Structural finite-element parametric modeling method applicable to grating-configuration rudder surface

A parametric modeling and parameterization technology, applied in 3D modeling, image data processing, electrical digital data processing, etc., can solve problems such as difficulties in realizing real model parameterization

CN107491616AActive Publication Date: 2017-12-19BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-12-19

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Abstract

The invention discloses a structural finite-element parametric modeling method applicable to a grating-configuration rudder surface. According to the method, a mapping transformation method based on a finite element model and a parametric approach to achieving conversion from two-dimensional mesh parameterization division to three-dimensional appearance expansion are adopted. The method includes the steps of specifically conducting two-dimensional plane projection on the grating-configuration rudder surface, extracting characteristic parameters, and conducting two-dimensional parameterization division; building a mapping relation between a two-dimensional finite element mesh and a three-dimensional finite element mesh, designing a numbering rule for finite element mesh points, and achieving conversion from the two-dimensional mesh to the three-dimensional appearance expansion; by means of a high-level computer language program, implementing the structural finite-element parametric modeling procedures for the grating-configuration rudder surface. By using the method, in a conceptual design phase or a preliminary design phase, the structural modeling efficiency can be greatly increased, the costs of time and manpower are low, parameters of self-compiled programs can be adjusted quickly, analysis applicability is high, the obtained model is applicable to analytical calculation of structural vibration, structural dynamics and the like, and the method is applicable to grating-configuration rudder surfaces and grating-configuration airfoils.
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Description

technical field

[0001] The invention relates to a structural finite element parameterized modeling method of a rudder surface, which belongs to the field of aircraft structure finite element modeling and is suitable for the finite element parameterized modeling of a rudder surface with a grid configuration. Background technique

[0002] Aircraft design is a huge and complex project, which has the characteristics of long development cycle, high development cost, and large investment of manpower. The development of a new aircraft usually goes through the demonstration stage, the scheme stage (conceptual design and preliminary design stage), the engineering development stage (detailed design stage), the design finalization stage and the production finalization stage. Among them, the demonstration stage and the scheme stage are the main design stages. After these two design stages are completed, the entire configuration of the aircraft is basically determined, that is, the degre...

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Embodiment Construction

[0024] The purpose of the present invention is to provide a structural finite element parametric modeling method of a grid configuration rudder surface that can take into account both model complexity and versatility.

[0025] According to an embodiment of the present invention, a parametric description method based on finite elements and mapping transformation "from two-dimensional mesh parametric division to three-dimensional shape development" is proposed, and the . The model file of MSC.PATRAN software in bdf format realizes the structural finite element parametric modeling of the grid configuration rudder surface, which specifically includes the following steps:

[0026] The first step is to adjust the view of the rudder surface model, find a suitable projection surface, be able to parametrically describe the structure of the rudder surface in a two-dimensional plane, and project the rudder surface model onto the projection surface;

[0027] In the second step, according ...