不同地面作业工况下起落架动力学建模仿真分析  

Dynamics Modeling and Simulation Analysis of Landing Gear under Different Ground Working Conditions

作　　者：孙艳坤[1] 刘冰 张威[1,2] 

机构地区：[1]中国民航大学航空工程学院 [2]中国民航地面特种设备研究基地

出　　处：《工程机械》2019年第12期61-65,I0018,共6页Construction Machinery and Equipment

基　　金：中央高校基本科研业务费项目中国民航大学专项资助（3122018C006）

摘　　要：以目前先进的起落架无杆牵引系统作为分析主体,通过现场测绘、查阅手册数据和理论公式推导计算,对其进行样机的虚拟建模和仿真。通过缓冲器油液阻尼力曲线的建立和空气弹簧力曲线的建立,更加真实地进行缓冲器仿真;通过各种位置约束、驱动约束和轮胎力的添加和材料的设置得到了Ada ms牵引系统动力学模型;基于无杆牵引系统的虚拟样机模型对不同牵引速度和刹车工况下前起落架牵引载荷和缓冲支柱载荷进行动力学仿真分析。结果表明:前起落架牵引峰值载荷随着牵引速度的增大而增大,而缓冲支柱峰值载荷随着牵引速度增大而减小;刹车过程中随着牵引速度减小,前起落架受到的水平方向载荷和缓冲支柱载荷均发生变化,紧急刹车时水平方向载荷和缓冲支柱载荷相对正常刹车均较大。Advanced landing gears without drawbar have been laid as a subject for analysis that every mean were used and tried before getting an Adams dynamic model for the traction system.Dynamic simulation and analysis have been done of the front landing gears load and load at the cushion posts as based on the traction systems virtual machine model under various traction speeds and braking conditions.The results show that the front landing gears traction load would be greater with increased traction speed,however,the cushion posts peak loading would decrease along with the traction speed increase,which will cause changes to the horizontal loading at the front landing gear,as wewll as to the cushiion posts loading,so that the horizontal load and the load at the cushion post would be greater than the value at normal braking when emergent braking is done.

关 键 词：前起落架 动力学建模 缓冲支柱 牵引载荷 

分 类 号：V226[航空宇航科学与技术—飞行器设计]