BFPC填充阶梯型龙门架结构优化设计

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中图分类号：TH140 文献标志码：A文章编号：1006-0316（2025）12-0009-08

doi ： 10.3969/j.issn.1006-0316.2025.12.002

Abstract ∵ Taking a stepped gantry frame as the research object， this study proposes an optimization approach to first modify the internal rib structure and subsequently fillpartial regions with basalt fiber reinforced polymer concrete （BFPC）， so as to enhance machining accuracy and structural stability. A finite element model of the gantry frame was established to conduct static and dynamic analyses on the original gray cast iron structure. The revealing of itsvulnerable zones provides theoretical basis for subsequent BFPC reinforcement. The optimization process involved reshaping internal ribs，reducing wall thickness，and strategically fillng BFPC in criticalareas near identified weak regions. Through sensitivity analysis， a response surface model was developed with three optimization objectives： to minimize maximum total deformation， to reduce mass，and to increase first-order natural frequency.A multi-objective genetic algorithm yielded thre optimal solution sets.Simulation results demonstrate significant improvements compared to the original design： 5.52% reduction in maximum total deformation， 4.80% mass reduction， and 11.74% enhancement in first-order natural frequency. This methodology effectively improves both static and dynamic performance while achieving lightweight objectives， offeringvaluableinsightsforgantryframeoptimizationdesign. Key words ∵ gantry crane;BFPC;structural filling;multi-objective optimization

机床作为工业母机，是工业化建设的根本保障，也是国防与高技术领域发展的战略支柱。（剩余6009字）