According to the gear dynamic load impact theory and combining the acoustic theory,and the dynamic behavior of a pair of actual gear transmissions is studied,and the noise characteristics radiated by gear meshing transmission is investigated.The computational formula of acoustic pressure and acoustic power radiated from gear transmission are derived;it can be used to accurately calculate the impact noise from gear transmission system.Based on this,the influence of structure parameters,such as gear coxal error,meshing angle,drive gear speed,material and gear width,etc.,on impact noise are discussed,and the change law of impact noise with different parameters are presented.In addition,using intelligent genetic algorithm,the low-noise optimization design for gear reducer transmission is studied,and the optimal value of all structural parameters of the modulus,teeth number,gear width,addendum coefficient,meshing angle,etc.in low and high frequency region are obtained.The maximal radiated noise of the optimized gear transmission is reduced by 3.9 725 dB,and it is 4.99% lower compared with the original system.%从齿轮动载冲击理论的角度出发,分析了一对实际齿轮传动的动态行为,并结合声学理论研究了齿轮传动啮合时所辐射的噪声特性,给出了齿轮传动所辐射的声压和声功率的计算公式,从而可定量的预估齿轮传动系统所辐射的冲击噪声。在此基础上探讨了齿轮轮齿基节误差、啮合角、主动轮转速、材质和齿轮宽度等齿轮结构参数对冲击噪声的影响程度,并给出了冲击噪声随各参数的变化规律。最后利用智能计算的遗传优化算法对减速器齿轮传动系统进行了低噪声优化研究,给出了齿轮的模数、齿数、齿宽、变位系数、啮合角等各结构参数在低频和高频上的最优值,优化后的
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