Title: Define occupant restraint system characteristics by using two-step trapezoid method based on ride-down rate control in frontal impact

Authors: Jian Zhou; Shaobo Qiu; Junyuan Zhang; Yue Ma

Addresses: Faw Automotive Technology Research Center, No. 1063 Chuangye Street, Changchun, China ' Faw Automotive Technology Research Center, No. 1063 Chuangye Street, Changchun, China ' State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China ' State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China

Abstract: This paper presents a trapezoid method for occupant restraint system design analysis based on occupant ride-down energy control theory. The sub-system characteristic determination of an occupant restraint system could be simplified and analysed by a two-step trapezoid energy curve which is generated from ride-down energy control method. The parameter definitions resulted from the target two-step residual energy trapezoid analysis for some case studies were put into a numerical model for validation. Occupant responses showed very good agreements between the outcomes both from trapezoid analysis and the numerical simulation. In the concept design phase, this method could be used to give rapid assessments for restraint system parameters based on occupant injury target, available vehicle crush space and interior survival space design, and provide reliable inputs for sub-restraint system design and a good reference point for the initial restraint system layout.

Keywords: ride-down energy control; occupant restraint systems; concept design; occupant energy management; two-step trapezoid analysis; frontal impact; frontal collisions; numerical modelling; numerical simulation; occupant injury targets; vehicle crush space; interior survival space design; seat belts; airbags.

DOI: 10.1504/IJVS.2015.074377

International Journal of Vehicle Safety, 2015 Vol.8 No.4, pp.314 - 338

Received: 13 Jan 2015
Accepted: 31 Jul 2015

Published online: 25 Jan 2016 *

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