含弹性支撑的船用减速器箱体动态特性

Vibration analysis of marine planetary reducer with elastic support

摘要:

为分析弹性支承对船用减速器动态特性的影响,提高其动态性能,综合考虑齿轮时变啮合刚度、齿轮偏心误差及啮合误差等因素的影响,依据各零件作用力传递关系,建立传动系统动力学模型,计算系统动态激励．采用有限元法构建齿轮箱稳态动响应分析模型,应用弹簧单元对其底部支撑进行模拟,依据自编制动响应求解流程,对齿轮箱在系统动激励作用下的稳态响应进行求解,得到齿轮箱节点振动加速度响应时域历程及其频谱．引入齿轮箱隔振系统频率比概念,分析支撑刚度对齿轮箱振动传递及倾斜变形的影响,发现当频率比为2～3时可达到较好的支撑效果,为齿轮箱的设计提供了理论依据．

Abstract:

In order to analyze the dynamic effects of elastic support on dynamic characteristics of marine planetary reducer, the dynamic model of transmission system is set up in consideration of the time-varying mesh stiffness and gear error, and the dynamic excitations of the system are calculated. The dynamic response model of the gearbox is set up by using finite element method and solved by using mode superposition method. Then the time history and spectrum of node acceleration of the gearbox are obtained, and the effect of support stiffness on vibration transfer and displacement of the gearbox are researched. The study provides useful theoretical guideline to the design of the marine gearbox.