Multi-objective Optimization of Mechanical Performance of Pyramid Lattice Element
In this study,the genetic algorithm(GA)and response surface method(RSM)are used to optimize structural parameters multi-objectively to maximize the ultimate specific uniaxial compression and specific pure shearing bearing capacity of pyramid lattice elements.The optimization result is verified by finite element simulation and experiment.The results show that the prediction results of the optimal structure based on the genetic algorithm are 30.1%and 91.6%higher than those of the conventional structure for the ultimate uniaxial compression and pure shearing bearing capacity,respectively.The finite element analysis results of the optimized structure are 39.7%and 90.5%higher than those of the conventional structure for the uniaxial compression and pure shearing bearing capacity,respectively.The experimental result of the optimal structure is 44%higher than that of the conventional structure for the ultimate uniaxial compression bearing capacity.The ability of the proposed optimization method was verified by both the finite element analysis and experiment and it can be applied in the design of lattice structures.
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