弧齿锥齿轮箱动态特性分析及辐射噪声预估

以升船机同步系统用弧齿锥齿轮箱为研究对象,综合考虑锥齿轮副刚度激励、误差激励和啮合冲击激励等内部动态激励,建立了包含弧齿锥齿轮副、传动轴、轴承和箱体等的齿轮系统动力有限元模型,采用ANSYS对齿轮系统进行动态响应分析,得到齿轮箱的振动位移、振动速度及振动加速度;以箱体表面节点振动位移为边界激励条件,在SYSNOISE中建立箱体声学边界元模型,采用直接边界元法进行辐射噪声预估,得出箱体表面的声压云图及场点的辐射噪声。结果表明:齿轮箱动态响应及辐射噪声的峰值频率均出现在啮合频率及其倍频处。

Analyzing Dynamic Characteristics of Spiral Bevel Gearbox and Predicting Its Radiation Noise

Considering the internal dynamic excitation of a spiral bevel gearbox in the synchronization system of a ship lift such as stiffness excitation,error excitation and meshing impact excitation,we established the dynamic finite element model of the gearbox that includes meshing spiral bevel gears,transmission shafts,bearings and gearbox houses.The dynamic response of the gearbox is analyzed through using ANSYS,and consequently the displacement,speed and acceleration of the gearbox are obtained.Based on SYSNOISE,an acoustic boundary element model of the gearbox is built by using the boundary conditions such as a node′s vibration displacement from housing surface.Then radiation noise prediction is carried out through the direct boundary element method,and the surface acoustic pressure contour on the housing surface and the radiation noise at determined field points is obtained.The results indicate that the peak values of dynamic response and radiation noise of the gearbox both appear at meshing frequency and its octave frequencies.