Topological optimization design method of self-supporting network structure suitable for additive manufacturing

A topology optimization, mesh structure technology, applied in design optimization/simulation, calculation, special data processing applications, etc., can solve problems such as high experience requirements, unstable quality, large limitations, etc., to reduce costs, improve surface The effect of quality and manpower reduction

CN107025340AActive Publication Date: 2017-08-08HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-08-08

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Abstract

The invention belongs to the field of related technologies of structure optimizing design and discloses a topological optimization design method of a self-supporting network structure suitable for additive manufacturing. The method comprises following steps: (1), density distribution of different levels of solid materials in a range of [0,1] is acquired by an SIMP (solid isotropic material with penalization) design-rigidity interpolation model, and a macroscopic material layout form and a macroscopic displacement field are obtained simultaneously; (2), an optimization model based on a level set parameterization method is constructed, and on the basis of macroscopic material layout optimization, topological optimization of microstructural configuration is performed on different intermediate density units and an optimal mesoscopic microstructural configuration is output. According to the method, a supporting structure is combined with the designed structure, the macroscopic material layout optimization and microscomic microstructure topological optimization are integrated, so that addition of the supporting structure to additive manufacturing molding is avoided, consumable items are saved, the cost is reduced, the flexibility is higher, and the structure surface quality is protected.
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Description

technical field

[0001] The invention belongs to the related technical field of structure optimization design, and more specifically relates to a self-supporting network structure topology optimization design method suitable for additive manufacturing. Background technique

[0002] In the additive manufacturing system, the support generation technology is the key technology, it can constrain the deformation of the parts, and make the parts can be manufactured smoothly, the research significance is very important. However, the structural design of process support has always been the bottleneck in the development of additive manufacturing technology. Some research has been done in this area at home and abroad, but the solution is not ideal, such as the cumbersome design process and high requirements for equipment operators. For example, when the 3D printers on the market are printing, the material is heated and melted in the nozzle, and the nozzle moves along the contour of the...

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0051] The self-supporting network structure topology optimization design method suitable for additive manufacturing provided by the preferred embodiment of the present invention mainly includes two steps: macroscopic material layout optimization and microscopic microstructure topology optimization. The structure obtained by the self-supporting network structure topology optimization design meth...