载货车辆噪声源识别的试验研究

【摘要】 针对某载货汽车车外加速噪声超过法规限值的情况,运用声强测试和频谱分析相结合的方法,识别其主要噪声源。根据噪声源识别结果对其排气系统进行改进,改进后车外噪声有一定程度的降低,由此表明噪声源识别结果正确、改进设计合理,并证明了此种噪声源识别的方法是可行的。更多还原

【Abstract】 Aiming at the situation that the outside acceleration noise of a certain truck exceeds the limit, the article uses sound-intensity measurement and spectrum analysis method to identify the main noise source. Based on the identification result, the exhaust system is improved and the outside noise is lowed in a certain degree after the improvement. Thus it proves that the noise source identification result is right and the improvement design is reasonable, as well as the feasibility of the identification method.更多还原