Mechanical response characteristic analysis method for pod rod coiling and folding process

Abstract

The invention discloses a mechanical response characteristic analysis method for a pod rod coiling and folding process, and belongs to the technical field of structural mechanical response characteristic analysis. The analysis method comprises the following steps of: S1, according to physical characteristics of a pod rod, establishing a coordinate system and defining required variables, and constructing and forming a pod rod structure model; S2, according to the geometrical characteristics of the cross section of the pod rod and the symmetry of the structure, carrying out region division on the pod rod structure model; S3, calculating the strain of each area of the pod rod in the coiling and folding process; S4, calculating the stress and strain of each composite material laying layer in the coiling and folding process of the pod rod; and S5, calculating the total strain energy of the pod rod in the folded state. According to the method, the characteristics of the composite material are considered, the mechanical response characteristics of each laying layer of the composite material and the total strain energy of the pod rod in the folded state are obtained, and a basis can be provided for preliminary design and strength checking of the pod rod.

Description

technical field [0001] The invention belongs to the technical field of mechanical response characteristic analysis of structures, and in particular relates to a method for analyzing the mechanical response characteristic of a pod pole during the coiling and folding process. Background technique [0002] Large-scale membrane spacecraft usually use pod rods as the supporting structure of the membrane structure. Due to the large size of the membrane structure, the pod rods need to be stored inside the spacecraft together with the membrane structure when the spacecraft is launched. Pod poles are generally made of carbon fiber reinforced composite materials with high specific strength, high toughness, and low thermal expansion coefficient. Sometimes they are also called composite pod poles, which have the characteristics of light weight, high stiffness, and high storage rate. [0003] The pod rods are coiled and folded after being flattened. During the folding process, the deform...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for analyzing the mechanical response characteristics of the pod rod coiling process, aiming to solve the problems that the traditional theoretical method is not closely combined with the characteristics of the composite material, which is not conducive to the analysis of the influence of the parameters of the pod rod coiling process.

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