Title: Incremental harmonic balance method for analysis of standard/smart vehicles-to-rigid barrier frontal collision

Authors: Ahmed Elmarakbi, Jean Zu

Addresses: Automotive Engineering and Design, School of Computing and Technology, University of Sunderland, Chester Road, Sunderland SR1 3SD, UK. ' Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario M5S 3G8, Canada

Abstract: The aim of this paper is to investigate and to enhance crashworthiness of frontal barrier impact using a new idea of crash improvement. Two different types of smart front-end structure are proposed to support the function of the existing vehicle. The work described includes developing and analysing mathematical models of vehicle-to-rigid barrier full and offset frontal collision events for the two types of smart front-end structure. In these models, vehicle components are modelled by lumped masses and nonlinear springs. Moreover, the hydraulic cylinders are represented by non-linear damper elements. In this paper, the dynamic responses of the crash events are obtained with the aid of analytical approach using the Incremental Harmonic Balance Method (IHBM). In addition, the intrusion injury and occupant deceleration are used for interpreting the results. It is demonstrated from simulation results that significant improvements to both intrusion and deceleration injuries are obtained using the smart front-end structures.

Keywords: crashworthiness; vehicle-to-rigid barrier collision; full frontal impact; offset frontal impact; smart front-end structures; analytical analysis; incremental harmonic balance method; IHBM; vehicle safety; frontal barrier impact; crash improvement; component modelling; lumped masses; nonlinear springs; dynamic responses; intrusion injury; occupant deceleration; simulation.

DOI: 10.1504/IJVS.2007.015545

International Journal of Vehicle Safety, 2007 Vol.2 No.3, pp.288 - 315

Published online: 26 Oct 2007 *

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