Citation: | DENG Haoyu, WANG Chunjie. Equivalent thermal analysis and optimization method for three-dimensional lattice structure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(6): 1122-1128. doi: 10.13700/j.bh.1001-5965.2018.0561(in Chinese) |
In order to achieve efficient and accurate thermal conduction analysis of three-dimensional lattice, based on the principle of thermodynamics, the equivalent heat conduction formula of lattice structure is deduced, and the modeling method of the equivalent heat conduction analysis model is proposed.The equivalent finite element model of lattice structure is established by using equivalent modeling method.Then the efficiency and accuracy of the heat conduction analysis of the equivalent model are proved by comparing with the results of the non-equivalent finite element model. Aimed at the optimization design of lattice structure under the requirement of function and performance, the lattice structure optimization method is given and the optimization mathematical model is established based on the proposed equivalent analysis method. The mixed integer sequential quadratic programming (MISQP) algorithm is used for iterative computation and the optimal design scheme is obtained, which makes the lattice structure meet the thermal performance constraints and mass has been reduced.
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