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针对汽车传动中齿轮齿面振动引起的噪声的问题,建立了齿轮与齿轮啮合的系统振动模型,同时将模型中的误差量与齿轮齿廓的修形量进行关联,耦合建立出齿轮齿廓在齿顶部分和齿根部分的修形曲线,并搭建齿轮啮合振动系统动态模型的实验平台对振动噪声做进一步分析。通过实验发现齿轮啮合噪声是影响着整体波形的大小和走向的重要因素,修形后的齿轮拟合噪声时域图波形振幅相对于修形前明显减弱,冲击减小趋势显著;同时,对主试箱振动噪声进行实时采集对比修形前后采样的噪声点。验证了系统振动模型和修形方法的可行性,为汽车变速箱降噪的研究提供了参考。
Aimed at the problem of noise caused by gear tooth surface vibration in vehicle transmission, the system vibration model of gear and gear meshing is established. At the same time, the error of the model is related to the modification of gear tooth profile. Tooth top and tooth root part of the shape curve, and set up a dynamic meshing gear vibration system experimental platform for further analysis of vibration and noise. The experimental results show that the gear meshing noise is an important factor that affects the size and direction of the overall waveform. The waveform amplitude of the fitted gear noise waveform is significantly weaker than that before the modification, and the impact reduction trend is significant. Meanwhile, The vibration and noise of the test box were collected in real time to compare the sampled noise points before and after modification. The feasibility of system vibration model and shape modification method is verified, which provides a reference for the research of noise reduction of automobile gearbox.