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A Form Creation Method of Free-form Surface Considering Damage

A free and curved surface technology, applied in the direction of instrumentation, design optimization/simulation, calculation, etc., can solve problems such as unsafe structural design, reduced structural stiffness, and failure to take into account

Active Publication Date: 2019-05-03
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such methods do not take into account the microscopic damage to the material that occurs during the creation of freeform surfaces as loads are applied and deformations accumulate
The damage of the material will directly lead to the decrease of the structural stiffness, so if the influence of the weakening of the material on the structural design is not considered, the structural design will be unsafe.

Method used

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  • A Form Creation Method of Free-form Surface Considering Damage
  • A Form Creation Method of Free-form Surface Considering Damage
  • A Form Creation Method of Free-form Surface Considering Damage

Examples

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specific Embodiment

[0266] Suppose a concrete free-form surface shell structure, the maximum longitudinal span L is 20m, and the maximum horizontal span B is 16m. Elastic modulus of shell concrete E=3×10 10 N·m -2 , Poisson's ratio μ=0.2. The thickness of the concrete shell is t = 0.1m. The shell is subjected to a vertical uniform load, and the two longitudinal sides are simply supported. The initial surface shape of the structure is like figure 2 As shown, figure 2 (A) and (b) are the front view and top view of the free structure, respectively.

[0267] The position of the control points created by the free surface is as figure 2 The hollow circle in (b) is shown. The optimization goal is the minimum structural strain energy. Free-form surface structure takes uniform load q = 120KN / m 2 , To optimize the free-form surface structure. The optimization results considering the mazars damage model and the optimization results without considering the mazars damage model are as follows image 3 As sh...

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Abstract

The invention provides a damage considering free-form surface form establishing method. Considering microscopic damage of a material in the free-form surface establishing process with load exertion and deformation accumulation, it can be ensured that the stress performance and integral rigidity of a free-form surface are locally optimum in damaged free-form surface establishment, a free-form surface establishing result is slightly unsafe in an existing establishing method due to the fact that the damage of the free-form surface is not considered, and the shortcoming can be overcome by adopting the technical scheme.

Description

Technical field [0001] The invention relates to a free-form surface shape creation method, in particular to a free-form surface shape creation method considering damage. Background technique [0002] The current free-form surface structure morphology creation methods at home and abroad can be summarized as the following two: [0003] 1. Physical methods based on experiments, that is, use engineering experience or physical experiments as the main means to consciously determine a reasonable structure shape; [0004] 2. Numerical optimization method, that is, based on computer technology, using computer graphics and structural optimization as means to create a reasonable structure. [0005] In the existing free-form surface morphological structure creation methods, the free-form surface models are analyzed and optimized by linear elastic methods. This type of method does not take into account the microscopic damage of the material during the creation of the free-form surface with the ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 伞冰冰吴泽球邱冶殷丽伟
Owner HOHAI UNIV