升降平台跌落对起落架过载的影响  

Effect of Elevator Platform Drop on Overload of Landing Gear

作　　者：郝志福 王秀霞[1] 沈伟 胡国才 HAO Zhifu;WANG Xiuxia;SHEN Wei;HU Guocai(College of Aeronautics,Yantai Nanshan University,Longkou 265713,China)

机构地区：[1]烟台南山学院航空学院,龙口265713

出　　处：《南京航空航天大学学报》2021年第2期306-312,共7页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：建立了升降平台跌落时起落架动力学模型,给出了描述缓冲支柱和轮胎力性能的数学公式,使之适用于起落架严重受载的情况;通过数值仿真研究了升降平台跌落时的直升机起落架过载。分析了升降平台跌落时起落架产生大过载的力学机理。升降平台从不同高度自由跌落时,机轮系留引起的起落架正过载相对增加量不超过10%,而系留情况下起落架回弹行程中的负过载比压缩行程中的正过载高得多。A dynamic model for overload of landing gear due to elevator platform dropping is proposed.Mathematical formulations for mechanical properties of shock strut and tire are given for large loading conditions.Numerical simulations are applied to study overload of landing gear in elevator platform dropping.Mechanical mechanism of large overload of landing gear due to elevator platform dropping is analyzed.If the elevator platform drops freely from different height,the comparative increment of overload of landing gear caused by wheel mooring is no more than 10%.However,in a case of wheel mooring,the negative amplitude of overload within tension period will be much larger than the positive overload within compression period.

关 键 词：直升机 升降平台 起落架 过载 机轮系留 

分 类 号：V212.4[航空宇航科学与技术—航空宇航推进理论与工程] V215.3