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Level set topological optimization method for optimal design of curved shell structure

A topology optimization and optimization design technology, applied in computing, special data processing applications, instruments, etc., can solve the problem of less application of curved shell structures, and achieve the effect of increasing efficiency, optimizing design, and reducing the amount of calculation.

Active Publication Date: 2019-12-10
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0005] The level set method topology optimization method has been widely used in the topology optimization design of two-dimensional planar structures and three-dimensional solid structures, but it is rarely used in curved shell structures

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  • Level set topological optimization method for optimal design of curved shell structure
  • Level set topological optimization method for optimal design of curved shell structure
  • Level set topological optimization method for optimal design of curved shell structure

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Such as Figure 4 A level set topology optimization method for the optimal design of curved shell structures is shown, including the following steps:

[0046] Step 1. Determine and discretize the design domain according to the requirements of the actual curved shell structure. Specifically, in Abaqus, Strand7 or Rhino finite element modeling and analysis software, the design domain is discrete and finite element meshed, and the following is obtained: Figure 2a In the curved shell structure shown, the node information and unit information on the surface are derived; the node information includes the numbers and coordinates of all nodes; the unit information includes: unit numbers and the node numbers that make up each unit.

[0047] Step 2. Determine displacement constraints and load boundary conditions according to the actual working conditions of the curved s...

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Abstract

The invention discloses a level set topological optimization method for optimal design of a curved shell structure. The level set topological optimization method comprises the following steps of step1, determining an appropriate design domain according to actual structural condition requirements and performing discretization; step 2, determining a displacement constraint and a load boundary condition according to the actual working condition of the structure; step 3, adopting a quadrilateral flat plate shell unit, setting nodes on the curved surface of the curved shell structure, setting an initial level set function value, and constructing a four-dimensional level set function field; 4, solving a unit density value; step 5, performing finite element analysis on the structure, calculatinga velocity field at the geometric boundary of the structure according to an analysis result, and updating a level set function; step 6, iterative convergence judgment; and step 7, optimization structure processing. In the optimization design of the curved shell structure, the calculation amount can be obviously reduced, the calculation efficiency is improved, and the method can adapt to more complex structures.

Description

technical field [0001] The invention belongs to the related technical field of structure optimization design, and relates to a level set topology optimization method for the optimization design of curved shell structures. Background technique [0002] Structural topology optimization is to optimize a certain performance index of the structure by changing the topology of the structure, that is, the distribution of materials in the design domain, within the specified design area, given the load and displacement boundary conditions, and under certain design constraints. . Using topology optimization method, designers can get rid of empirical design and develop novel and special structural forms more easily. [0003] Since Osher and Sethian proposed the Level Set Method (Level Set Method) to track the shape change process of flames in 1988, the Level Set Method has been widely used in the fields of computer graphics, fluid mechanics, image processing and structural optimization...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 魏鹏聂利娟刘嘉馨汪雯雯
Owner SOUTH CHINA UNIV OF TECH
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