Evaluation and analysis method of aviation seat crashworthiness

Abstract

In order to research the structural response characteristics of an aviation seat under crash scenarios,an evaluation and analytical method of aviation seat crashworthiness was proposed for a seat / occupant system. A finite element model of the seat was established based on actual seat geometry and reasonable simplifying assumptions,then the seat model was coupled with a 50 th Hybrid Ⅲ multi-rigid-body dummy model.A crashworthiness simulation of this seat / occupant system was carried out according to airworthiness regulations which define dynamic impact test methods and qualification requirements for crew seats in general aviation aircraft in consideration of the cabin floor deformation. Seat deformations and energy-absorption,as well as occupant injury indicators under typical loading conditions were obtained. The results show that the seat /occupant system suffers more serious damage under forward and lateral loading,and the plastic deformation of the front seat beams increases when the backrest adjustment mechanism is too rigid. Cabin floor deformation aggravates seat structure damage. Compared with pitch deformation,roll deformation of the cabin floor causes greater damage. Modifications for the seat structure are proposed to improve its crashworthiness.