摘要
为进一步研究军用飞机着陆过程所需的跑道长度,提出基于安全性的跑道长度安全系数计算方法。主要分析飞机在着陆过程中,受到着陆质量以及风速、气压气温、道面摩擦、纵坡等环境因素的复合影响,用蒙特卡罗法数值模拟满足着陆安全性的跑道长度值L′l,安全系数C为L′l与基准着陆滑跑距离Sl0的比值。结果表明:在同一安全性下,跑道长度的安全系数随着飞机的着陆质量增加而减小;飞机对着陆安全性要求越高则安全系数的值就越大,但是安全系数存在边际值。以某军用机型为例,设定机场的环境因素,数值模拟着陆所需的跑道长度值符合实际要求。若该机型以最大质量进行着陆,当满足安全性为99.99%时,在道面干燥的条件下安全系数为1.40,在道面潮湿的条件下安全系数为1.98。安全系数的最大边际值分别为1.43和2.02。
In order to study the runway length of military aircraft landing,this paper proposes a calculation method of runway length's safety coefficient based on safety.The paper mainly analyzes some environmental factors affected by landing quality,wind speed,pressure,temperature,surface friction or longitudinal slope.The paper utilizes Monte Carlo method for simulating the safety landing runway length value and security coefficient which is taking as the ratio of landing runway length and landing running distance.The results show that the safety coefficient of runway length decreases with the increase of landing quality and the higher the safety requirement of the aircraft,the greater the safety factor,but the safety factor will have a marginal value.Under conditions of taking a certain type of military aircraft as an example and setting the environmental factors of the airport,the paper simulates the length of the runway to meet the needs of actual requirements.If the aircraft lands in the maximum quality,when the safety is 99.99%,the safety factor will be 1.40 and the safety factor will be 1.98 in the wet condition of the road surface.The maximum marginal value of the safety factor is 1.43 and 2.02 respectively.
作者
范博
蔡良才
王观虎
卢航
FAN Bo;CAI Liangcai;WANG Guanhu;LU Hang(Aeronautics Engineering College, Air Force Engineering University, Xi' an 710038, China)
出处
《空军工程大学学报(自然科学版)》
CSCD
北大核心
2018年第2期21-25,共5页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金(51578540)
关键词
机场工程
安全系数
蒙特卡罗法
接地点分布
滑跑距离
airport engineering
safety coefficient
Monte Carlo method
ground distribution
landing dis-tance