多轮多支柱飞机地面低速转弯能力研究

Study on Aircraft Low Speed Steering Capability of Multi-tire and Multi-strut Landing Gear

相对于传统的前三点式飞机,大型多轮多支柱起落架构型飞机地面滑跑转弯时,各支柱及各轮胎动态协调分配载荷,多传力路径使得分析计算异常复杂。应用弹性力学轮胎特性,建立全机转弯数学模型,结合轮胎摩擦及扭转试验数据,计算了多轮多支柱飞机低速地面转弯能力,通过物理试验同虚拟仿真的结合与修正,开展了复杂构型下起落架地面低速转弯时载荷特性分析,重点分析了在干燥水泥道面与湿滑水泥道面上,该构型飞机最大转弯能力和转弯半径,并阐述了多轮多支柱飞机大角度转弯时轮胎磨损程度判别方法。

Compared with the traditional front three-point aircraft,when the large aircraft with multi wheel and multi strut takes off and turns on the ground,each pillar and each tire dynamically distribute the load,and the multi force transmission path makes the analysis and calculation extremely complex.This paper introduces a method to establish the whole aircraft turning mathematical model by using the tire characteristics of elasticity,combined with the tire friction and torsion test data,The calculation method of low-speed ground turning capacity of multi wheel and multi pillar aircraft is formed.Through the combination and correction of physical test and virtual simulation,the load characteristics of landing gear during low-speed turning on the ground under this complex configuration are analyzed,focusing on the maximum turning capacity and turning radius of the aircraft under this configuration on dry cement pavement and wet cement pavement.The discrimination method of tire wear degree of multi wheel and multi pillar aircraft during large angle turning is described.