RESEARCH ON SEAT VERTICAL IMPACT PULSE ENVELOPE BASED ON OCCUPANT LUMBAR INJURY INDEX
LIN Ce
LI LeiZi
LI QingFeng
Abstract：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 25.562-1B 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 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.
Keywords：CrashworthinessImpact testLumbar loadSeatImpact pulseFinite element
Publication Date：2024-02-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 77-86 )