Large structure dynamic optimization design method based on structural decomposition

Abstract

The invention relates to a large structure dynamic optimization design method based on structural decomposition. In three-dimensional modeling software, a geometric model of a large member is established, a size variable of an external frame forming a structural member is recognized, and a basic style and the size variable of an internal composition unit are recognized; the external frame of the structural member is subjected to topological optimization, the size of the internal composition unit is optimized, and size data are acquired; the optimized size data are imported into Isight-FD software, optimization iterative analysis is performed on different combinations and different size configurations of the external frame and the internal composition unit according to the constraint condition and the target function, and an optimization result is output. The method is widely applied to lightweight and weight reduction design of a large and heavy-load complicated structure part and has the advantages of capability of realizing design from the simple into the deep as well as fastness and reliability. Due to the robustness of an algorithm, the geometric structure meeting the requirements of mechanical properties can be found only through a few sampling points, and reliable technical support is provided for structure design work of large heavy-load equipment at the present stage.

Description

technical field [0001] The invention relates to the field of dynamic optimization design of large complex components, in particular to a method for dynamic optimization design of large components based on structural decomposition. Background technique [0002] With the vigorous development of my country's current industrialization, some more large and complex heavy-duty equipment gradually appear in our sight, such as: large-scale heavy-duty CNC machine tools, large-scale roadheaders and coal shearers, large-tonnage forging machines and Cranes and cranes with large and high telescopic strokes, etc. These devices are composed of some large and complex components, and the dynamic characteristics of these large structural parts will directly affect the dynamic performance of the entire device. Therefore, the optimal design of the dynamic characteristics of large and complex structural parts in engineering applications in my country has always been a research hotspot. [0003] ...

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Problems solved by technology

[0005] At present, due to insufficient or mismatched dynamic performance (including stiffness, strength, damping and vibration characteristics, etc.) of large-scale heavy-duty equipment in my country during the operation process, the entire equipment itself has structural damage, structural deformation, severe vibration or poor control effect. Ideal, which eventually leads to the failure of the entire job task to achieve the set goal and failure

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