单级人字齿轮减速器振动噪声影响因素研究

本文以船用人字齿轮减速器为研究对象，依据人字齿轮传动结构特点，综合考虑齿轮时变啮合刚度、误差等激励以及人字齿轮轴向定位与滑动轴承支撑等因素，建立了传动系统弯-扭-轴耦合动力学模型，通过求解得到了传动系统轴承动载荷。以轴承动载荷为激励，采用FEM/BEM方法计算了齿轮箱噪声辐射，得到了齿轮箱声场声压分布云图与各场点噪声谱。系统讨论了人字齿轮基本参数(包括齿顶高系数、顶隙系数、齿宽、螺旋角及压力角)以及减速器结构特征（人字齿轮中间连接刚度、轴向定位刚度）对减速器振动噪声的影响，为减速器的减振降噪设计提供了理论基础。

Vibration and Noise Characteristics of The Herringbone Gear Transmission System

According to the structure characteristics of herringbone gear transmission，the dynamic response of the gearbox is researched in consideration of the excitation (such as: time-varying mesh stiffness, gear errors), herringbone gears axial positioning and sliding bearing. The model is solved by using the Newmark integrals method, then the time history of system dynamic force is obtained. Taking bearing force as excitations the gearbox noise radiation characteristics are researched. The distribution of sound pressure and frequency spectrum for noise of the field points are obtained, then the spatial distribution and frequency components of the noise are analyzed. The effect of the gear parameters (including helical angle, face width, addendum coefficient, tip clearance coefficient and pressure angle), connection stiffness of left and right sides of herringbone gears and axial support stiffness on the gear reducer noise radiation are discussed. The study provides useful theoretical guideline to the design of the gearbox.