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履带车的车内噪声是一个严重问题,它使乘员引起听力损失,降低劳动效率,引起各种疾病.本文以履带车车内噪声的调查为基础,利用现有的快速富里哀变换(FFT)分析程序,对车内噪声做了统计学分析.由于履带车车内噪声是随机的、简单的声级测量,只能做为评价整车性能的一种指标;用简单的峰值、相位和频率分析方法分析无规则过程,也是不够严格的;用倍频程或三分之一倍频程所得到的频率结构,其分辨率是低的.因此,为了进一步描述履带车车内噪声
The internal noise of crawler is a serious problem that causes occupant to cause hearing loss, reduce labor efficiency and cause various diseases.This paper based on the investigation of noise inside crawler car, using existing fast Fourier transform (FFT) Analysis program to make a statistical analysis of the noise in the car.As the noise inside the crawler car is random and simple sound level measurement can only be used as an indicator to evaluate the performance of the vehicle.Using simple peak, phase and frequency Analytical methods to analyze random processes are also not strict enough. The resolution of the frequency structure obtained by octave or one-third octave is low, therefore, in order to further describe the noise inside the crawler car