Custom dot matrix standard unit and dot matrix structure

Abstract

The invention provides a custom dot matrix standard unit and a dot matrix structure, the custom dot matrix standard unit is firstly custom, and the geometric definition of the standard unit is that eight special intersection points of a cube are defined by eight vertexes of the cube and six center points of six surfaces; and connection is formed in a specific mode. And a sandwich structure formed by self-defined dot matrix standard units according to the interval of zero period array is adopted. The sandwich structure has isotropy, is light in weight and has excellent mechanical properties. Meanwhile, by changing the parameters, structural diversification can be achieved, and structures with different weights and mechanical properties are obtained so as to meet different structural design requirements.

Description

technical field [0001] The invention belongs to the field of structure design, and in particular relates to a self-defined lattice standard unit and a lattice structure. Background technique [0002] The lattice structure is an internal hollow grid structure similar to a honeycomb sandwich, characterized by three-dimensional periodic ordered pores, such as figure 1 , has excellent strength, stiffness, and light weight characteristics. This is a new structural form that cannot be realized by traditional techniques. In recent years, with the rapid development of selective melting additive manufacturing technology, lattice structures have been widely used in aviation and aerospace. aspects of the field. [0003] All lattice structures are formed by lattice standard units according to certain arrangement rules, such as figure 2 , the lattice standard unit is the basic element of the lattice structure. To design and manufacture the lattice structure, the structural form and ar...

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Problems solved by technology

However, these lattice units generally have complex shapes, variable cross-sections, and large data volumes, such as Figure 4 , the amount of data of the formed lattice model is much larger than that of the conventional structural digital model, and the time to construct the lattice model is several times longer than that of the general model, and the structural force characteristics brought by different lattice units are also different. The selection of units is constrained by the software unit library

Occasionally, designers use self-designed units for lattice structure design, but due to the influence of the force characteristics of lattice units and the amount of model data, satisfactory results cannot be achieved

[0005] Although the lattice structure has been widely used at home and abroad, there is no software for lattice structure design in China, and there is no own lattice unit library. The real expression of lattice structure requires the application of some foreign software. , mainly including 3-matic software from Materialise, Addive workbench from GE, Netfab released by Autodesk, 3Dsimd from Ansys, etc. The latest version of CATIA launched on the V6 platform also has the capability of dot matrix design. These foreign software prices are relatively expensive. Computer configuration requirements are relatively high, some are not yet mature, and most design units have not yet introduced

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