温度对支柱式油气混合起落架缓冲性能影响的试验研究

Experimental research on the effect of temperature on strut hybrid landing gear buffering performance

为研究高低温环境对起落架缓冲性能的影响规律,本文以某型飞机支柱式油气混合起落架为研究对象,利用低温环境箱与缓冲器加热装置实现对试验环境的模拟,提出了一种考虑温度影响的起落架缓冲性能试验方法,通过低温段(-30℃~0℃)、高温段(30℃~60℃)的落震试验,分析了起落架缓冲性能受温度影响的变化规律。结果表明:环境温度对该型起落架缓冲性能影响较大,对缓冲器腔内压力及首个峰值影响明显;低温环境引起缓冲支柱内外筒摩擦力的变化对缓冲支柱行程的影响不容被忽略。

In order to study the influence law of high and low temperature environments on landing gear buffering performance,this paper takes a type of aircraft pillar type mixed landing gear as the research object,simulates the test environment with low temperature environment chamber and buffer heating device,and proposes a test research method of landing gear buffering performance considering the influence of temperature.The effect of temperature on the cushioning performance of landing gear was analyzed through the fall shock tests in low temperature(-30℃~0℃)and high temperature(30℃~60℃).The results show that temperature has a great influence on the buffering performance of the landing gear,and has an obvious influence on the pressure in the buffer cavity and the first peak value.The influence of the change of friction force on the stroke of the cushion pillar caused by low temperature environment cannot be ignored.