摘要
结合某型号飞机的机身结构适坠性(乘员生存力包线)设计需求,首先开展了满足AC 25.562-1B规章要求的“地板⁃座椅⁃乘员”系统的标准14g垂直冲击试验,并基于Ls⁃Dyna有限元软件进行仿真,与试验对标;在完成仿真模型标定后,为了模拟垂直坠撞工况下的乘员腰椎损伤情况,开展了80°工装角度的不同峰值和脉宽的三角波形设计、仿真分析和试验验证,获得了符合乘员腰椎损伤指标的座椅垂直冲击波形包线,为飞机机身结构适坠性设计提供参考。另外,基于乘员腰椎载荷损伤指标提出了座椅“传力系数K”的概念,以及坐垫在不同波形工况下对乘员腰椎载荷的滞后性影响。
According to a certain type of aircraft fuselage structure′s crashworthiness(occupant survivability envelope)design requirements,a standard 14g vertical impact test of the"floor⁃seat⁃occupant"system which meet the requirements of AC 25562-1B regulations was carried out first.Then,finite element model calibration of the test was carried out based on Ls⁃Dyna software.After calibration,in order to simulate the vertical drop conditions,several impact pulses with different peaks and widths were designed,calculated and tested on 80°fixture condition,and obtained the seat vertical impact pulse envelope meeting the occupant lumbar injury index,which provide reference for the design of aircraft fuselage structure.In addition,the concept of seat"force transfer coefficient K"and the hysteretic effect of seat cushion on passenger lumbar load under different impact pulses were proposed based on the injury index of passenger lumbar load.
作者
林策
李磊子
李庆锋
LIN Ce;LI LeiZi;LI QingFeng(Jiatai Aircraft Equipment Co.,Ltd.,Xiangyang 441000,China)
出处
《机械强度》
CAS
CSCD
北大核心
2024年第1期77-86,共10页
Journal of Mechanical Strength
关键词
适坠性
冲击试验
腰椎载荷
座椅
冲击波形
有限元
Crashworthiness
Impact test
Lumbar load
Seat
Impact pulse
Finite element
