摘要
对履带式车辆内部噪声级和噪声频谱进行了测试,分析了主要噪声源,给出了驾驶室中噪声的空间分布。行驶时车辆内部各点的声压级均大于100 dB(A),在驾驶室中的噪声分布呈现前低后高、上低下高的特性。发动机的噪声辐射及其对车体结构的动态激励是驾驶室中最主要的噪声源,而行走系统对驾驶室内噪声的影响相对次要。倍频程曲线表明,低频处的声压级明显高于中高频处的声压级。
By testing the noise level and spectrum in a track-laying vehicle, the main sources of the noises are analyzed and their distribution in crewman-room is given. The sound pressure at all points in the crewman-room is over 100 dB（A） while the vehicle is running, and the noise distribution is lower in the front and up but higher in the back and down. The two main sources of noise are the radiation from the engine and the dynamic excitation radiated to the vehicle body. The contribution from the moving system to the distribution is relatively weak. The octave spectrum curve shows that the sound pressure is higher at low-frequency band.
出处
《长春工业大学学报》
CAS
2008年第5期562-565,共4页
Journal of Changchun University of Technology
关键词
履带车辆
噪声
倍频程频谱
track-laying vehicle
noise
octave spectrum.
