A kind of production method of fabric substrate in architectural space membrane structure

Abstract

The invention discloses a production method of a fabric base material in a building space membrane structure. The production method comprises the following steps: designing the fabric base material structure in the space membrane structure; Establishing a strain energy density and total potential energy functional of a unit cell; Obtaining tensile stiffness, bending stiffness and pull-pull stiffness of a unit cell Bending coupling stiffness; Obtaining a first-order warping function node value expression and first-order approximate energy strain energy density; Reconstructing a three-dimensional local displacement field, a local strain field and a local stress field of the fabric substrate structure in the spatial membrane structure; And when the fabric base material structure in the spacefilm structure meets the preset performance requirement, manufacturing the fabric base material in the space film structure according to the fabric base material structure in the space film structure.Effective material attributes are obtained through microscopic analysis of the unit cells, so that the number of units of the finite element model and the total degree of freedom during global analysis are greatly reduced. The uniform structure is used for replacing an original heterogeneous structure to carry out global behavior analysis, so that the efficiency of calculating the performance ofthe fabric base material in the membrane structure is greatly improved.

Description

technical field [0001] The invention relates to the technical field of material production methods, in particular to a production method of fabric substrates in architectural space membrane structures. Background technique [0002] Membrane structure is a brand-new building structure form using new materials developed in the past ten years. The key to the research and application of membrane structure is the material problem. Membrane materials are mainly divided into two categories: fabric substrates and foils. Among them, fabric substrates are produced by plain weaving or curved weaving, which has a long history so far. Fabric substrates not only have a lower in-plane stiffness ratio than unidirectional composites, but also have better out-of-plane properties. Fabric substrates have higher fracture toughness and impact resistance than easily delaminated laminated composites. Another major advantage of the fabric substrate is that the required structural shape can be wove...

AI Technical Summary

Problems solved by technology

In the prior art, the designed membrane structure is usually directly subjected to finite element analysis. However, this method requires a large-scale finite element model, and has a large amount of calculation and low efficiency, so it is not an effective and feasible method.

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