver’s right ear with and without exhaust noise insulation respectively, this conclusion was validated.关键词
声学/单一源求逆法/排气噪声/传递路径/贡献量分析Key words
acoustics/single path inversion/exhaust noise/transfer path analysis/contribution analysis分类
交通工程引用本文复制引用
徐猛,张俊红,李基芳,何伟举,翟乃斌..基于单一源求逆法的排气噪声对车内噪声贡献量分析[J].噪声与振动控制,2013,(5):64-66,76,4.基金项目
国家自然科学基金(基金编号50975192）；高等学校博士学科点专项科研基金（基金编号20090032110001）。 （）
