Blade overall flexible deformation method based on mean camber line

A blade and arc technology, applied in the field of geometric modeling of aero-engine blades, can solve the problems of inability to fully describe the deformation of the blade, unable to adapt to the local adjustment of the blade model, etc., and achieve the effect of high positioning accuracy

Active Publication Date: 2022-06-28
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problem that the existing blade geometric modeling technology cannot fully describe the blade deformation and cannot adapt to the local adjustment of the blade model, the present invention provides a method based on The overall flexible deformation method of the blade in the middle arc

Method used

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  • Blade overall flexible deformation method based on mean camber line
  • Blade overall flexible deformation method based on mean camber line
  • Blade overall flexible deformation method based on mean camber line

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Embodiment Construction

[0055] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments are exemplary and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

[0056] In the embodiment of the present invention, the measured blade and the designed blade are in the same coordinate system, and the corresponding relationship between the measured blade section line and the designed blade section line and the section position are provided externally. Specifically, a method for flexible deformation of a blade as a whole based on a mid-arc line of the present invention includes the following steps:

[0057] Step 1. Obtain the discrete points of the design blade

[0058] Obtain any set of section lines corresponding to the designed blade and the measured blade, and extract the mid-arc line of the designed blade section line, discretize the mid-arc line of the de...

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Abstract

The invention provides a blade overall flexible deformation method based on a mean camber line, and solves the problems that an existing blade geometric modeling technology cannot completely describe the blade deformation condition and cannot adapt to local adjustment of a blade model. The method comprises the following steps: 1) obtaining discrete points of a designed blade; 2) searching a nearest point p0 of a discrete point on a section line and an arbitrary vector n0 of the point; 3) torsional deformation calculation and section line deformation; 4) carrying out buckling deformation calculation and section line deformation; 5) calculating expansion deformation and deformation of a section line; 6) calculating a deformation displacement field; 7) obtaining a deformation displacement field; 8) designing blade deformation; 9) traversing all section lines of the designed blade, and deforming all section lines of the designed blade; according to the method, the transformation matrix is calculated by using the composite deformation of torsion, warping and expansion and contraction, so that the overall flexible deformation of the blade geometric model is realized, and the actual shape of the processed blade is better met.

Description

technical field [0001] The invention relates to the geometric modeling technology of aero-engine blades, in particular to an overall flexible deformation method of a blade based on a mid-arc line. Background technique [0002] In the manufacturing process of aero-engine, some blades will be used as a positioning reference for secondary processing after a certain process, such as the processing of the leading and trailing edges of precision forging blades, and the processing of air film holes of turbine blades. Limited by the existing technology, there is a certain deformation error in the geometric profile of the blade after manufacturing. Even if the tolerance requirements are met, a new positioning error will be introduced for the secondary processing, which will affect the subsequent processing accuracy. Therefore, deforming and reconstructing the blade design geometric model and accurately identifying the positioning area are effective means to improve the secondary mach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F17/16
CPCG06F30/17G06F17/16
Inventor 王晶侯尧华赵卫赵华龙
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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