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A Method for Solving Displacement Parameters of Nonlinear Large Rigid Body

A rigid body displacement and nonlinear technology, applied in the field of solving nonlinear large rigid body displacement parameters, can solve the problems of increased error in parameter calculation, inability to apply common phases to adjust large rigid body displacement conditions, and unfixed solution accuracy, etc., to achieve separation The effect of node rigid body displacement and deformation, broad application prospects and market value

Active Publication Date: 2022-03-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The present invention provides a non-linear large rigid body to solve the problems that the existing method cannot be applied to the large rigid body displacement working condition of common phase adjustment; the solution accuracy is not fixed and the parameter calculation error increases with the increase of the rigid body displacement. Displacement parameter solution method

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  • A Method for Solving Displacement Parameters of Nonlinear Large Rigid Body
  • A Method for Solving Displacement Parameters of Nonlinear Large Rigid Body
  • A Method for Solving Displacement Parameters of Nonlinear Large Rigid Body

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specific Embodiment approach 1

[0059] Specific implementation mode 1. Combination Figure 1 to Figure 3 Describe this embodiment, a method for solving the displacement parameters of a nonlinear large rigid body, using the parameter analysis problem of the finite element simulation results of a mirror rotated 30° around the x-axis, the deformation nephogram of the finite element analysis results is as follows figure 2 shown.

[0060] Firstly, the object to be solved is determined. In practical engineering applications, the deformation state of the optical surface of the mirror is taken as the main research object. The specific process is:

[0061] Step 1. Extract the initial coordinate vectors of all nodes on the optical surface of the mirror Node deformation vector

[0062] Import the nodal deformations as input conditions into the solver:

[0063]

[0064] In the formula, i is an integer greater than 1 and less than n, is the deformed position vector;

[0065] Step 2. Determine the initial it...

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Abstract

A method for solving nonlinear large rigid body displacement parameters, which relates to the field of aviation and aerospace optical-mechanical structure simulation, is used for rigid body displacement analysis of surfaces, bodies and nodes in finite element simulation results, and can analyze structural parts under specific working conditions Rigid body displacement. The method mainly includes information input; determining initial iteration parameters; setting iteration termination conditions; introducing initial iteration parameters; iterative convergence judgment; calculating the position residual of deformed nodes; Afterwards, iterative convergence determination and other steps are carried out. The method of the present invention can solve and calculate the rigid body displacement parameters of the object in the finite element simulation analysis results, and is not limited by linear approximation constraints, and can solve the displacement parameters within ±90°. Large rigid body angular displacement parameters and arbitrary range rigid body translation parameters.

Description

technical field [0001] The invention relates to the field of aviation and aerospace optical-mechanical structure simulation, in particular to a method for solving nonlinear large rigid body displacement parameters, which is used to complete the analysis of rigid-body displacement and deformation parameters of optical-mechanical structural parts in finite element simulation results, thereby guiding the optical-mechanical structure. Further design and optimization. Background technique [0002] In order to break through the limitations of the carrier on the space remote sensor, a split optical system using spliced ​​primary mirrors emerged as the times require, and has attracted great attention from all over the world. The most representative James Webb Astronomical Telescope (JWST) uses split optics An outstanding representative of the system. While the split optical system brings caliber dividends, it also poses a huge challenge to the design of the optical-mechanical struc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23
Inventor 杨会生刘柏旭庞新源陈曦
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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