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从弹性动力学的观点出发对齿轮结构进行了动力特性分析,得到了不同材料齿轮结构在不同流体介质中的固有频率和固有振型,并应用声学理论,结合瑞利-里兹方法及声学理论,计算模拟了齿轮结构在轴向激励作用下所辐射的声功率等声学特性,给出了齿轮结构声功率随圆频率、激励力、齿轮厚度,以及阻尼比等参数的变化规律,从而可以定量预估齿轮结构自鸣噪声。在此基础上利用遗传优化算法对影响齿轮减速器辐射声场的各参数进行了低噪声优化,给出了低噪声下各参数的最优值,对齿轮结构的动力学设计、减振降噪和噪声控制具有重要意义。
From the point of view of elastic dynamics, the dynamic characteristics of the gear structure are analyzed. The natural frequencies and natural modes of gear structures of different materials in different fluid media are obtained. Based on the acoustic theory and the Rayleigh-Leitz method and acoustic theory , The acoustic characteristics such as the acoustic power radiated by the gear structure under the axial excitation are calculated and the variation rules of the acoustic power of the gear structure with the parameters such as the circular frequency, the excitation force, the gear thickness and the damping ratio are given. Estimated gear structure self-muted noise. Based on this, the genetic algorithm is used to optimize the low noise of each parameter affecting the radiation field of the gear reducer. The optimal values of the parameters under low noise are given. The dynamic design of the gear structure, vibration and noise reduction and Noise control is of great importance.