Modeling method of surface fold morphology of square solar sail

A modeling method and folding technology, applied in the field of mechanical engineering, can solve problems such as the influence of analysis results and difficult solutions

Active Publication Date: 2016-09-28
XIDIAN UNIV
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Problems solved by technology

The first way can analyze the folds through general-purpose software, but the defects introduced will affect the analysis results. The second way does not need to introduce any defects, but the bifurcation law needs to be introduced in the analysis process to track the bifurcation path, it is more difficult to solve

Method used

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  • Modeling method of surface fold morphology of square solar sail
  • Modeling method of surface fold morphology of square solar sail
  • Modeling method of surface fold morphology of square solar sail

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Embodiment Construction

[0107] refer to figure 1 The structure diagram of the two-stage drive hard disk drive shown is mainly composed of three parts: a film sail 1 , a support beam 2 , and a control block 3 .

[0108] The invention provides a modeling method for the surface fold shape of a square solar sail, the method steps and technical principles thereof are as follows:

[0109] (1) Airy stress field distribution theory

[0110] Assume that a point O on the planar structure with infinite size in the lower half space 1 Apply an upward pulling force T along the Y axis at , and the stress equivalence circle given in the traditional stress field model is defined as, taking the force application point O 1 is the center of the circle, a point arbitrarily selected in the lower half plane to O 1 Draw a circle with the radius as the distance, and get a set of concentric circle models, such as figure 2 As shown in a, the model can only approximate the average stress value and cannot accurately describ...

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Abstract

The invention discloses a modeling method of the surface fold morphology of a square solar sail. The modeling method comprises the following steps: firstly, aiming at a square film solar sail structure, determining a stress field distribution cloud picture of the square film solar sail structure so as to obtain a fold area; and secondly, putting forward a new fold morphology description equation, and establishing a fold morphology model which is closer to practical situations by introducing an exponential decay function. The method utilizes an Airy stress field distribution theory, eliminates boundary influence through a stress superposition rule, and obtains the stress filed distribution cloud picture of the film solar sail structure so as to further determine the fold area. On the basis, a more accurate fold morphology description equation is put forward, the generalized equation of a film fold parameter is established on the basis of a vonKarman large deflection equation, a stress extremum method is adopted to obtain a relational model of the fold morphology and fold direction tensile stress, the modeling method is simple in solving, and meanwhile, the obtained fold morphology is closer to the practical situations.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and relates to a modeling method for the surface wrinkle shape of a solar sail structure, in particular to a modeling method for the surface wrinkle shape of a square solar sail, which is used to more accurately describe the surface wrinkle shape. Background technique [0002] Solar sails need to obtain propulsion through weak sunlight pressure, so solar sails are required to have a large sail surface and light structural quality, and film materials have become a popular choice for light weight, small storage volume, low cost, and easy folding. Ideal sail material. However, the bending stiffness of the film is small, and it is prone to local instability when subjected to external loads to cause wrinkles. The photon scattering caused by the film wrinkles makes the effective thrust generated by the solar sail significantly reduced. Therefore, accurately describing the deformation mechanism of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/00
CPCG06F30/17G06F30/367G06T17/00G06T2210/44
Inventor 黄进刘明君王雅丽
Owner XIDIAN UNIV
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