Structure Design of Target Vehicle Based on EDTW Envelope Curve of Star Vehicles

Abstract

In order to initiatively design structure of better impact potential for target vehicle, firstly EDTW (Equivalent Dual Trapezoids Wave) of target vehicle is derivable from the EDTW envelope curve of the existent C-NCAP tested star cars, so the relationship between energy absorption and crush distance is integrated from the EDTW step by step. Based on energy method, the average forces passing through the energy absorbing boxes, the frontal, the rear portions of the longitudinal rails can be calculated. The structural parameters are calculated based on three design principles (maximum bearing load, mean crush force and deformation sequence control) of thin walled beam. The design results show the energy absorbing boxes and the rails with ordinary high-strength steel material HC420LA, of which width is 60mm and height is 110mm, but cross-section thicknesses are 2mm and 2.2mm respectively.