大功率船用齿轮箱传动系统和结构系统耦合特性分析

Analysis of coupling characteristic of transmission and structure system of large-power marine gearbox

船用齿轮箱是船舶轮机系统的重要组成部分,其动态性能的好坏直接影响系统的性能,因而开展船用齿轮箱动态特性研究具有重要的意义。文章对某大型船用齿轮箱的固有特性进行分析,通过轴承支撑把传动子系统和结构子系统两者耦合起来,建立齿轮—转子—轴承—箱体耦合系统动力学模型。采用有限元软件中的Lanczos方法对齿轮箱系统固有特性进行了计算,得到固有频率及其振型,通过分析齿轮系统的激励频率,得出传动级离合器齿轮在工作过程中造成了较大的振动和噪音,与实际相符。

The research on dynamic characteristics of the gearbox is of great significance to the marine engine system.In this paper,the natural characteristic of large marine gearbox is investigated.A coupling system（gear-rotor-bearing-box） dynamics model is established by coupling transmission subsystem and structure subsystem with the support of bearing.By using Lanczos method,natural frequencies and vibration models are obtained.By the analysis of caparisoning the gear wheel excitation frequencies with the result,it is proved the fact that transmission stage clutch gear causes large vibration and noise in its operation,which matches practical case.