Modeling method of critical buckling load analysis model for large slenderness ratio pods

Abstract

The invention discloses a critical buckling load analysis model modeling method of a pod rod with a large length and slenderness ratio, and belongs to the technical field of structural mechanics modeling. The modeling method is divided into two steps to establish the critical buckling load analysis model of the pod rod: Step S1: Based on Euler's formula, construct the critical buckling load analysis model of the pod rod with a large slenderness ratio, and analyze the section characteristics and layup characteristics of the pod rod. , respectively obtain the moment of inertia of the pod bar section and the equivalent axial elastic modulus of the pod bar; then, the pod bar finite element model is established by the ABAQUS finite element software, and the eigenvalue buckling method is used to verify the critical buckling load analysis model of the pod bar, and compare Under different slenderness ratios, the difference between the results obtained by the pod rod finite element model and the pod rod critical buckling load analysis model was used to determine the adaptability of the pod rod critical buckling load analysis model. The invention has the advantages of small calculation amount, fast calculation speed and the like.

Description

technical field [0001] The invention belongs to the technical field of structural mechanics modeling, and in particular relates to a critical buckling load analysis model modeling method for a pod rod with a large length and slenderness ratio. Background technique [0002] With the continuous development of space activities such as space exploration, the volume and weight of spacecraft have continued to increase, and the difficulty of launch tasks has risen sharply. These circumstances make the need for a lightweight, high-stiffness, and high-accommodation space extension arm more and more urgent. The pod rod is a thin-walled tubular extension arm made of composite materials and has a lens-shaped cross-section after deployment. It has the advantages of simple structure and high stability, and has broad application prospects in the deployment process of spacecraft sails. . Due to the huge structural size of the spacecraft's sail surface, the length of the pod rod as its supp...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for modeling the critical buckling load analysis model of a pod bar with a large slenderness ratio, aiming at solving the problems of large amount of calculation, slow calculation speed, and unfavorable analysis of the critical buckling load parameters of the pod bar in the traditional method.

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