Topological optimization method based on isogeometric particle description

Abstract

A topological optimization method based on isogeometric particle description adopts an isogeometric particle fluid dynamics method to carry out physical field simulation calculation, combines a topological representation method based on a variable density method SIMP to complete structure optimization design, and obtains an optimal structure according to a Lagrange viewpoint thought and a flow field simulation result of an unsteady flow field. Sensitivity analysis of the target function about design variables is completed, the design variables are iteratively optimized, so that the target function is pushed to change according to the design intention, the structure is promoted to approach to the preset performance, and finally the optimal combination of material layout and structure design under the given constraint is completed; the correctness of the structural design can be ensured at the beginning of design, and the structural design period can be remarkably shortened.

Description

technical field [0001] The invention relates to the technical field of topology optimization in complex physical fields, in particular to a topology optimization method based on equigeometric particle description. Background technique [0002] The integrated design of power electronic equipment, aerospace equipment design, nuclear energy equipment design, micro-nano fluidic control structure, thermal control structure design and other complex high-end equipment technology fields often involve the solution of complex coupled physical fields and structural optimization design problems. For the solution of complex physical fields, the existing numerical analysis methods are mainly based on the Euler grid method such as finite element or finite body and the meshless method of smooth particle hydrodynamics. Although such numerical analysis methods have been widely used, There are a large number of commercial software, but for the calculation of complex coupled physical fields, th...

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Problems solved by technology

However, under the development requirements of the integration of structural design, function and structure, the above-mentioned design modes cannot guarantee the correctness of the structural design at the beginning of the design, it is difficult to quickly and efficiently tap the potential of the structural design, and the maximum ability of the material layout cannot be brought into play. design theory basis

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