摘要
为了研究环境温度对起落架缓冲性能的影响,以某型飞机起落架为研究对象,考虑温度对起落架动力学模型中空气弹簧力和油液阻尼力的影响,提出了一个包含温度效应的起落架动力学分析模型,并通过试验在一定温度范围内(-35℃~60℃)进行了验证。结合试验数据和仿真模型给出了空气多变指数、油液阻尼系数的设计指导值,并研究了温度对起落架缓冲性能的影响规律。结果表明:环境温度对起落架缓冲性能影响显著,表现为起落架落震动载荷的变化;同时发现缓冲器腔内气体较油液受温度影响更为敏感,低温状态时气压的变化以及油液物理状态的改变会使得缓冲器性能明显恶化,缓冲支柱行程变化率达到25%;对于可能工作在复杂环境下的起落架,设计阶段需要充分考虑温度对缓冲器内气压和油液的影响,确保飞机着陆安全。
In order to study the effect of environmental temperature on landing gear buffering performance,by taking an aircraft landing gear as the research object and considering the influence of temperature on air spring force and oil damping force in the landing gear dynamic model,this paper puts forward a landing gear dynamic analysis model considering the effect of temperature.The model is verified by experiments in a temperature range(-35℃~60℃).Combined with experimental data and simulation model,the guiding values of air variable index and oil damping coefficient are given,and the influence law of temperature on landing gear buffering performance is studied.The results show that the ambient temperature has a significant effect on the landing gear buffering performance,which is manifested as the change of the landing gear vibration load.And it is found that the gas in the buffer chamber is more sensitive to the influence of temperature than the oil.At a low temperature,the change of air pressure and the change of oil physical state will make the buffer performance deteriorate significantly,and the change rate of the buffer pillar stroke reaches 25%.For landing gear that may work in complex environments,the influence of temperature on air pressure and oil in the buffer should be fully considered in the design stage to ensure the safety of aircraft landing.
作者
朱晨辰
王彬文
马晓利
刘小川
王计真
ZHU Chenchen;WANG Binwen;MA Xiaoli;LIU Xiaochuan;WANG Jizhen(Aircraft Strength Research Institute of China,710065 Xi’an,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2023年第1期25-33,共9页
Chinese Journal of Applied Mechanics
基金
航空科学基金项目(No.20200041052002)。
关键词
高低温环境
起落架
落震试验
缓冲性能
参数识别
high and low temperature environment
landing gear
drop test
buffering performance
parameter identification
