Multi-field coupling effect structure design method combining topological optimization and shape optimization

Abstract

The invention relates to a structure optimization design technology, in particular to a multi-field coupling effect structure design method combining topological optimization and shape optimization, and the method comprises the following steps: creating a multi-field coupling effect topological optimization model by using a topological optimization method based on a variable density method, wherein a multi-physical field numerical model, a design domain, a boundary condition, a target function, a constraint condition and a design variable are included, calculating and obtaining sensitivity information of the target function to the design variable through a multi-field coupling finite element simulation method so as to update the design variable value of each unit in the design domain, and finally obtaining an optimal topological structure under the multi-field coupling effect. A topological structure is extracted, a shape optimization design model under the multi-field coupling effect is constructed according to the topological structure, then on the basis of multi-field coupling simulation, the structure contour is further optimized, the overall performance of the structure is improved, and finally the optimal structure meeting the multi-physics coupling effect is obtained. The requirements of the structure for various physical properties are met, the topological optimization structure is improved, and the structural performance is improved.

Description

technical field [0001] The invention belongs to the technical field of structural optimization design, and in particular relates to a structural design method of multi-field coupling combined topology optimization and shape optimization. Background technique [0002] The structural optimization problem of multi-field coupling is a multi-disciplinary and multi-field collaborative structural design problem. Structures in multi-fields are often affected by two or more physical fields including force, heat, sound, light, electricity, magnetism, and chemistry. Co-influence of physical fields. Under the joint action of these physical fields, various physical properties of the structure need to be considered comprehensively. Due to the complex coupling relationship between multiple fields, it is necessary to balance the weight relationship between different performance indicators of the structure. Therefore, the structural optimization problem of multi-field coupling is also Multi...

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Problems solved by technology

The gray-scale unit has certain physical properties in the actual optimization process, but when the final structure is extracted, the influence of the gray-scale unit on the structural performance is ignored, which also makes the final extracted structural performance deviate from the optimization result

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