Front Rail Crashworthiness Design for Front Oblique Impact Using a Magic Cube Approach

摘要: The front rail, as one main energy absorption component of vehicle structures, should present steady progressive collapse along its axis and avoid bending during the oblique impact, but when angle loading direction is larger than some critical angle, it will appear causing reduced capability crash absorption. This paper concerned with crashworthiness design rail on a chassis frame structure considering uncertain directions. objective to improve adaptability without deteriorating vehicle's performance. Magic Cube (MQ) approach, systematic conducted analyze problem. By applying Space Decomposition MQ, an equivalent model generated, which simplifies Based this model, two-layered proposed using multi-step multi-domain topology optimization method response surface method. Numerical simulations are carried out Altair/Hypermesh LS-DYNA compare performances original design. result shows that weight by 17%, can absorb 46% more in 30 degree impact design, meanwhile, eliminates rear end reaches angle. uncertainty significantly improved. Language: en