起落架落震试验环境温度模拟技术研究
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摘要
目的验证某型飞机从万米高空俯冲降落直至着陆滑跑过程中,在经历了环境温度从-55℃到常温快速剧烈变化后起落架性能的改变。方法依据起落架落震试验要求,进行起落架高低温环境模拟技术研究。结果综合考虑试验技术指标、试验件结构尺寸和试验场地限制,成功研制了专用的起落架高低温环境模拟设备。结论为研究起落架缓冲器内敏感参数与温度的变化规律和起落架结构性能提供了验证手段。
Objective To verify the performance change of a landing gear after a rapid and severe change of ambient temperature from-55 ℃ to normal temperature in the progress of aircraft diving form high altitude to landing and taxiing. MethodsHigh and low temperature environment simulation techniques for aircraft landing gear were researched according to requirements on drop test of landing gear. Results Special high and low temperature simulation equipment for landing gear was successfully developed in view of indicators on test techniques and restrictions on structural size of test piece and test site. Conclusion It provides a method for verifying change rules of sensitive parameters and temperature in the buffer of the landing gear and the structural performance of the landing gear.
Objective To verify the performance change of a landing gear after a rapid and severe change of ambient temperature from-55 ℃ to normal temperature in the progress of aircraft diving form high altitude to landing and taxiing. MethodsHigh and low temperature environment simulation techniques for aircraft landing gear were researched according to requirements on drop test of landing gear. Results Special high and low temperature simulation equipment for landing gear was successfully developed in view of indicators on test techniques and restrictions on structural size of test piece and test site. Conclusion It provides a method for verifying change rules of sensitive parameters and temperature in the buffer of the landing gear and the structural performance of the landing gear.
引文
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[2]豆清波,史惟琦,牟让科,等.基于落震试验的油-气式起落架气体压缩多变指数变化规律研究[J].实验力学,2015(2):215-220.
[3]GB/2423.1—89,电工电子产品基本试验规程(试验A:低温试验方法)[S].
[4]GB/2423.2—89,电工电子产品基本试验规程(试验B:高温试验方法)[S].
[5]GJB/150.3A—2009,军用装备实验室低温试验方法[S].
[6]GJB/150.4A—2009,军用装备实验室高温试验方法[S].
[7]GB 10589—89,低温试验箱技术条件[S].
[8]GB 10592—89,高低温试验箱技术条件[S].
[9]GB 11158—89,高温试验箱技术条件[S].
[10]陶文铨.传热学[M].西安:西北工业大学出版社,2006.
[11]于华芳,李长富.冷库维护结构绝热层厚度的计算[J].吉林化工学院学报,2010(4):30-32.
[12]李兆坚.环境室制冷方式的选择[J].环境技术,1994(3):18-19.
[13]刘文斌,曹广忠,李永光,等.温湿度环境试验设备的现状及发展[J].现代制造工程,2013(11):133-140.
[14]朱魁章,乐子玲,韩锐.用液氮制冷的高低温箱的设计[J].制冷,1997(2):43-46.
[15]韩琦.HLT500高低温试验箱PLC控制系统[J].低温与超导,2008(6):70-73.
[16]王栋,陶乐仁,刘训海.隔断装置对冷风机电热融霜影响的实验研究[J].制冷学报,2014(6):81-84.