起重减速机声振耦合分析与优化

发布时间：2018-03-26 07:35

本文选题：减速机　切入点：轴承支反力　出处：《机械传动》2016年06期

【摘要】：建立了起重机减速机的刚柔耦合动力学分析模型,采用变步长向后积分法求解得到了齿轮副啮合力和轴承支反力,以轴承支反力为振动-声耦合分析的载荷边界条件,在LMS Virtual Lab中建立了包含结构网格、声学网格和场点网格的减速机振动-声耦合分析边界元模型,采用完全法求得减速机的表面和场点声压。以减速机的壁厚为设计变量,减速机的质量为约束条件,场点声压为目标函数,建立了减速机的声学优化模型,采用正态边界交汇优化算法求得最优设计变量。结果表明,优化前后减速机的表面声压峰值均出现在500 Hz的中心频段处,优化后的减速机4个场点声压均有不同程度的减小。
[Abstract]:The rigid-flexible coupling dynamic analysis model of crane reducer is established. The gear pair meshing force and bearing supporting reaction force are solved by the variable step backward integral method. The bearing supporting reaction force is taken as the load boundary condition of vibration-acoustic coupling analysis. The vibration-acoustic coupling analysis boundary element model of reducer with structural mesh, acoustic grid and field point grid is established in LMS Virtual Lab. The sound pressure on the surface and field point of the reducer is obtained by using the complete method. The wall thickness of the reducer is taken as the design variable. The acoustic optimization model of the reducer is established by using the mass of the reducer as the constraint condition and the sound pressure of the field point as the objective function. The optimal design variables are obtained by using the normal boundary intersection optimization algorithm. Before and after optimization, the peak of the surface sound pressure of the reducer appears at the center frequency band of 500 Hz, and the sound pressure of the optimized reducer at the four field points decreases to some extent.
【作者单位】：唐山学院机电工程系;
【分类号】：TH132.46

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