关键词: 铝合金；防护装置；有限元模型；一体化设计；拉丁超立方抽样

Abstract: This paper focuses on aluminum alloy automotive protection devices. A finite element model of the rear under-run protection device is constructed and verified by comparing with the experimental results. Firstly, the structure of the rear under-run protection device and the research status at home and abroad are introduced. Then, the tests of the rear under-run protection device and the benchmarking of the simulation model are carried out to verify the accuracy of the model. On this basis, the rear under-run protection device is optimized. The thicknesses of the crossbeam and the connecting bracket are selected as variables, and the Latin hypercube sampling method is used. As a result, a weight reduction of about 10% is achieved while meeting the national standard requirements, and the cost is reduced. Finally, the integrated design of the front and rear under-run protection devices is explored. The test differences between the front and rear under-run protection devices are compared, providing a research direction for the dimension design of the front under-run protection device. The research results provide a reference for the design optimization and integrated development of aluminum alloy protection devices.

Key words: aluminum alloy; protection device; finite element model; integrated design; Latin hypercube sampling