极端环境模拟装置在考虑温度影响的起落架落震性能研究中的应用  

Application of Extreme Environment Simulation device in Research of Landing Gear Drop Shock Performance Considering Temperature Effect

作　　者：张飞[1] 王彬文[1] 杨正权[1] 陈熠 杨建波[1] 朱晨辰 王聪 刘成龙 ZHANG Fei;WANG Binwen;YANG Zhengquan;CHEN Yi;YANG Jianbo;ZHU Chenchen;WANG Cong;LIU Chenglong(Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics,Aircraft Strength Research Institute of China,Xi'an 710065,China;AVIC The First Aircraft Institute,Xi'an 710089,China)

机构地区：[1]中国飞机强度研究所结构冲击动力学航空科技重点实验室,西安710065 [2]航空工业第一飞机设计研究院,西安710089

出　　处：《机械科学与技术》2025年第2期373-380,共8页Mechanical Science and Technology for Aerospace Engineering

摘　　要：以某型飞机前起落架为研究对象,进行高低温环境下起落架落震性能试验研究。为了模拟落震试验所需的极端高温和低温环境,设计研制了极端环境模拟装置,利用其对全尺寸起落架进行加热/降温。在不同环境温度下开展了起落架高低温落震试验,对比研究了高温和低温环境对起落架落震性能的影响。结果表明:随着环境温度自-55℃升至70℃,起落架缓冲系统的空气弹簧刚度逐渐变大;低温环境对该型起落架缓冲器内部的油液阻尼力影响较明显,而且极端的低温环境会导致起落架缓冲支柱摩擦力增大,压缩行程缩短;高温环境主要影响缓冲器内部的空气弹簧刚度,温度越高,空气弹簧刚度越大,支柱不易被压缩。In this paper,the landing gear of an aircraft is taken as the research object,and the landing gear drop performance is studied under high and low temperature environment.Firstly,in order to simulate the extreme high temperature and low temperature environment required with the drop test,the extreme environment simulation device is designed and developed to heat/cool the full-size landing gear.And then,the high and low temperature drop test of landing gear is carried out under different ambient temperatures.The effects of the high temperature and low temperature environments on the landing gear drop performance are highlighted.The results show that with the ambient temperature rising from-55℃to 70℃,the air spring stiffness of the landing gear buffer system increases gradually.The low temperature environment has obvious influence on the oil damping force inside the landing gear buffer.The extreme low temperature environment will lead to the increase in friction force of the landing gear shock absorber and cause the shorter compression stroke of the buffer strut.The high temperature environment mainly affects the stiffness of the air spring inside the shock absorber.The higher the temperature is,the greater the air spring stiffness of the shock absorber is,and the buffer strut is not easy to be compressed.

关 键 词：起落架 落震性能 落震试验 环境温度 极端环境模拟装置 

分 类 号：V226[航空宇航科学与技术—飞行器设计]