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Space hole optimization design method of thin-wall curved-surface structure with holes

A technology of surface structure and optimization design, which is applied to the optimization design of holes on any thin-walled surface structure in space, and the field of optimization design of space holes for thin-walled surface structures with holes, which can solve the problems of difficult analytical expression of curves and so on.

Active Publication Date: 2010-09-22
JIANGSU SHUANGNENG SOLAR ENERGY +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, in the optimal design of holes on a curved surface, there are problems that the fitting curve of the control vertices of the boundary curve of the hole cannot be guaranteed to always be located on a given surface and the spatial hole circumference curve is difficult to express analytically.
In order to solve this technical problem, the present invention proposes a space hole optimization design method for thin-walled curved surface structures with holes. The design variables are defined on the internal parameter plane of the curved surface, and the space hole optimization design problem is equivalent to Simplified to a planar hole optimization design problem, it can solve the hole optimization design problem on any thin-walled curved surface structure

Method used

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  • Space hole optimization design method of thin-wall curved-surface structure with holes
  • Space hole optimization design method of thin-wall curved-surface structure with holes
  • Space hole optimization design method of thin-wall curved-surface structure with holes

Examples

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Embodiment 1

[0055] Example 1: Optimal design of hole shape on a thin-walled conical surface.

[0056] There are 12 circularly symmetrical holes on the thin-walled conical surface structure, and its basic parameters are shown in Table 1.

[0057] Table 1

[0058]

[0059] (a) Establish the parametric equation of the one-twelfth unit cell structure of the thin-walled conic surface in space:

[0060] x = 200 ( 1 - t ′ ) cos ( 1.4999 s ′ ) y = 200 ...

Embodiment 2

[0084] Example 2: Optimal design of hole shape on thin-walled hemispherical surface.

[0085] There are four circularly symmetrical holes on the thin-walled hemispherical surface structure, and its basic parameters are shown in Table 3.

[0086] table 3

[0087]

[0088] (a) Establish the parametric equation of the quarter unit cell structure of the space thin-walled hemispherical surface:

[0089] x = 300 cos 0.5 πt ′ cos 0.5 πs ′ y = 300 cos 0.5 πt ′ sin 0.5 ...

Embodiment 3

[0113] Example 3: Optimal design of hole shape on thin-walled cylindrical surface sheet.

[0114] There is a hole in the structure of the thin-walled cylindrical surface sheet, and its basic parameters are shown in Table 5.

[0115] table 5

[0116]

[0117]

[0118] (a) Establish the parametric equation of the space thin-walled cylindrical surface structure:

[0119] x = 400 cos ( 2.5 s ′ ) y = 400 sin ( 2.5 s ′ ) z ...

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Abstract

The invention discloses a space hole optimization design method of a thin-wall curve-surface structure with holes, aiming at solving the technical problems that a fitted curve around a hole can not ensure to be always positioned on a given curve and a curve around a space hole is difficult to resolve and express in the hole optimization design on the conventional curved-surface structure. The method adopts design schemes that: design variables are defined on an internal parameter plane of a curve surface, and the space hole optimization design problem is equivalently simplified into a plane hole optimization design problem by adopting a parameter mapping method, therefore, the hole optimization design problem on any thin-wall curved-surface structures is solved, and compared with the prior art, the maximum equivalent stress of a finite element model of thin-wall conical curved-surface structures with holes and same size is greatly reduced.

Description

technical field [0001] The invention relates to a space hole shape optimization design method, in particular to a space hole optimization design method for a thin-walled curved surface structure with holes, which is suitable for the optimal design of holes on any thin-walled curved surface structure in space. Background technique [0002] In the design of aerospace vehicle power equipment, there are a large number of engineering application examples of hole optimization design on thin-walled curved surface structures such as maintenance holes, process holes, and cooling holes. The existence of holes will inevitably lead to problems such as stress concentration around the holes, which directly affects the service life of the structure. In addition, the selection of hole size is directly related to the weight of the structure, which is especially important for the weight reduction of aerospace structures. [0003] Document 1 "The coupling of geometric descriptions and finite ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张卫红王丹王振培杨军刚
Owner JIANGSU SHUANGNENG SOLAR ENERGY
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