考虑轴承间隙的液弹阻尼器阻尼性能预测模型及求解  

The Damping Performance Prediction Model and its Solver for Fluidlastic Damper Considering the Bearing Clearance

作　　者：周文 雷少保 林展 覃海鹰[1] ZHOU Wen;LEI Shaobao;LIN Zhan;QIN Haiying(China Helicopter Research and Development Institute,Jingdezhen 333001,China)

机构地区：[1]中国直升机设计研究所,江西景德镇333001

出　　处：《直升机技术》2023年第1期20-24,共5页Helicopter Technique

摘　　要：液弹阻尼器是一种较为先进的摆振阻尼器,主要为旋翼摆振运动提供阻尼,以防止地面共振等动力学问题。以往的液弹阻尼器仿真模型未考虑轴承间隙的影响,导致阻尼刚度预测值与实测值差别较大,进而增加了旋翼系统动力学安全设计的难度。文章首先将轴承间隙引入到液弹阻尼器阻尼性能预测模型中,然后采用耦合有限差分法的Runge-Kutta积分格式,实现了新模型的精确快速求解。在不同频率和位移幅值下新模型的预测值均与实测值吻合较好,表明该模型及求解方法具有良好的工程实用性。As one kind of the advanced lead-lag dampers,fluidlastic damper mainly provides damping for the blade’s lead-lag motion so as to prevent ground resonance and other dynamic problems.Traditional simulation model of the fluidlastic damper does not consider the influence of bearing clearance,which results in a big difference between the predicted data and measured data of the damping stiffness,and raises the safety design difficulty of the rotor system dynamics.This paper firstly introduced the bearing clearance into the damping performance prediction model for fluidlastic damper,and then used Runge-Kutta integration scheme coupled with the finite difference method to achieve the rapid solution to our new model through programming.The predicted data agreed well with the measured data under different frequencies and displacement amplitudes,showing good practicability in engineering of our model and its solver.

关 键 词：液弹阻尼器 地面共振 RUNGE-KUTTA 有限差分法 

分 类 号：V245.1[航空宇航科学与技术—飞行器设计]