关键词: 轻量化, 概念设计, 拓扑优化, 螺栓优化

Abstract: Topology optimization was the main method for the model conceptual design of a lightweight design. But the calculation results of the direct topology was usually chaotic for large models. So the topology space should be divided into several small areas in accordance with the operating requirements to make the results more clear. Based on topology calculation, the optimal placement method of the high strength bolts used bar elements to simulate bolts to calculate their relative densities. Then according to results, the position of high strength bolts in parts could be accurately determined. It is conducive for the rational use of high strength bolts. In the lightweight design process of a certain truck frame, the premise was to ensure the stiffness and strength performance to meet the demands of the typical working conditions from beginning to end. At the same time according to different design goals the design variables and constraints should be constantly adjusted and refined for the comprehensive applictions of topology optimization and size optimization. The final results show that after the optimization design the total mass reduces 60.4 kg. The effectiveness of weight loss is more than 10%.

Key words: lightweight, conceptual design, topological optimization, bolt optimization