非惯性系下碳纤维轴-钛合金膜盘联轴器动力学特性仿真  

Dynamic Characteristics Analysis of Carbon Fiber Shaft Titanium Alloy Membrane Disk Coupling in Non-Inertial System

作　　者：李恩国 于印鑫 许刘爽 LI En-guo;YU Yin-xin;XU Liu-shuang(School of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Key Laboratory of Intelligent Manufacturing Technology for Advanced Equipment,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500 [2]云南省先进装备智能制造技术重点实验室,昆明650500

出　　处：《航空发动机》2024年第6期88-93,共6页Aeroengine

基　　金：国家自然科学基金(52165014)资助。

摘　　要：针对具有加大跨度和不对中工况的高速转轴的需求,以TC4钛合金膜盘和CF碳纤维轴组成的碳纤维轴-钛合金膜盘联轴器这一新型挠性联轴器为研究对象,基于非惯性系下的弯-摆-轴耦合力学模型,采用Runge-Kutta法对联轴器模态和动态响应进行求解,讨论了中间轴跨度、材料和安装平台的横向旋转对其动力学特性的影响。结果表明:膜盘联轴器安装平台存在转动速度和加速度时,转子系统会产生附加刚度矩阵和阻尼矩阵,引起轴向和径向的耦合振动,在轴向刚度相对与径向刚度较小时,必须考虑平台运动对轴向振动的影响;中间轴跨度每增大100mm会导致各阶固有频率降低约7%,共振响应峰值增大;而中间轴采用碳纤维材料可以明显提高各阶固有频率并减小振动响应峰值;平台的横向旋转在提高共振响应频率的同时也会导致联轴器整体振动偏离静平衡位置,偏移量随中间轴跨度和材料的不同而变化。In view of the demand for high-speed shaft with large span and misalignment,the new flexible coupling composed of titanium alloy membrane disk(TC4 disk)and carbon fiber shaft(CF shaft)is the key component to meet this demand.In this paper,the carbon fiber shaft titanium alloy membrane disk coupling is taken as the research object.Based on the bending pendulum shaft coupling mechanical model in the non inertial system,the Runge Kutta method is used to solve the coupling modal and dynamic response.The influ-ence of the intermediate shaft span,materials and lateral rotation of the installation platform on its dynamic characteristics is discussed.The research results show that the rotor system will generate additional stiffness matrix and damping matrix when the membrane disk coupling installation platform has rotational speed and acceleration,which will cause axial and radial coupling vibration.When the axial stiffness is relatively small compared with the radial stiffness,the influence of platform motion on the axial vibration must be considered;The increase of the span of the intermediate shaft will lead to the decrease of the natural frequencies of each order and the increase of the peak resonance response;The intermediate shaft made of carbon fiber can obviously increase the natural frequencies of each order and reduce the peak vibration response;The lateral rotation of the platform will not only increase the resonant response frequency,but also cause the overall vibration of the coupling to deviate from the static balance position.The offset varies with the span and material of the intermediate shaft.

关 键 词：膜盘联轴器 碳纤维 钛合金 非惯性系 耦合振动 

分 类 号：V211.24[航空宇航科学与技术—航空宇航推进理论与工程]