基于有限元分析软件LDYNA对设计的一种薄壁、中空且带加强筋的铝合金保险杠横梁的摆锤和台车试验进行了有限元模拟；并进行相关试验，与钢制横梁的碰撞性能进行对比。结果表明：在20km·h-1低速碰撞条件下台车有限元模拟与实际试验结果吻合较好；铝合金横梁较原钢制横梁有更好的刚度和吸能性能；在相同的碰撞试验条件下，钢制横梁的吸能性有限，而铝合金横梁能够在较大的速度范围内保持较高的吸能性能。
The pendulum bob and platform crash tests for designed aluminum alloy car bumper beam with thin-wall, hollow cross section and strengthening rib simulated by the finite element analysis software-LSDYNA, some revevant tests were performed and the crash properties of the aluminum alloy beam was compared with that of the steel beam. The results show that the finite element results and factual test results for platform tests fit well at low-speed of 20 km·h-1. Comparing with the steel beam, the aluminum one bad better stiffness and energy absorption property. Under the same crash test conditions, the energy absorption property of the steel beam was limited, while the aluminum alloy beam could maintain higher energy absorption property in a larger speed-range.
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