RESEARCH ON SEAT VERTICAL IMPАСT PULSE ENVELOPE BASED ON OCCUPANT LUMBAR INJURY INDEX

LIN Ce; LI LeiZi; LI QingFeng

doi:10.16579/j.issn.1001.9669.2024.01.011

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RESEARCH ON SEAT VERTICAL IMPАСT PULSE ENVELOPE BASED ON OCCUPANT LUMBAR INJURY INDEX

更新时间：2024-04-18

- RESEARCH ON SEAT VERTICAL IMPАСT PULSE ENVELOPE BASED ON OCCUPANT LUMBAR INJURY INDEX
- Journal of Mechanical Strength Vol. 46, Issue 1, Pages: 77-86(2024)
- 作者机构：
  
  1. 湖北航宇嘉泰飞机设备有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2024.01.011
  CLC： V219
- Published：15 February 2024，
- 稿件说明：
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LIN Ce, LI LeiZi, LI QingFeng. RESEARCH ON SEAT VERTICAL IMPАСT PULSE ENVELOPE BASED ON OCCUPANT LUMBAR INJURY INDEX. [J]. Journal of Mechanical Strength 46(1):77-86(2024)
DOI：

LIN Ce, LI LeiZi, LI QingFeng. RESEARCH ON SEAT VERTICAL IMPАСT PULSE ENVELOPE BASED ON OCCUPANT LUMBAR INJURY INDEX. [J]. Journal of Mechanical Strength 46(1):77-86(2024) DOI： 10.16579/j.issn.1001.9669.2024.01.011.

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14

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。

Abstract

According to a certain type of aireraft fuselage structure's crashworthiness(occupant survivability envelope) design requirements

a standard 14

vertical impact test of the 'floor-seat-occupant' system which meet the requirements of AC25.562-1B 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 desig

n of aireraft 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.

关键词

适坠性冲击试验腰椎载荷座椅冲击波形有限元

Keywords

CrashworthinessImpact testLumbar loadSeatImpact pulseFinite element

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