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本文分析了小四轮拖拉机的噪声源,发现排气噪声和铜板机壳的辐射噪声是最大的噪声源,用传递矩阵法设计了排气消声器,并采用了隔振器使铜板机壳的辐射噪声降低。试验表明,拖拉机噪声得到了有效控制。
This paper analyzes the noise sources of small four-wheel tractors and finds that the exhaust noise and the radiation noise of the copper shell are the largest noise sources. The exhaust muffler is designed by the transfer matrix method and the vibration isolation of the copper shell is adopted Noise reduction. Experiments show that tractor noise is effectively controlled.