Optimal design method for reinforcement layout of thin-walled reinforced structures

A design method and optimization design technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as inability to deal with parametric definition of reinforcement layout

Inactive Publication Date: 2011-12-14
NANTONG YONGDA PIPE IND +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiency that the prior art reinforcement layout optimization design cannot deal with the parametric definition of the reinforcement layout of the free grid model, the present invention provides a method for the optimization design of the reinforcement layout of the thin-walled reinforcement structure, which implements reinforcement through the geometric background grid. Parametric definition of reinforcement layout, which can realize the parametric definition of reinforcement layout of free grid model

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  • Optimal design method for reinforcement layout of thin-walled reinforced structures
  • Optimal design method for reinforcement layout of thin-walled reinforced structures
  • Optimal design method for reinforcement layout of thin-walled reinforced structures

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Embodiment 1

[0035] Example 1: The length and width of the substrate are both 0.1m, the thickness is 0.001m, and the height of the reinforcement is 0.004m. The four corners of the structure are supported at fixed points, and the center is subjected to the action of lateral concentrated load F=200N. Material elastic modulus E=2×105Mpa, Poisson's ratio is 0.3. The design area of ​​reinforcement is set as the space formed by the upper surface of the substrate along the normal direction of the substrate with a translation distance of 0.004m. The material consumption in the design area is 10%, and the initial value of the corresponding design variable is 0.1. The layout of reinforcement is designed to maximize the structural rigidity.

[0036] (1) Determine the optimal design area as the length, width and height above the surface of the substrate are 0.1×0.1×0.004m 3 The space area, the non-design area is the substrate 0.1×0.1×0.001m 3 The CAD model is established in the spatial area; the CAD...

Embodiment 2

[0055] Embodiment 2: The length and width of the substrate are both 0.1m, the thickness is 0.001m, and the height of the reinforcement is 0.004m. The four corners of the structure are supported at fixed points, and the center is subjected to the action of lateral concentrated load F=200N. Material elastic modulus E=2×105Mpa, Poisson's ratio is 0.3. The design area of ​​reinforcement is set as the space formed by the upper surface of the substrate along the normal direction of the substrate with a translation distance of 0.004m. The material consumption in the design area is 10%, and the initial value of the corresponding design variable is 0.1. The layout of reinforcement is designed to maximize the structural rigidity.

[0056] (1) Determine the optimal design area as the length, width and height above the surface of the substrate are 0.1×0.1×0.004m 3 The space area, the non-design area is the substrate 0.1×0.1×0.001m 3 The CAD model is established in the spatial area; the ...

Embodiment 3

[0075] Embodiment 3: The outer diameter of the spherical shell is R=0.07m, the thickness t=0.001m, the height of the internal reinforcement is h=0.004m, and the outer surface of the ball bears a certain non-uniform pressure. Elastic modulus E=2×105Mpa, Poisson's ratio is 0.3, the reinforced design area is the spherical shell space between R1=0.065 and R1=0.069, and the material consumption is 20%. Find the spatial layout of the reinforcement to maximize the stiffness of the structure.

[0076] (1) Determine that the optimal design area is the spherical shell space between spherical radius R1=0.065m to R1=0.069m, and the non-design optimized area is the space area between spherical radius R=0.07m to R=0.069m, and establish CAD The model, that is, the spherical shell space with a radius of R=0.65~0.69m; the CAD model is divided into grids, and one-eighth of the model is modeled according to the symmetry; the non-design area is divided into regular hexahedral grids, and the desig...

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Abstract

The invention discloses a thin-walled reinforced structure reinforcement layout optimization design method, which is characterized in that it includes the following steps: firstly, establish the CAD models of the optimized design area and the non-optimized design area of ​​the thin-walled reinforced structure, and divide the CAD model Finite element grid; determine all the finite element grids corresponding to the same geometric background grid as a group, and use the variable connection method to assign the same pseudo-density value to the finite element grids in a group of geometric background grids, Establish a topology optimization model based on boundary conditions and load conditions, and obtain reinforcement layout results. Since the parametric definition of the reinforcement layout is implemented through the geometric background grid, the deficiency of the prior art in dealing with the optimization design of the reinforcement layout of the free grid model is solved, and the layout optimization design of the reinforcement layout of the arbitrary grid finite element model is realized.

Description

technical field [0001] The invention relates to a reinforcement layout optimization design method, in particular to a reinforcement layout optimization design method for a thin-walled reinforcement structure. Background technique [0002] The thin-walled reinforced structure is composed of two parts, the base plate and the reinforced structure, and the topology optimization method is often used to optimize the layout of the reinforced structure. Thin-walled reinforced structures of aerospace vehicles generally have the characteristics of relatively complex and irregular geometric shapes, and solid finite elements are often used to discretize the structures. Topology optimization technology is used to study the reinforcement layout of these thin-walled structures. Firstly, the layout of reinforcement is defined parametrically by imposing tensile direction constraints on the solid element finite element model, that is, in the design area of ​​reinforcement along the direction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张卫红章胜冬
Owner NANTONG YONGDA PIPE IND
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