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Crashworthiness Optimization of an Automotive Frame Based on Gray Relation Theory
Journal Article
02-14-04-0032
ISSN: 1946-391X, e-ISSN: 1946-3928
Sector:
Topic:
Citation:
Zhao, Z., Jiang, Z., Hu, C., Wang, Y. et al., "Crashworthiness Optimization of an Automotive Frame Based on Gray Relation Theory," SAE Int. J. Commer. Veh. 15(1):27-35, 2022, https://doi.org/10.4271/02-14-04-0032.
Language:
English
Abstract:
A current automotive frame did not absorb energy efficiently during a vehicle
frontal crash test. To solve this problem, the finite element model was
established. The accuracy of the established model was verified through a real
vehicle crash test. Then the orthogonal design of the experiment was conducted.
The thicknesses of the outer and inner plates of front anti-collision beams,
connecting brackets, and outer and inner plates of front rails were selected as
variables. Then the optimum combination of variables was determined by applying
gray relational theory. The results showed that the optimized frame can absorb
more impact energy than the original design. Maximum deceleration of the lower
part of the B-pillar decreased significantly during a frontal crash. Thus the
problem of excessive deformation of the rails was solved, and the proposed
method can be applied to the optimization of vehicle crashworthiness.