Two-dimensional finite element modeling method of wide chord fan blade

A technology for fan blades and modeling methods, which is applied in special data processing applications, instruments, electrical digital data processing, etc. Improve the strength simulation accuracy, the operation method is simple and easy, and the technical principle is clear.

Active Publication Date: 2018-05-29
AECC SICHUAN GAS TURBINE RES INST
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Problems solved by technology

[0003] The present invention is aimed at analyzing the stress analysis of wide-chord fan rotors using a two-dimensional finite element model in the design of aero-engines, but not accurately simulating the mass and stiffness distribution of real blades, so that the disc stress calculated by the two-dimensional finite element model does not match the real structure To provide a 2D finite element modeling method for wide-chord fan blades

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  • Two-dimensional finite element modeling method of wide chord fan blade
  • Two-dimensional finite element modeling method of wide chord fan blade
  • Two-dimensional finite element modeling method of wide chord fan blade

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Embodiment Construction

[0023] A two-dimensional finite element modeling method suitable for wide-chord fan blades, including the following steps:

[0024] Step 1. Two-dimensional finite element mesh division

[0025] Wide chord fan rotor structure such as figure 1 , consisting of a wide-chord fan blade (1) and a disc (2). The two-dimensional structure of the wide-chord fan rotor is separated along the rim flow channel (3), where the four corner points of the wide-chord fan blade (1) meridian projection contour are arranged clockwise from the leading edge of the blade root (4), respectively Root leading edge (4), blade tip leading edge (5), blade tip trailing edge (6), blade root trailing edge (7), such as figure 2 , a Cartesian coordinate system is established with the leading edge (4) of the blade root as the origin, the X-axis is along the vertical direction, and the Y-axis is along the horizontal direction. The meridional plane is established by the meridian projection profile of the wide-cho...

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Abstract

The invention belongs to the field of an aero-engine, and particularly relates to a two-dimensional finite element modeling method of a wide chord fan blade. The two-dimensional finite element modeling method of the wide chord fan blade includes steps of 1, classification of a two-dimensional finite element grid; 2, extraction of thickness information of a three-dimensional blade; 3, thickness mapping of the two-dimensional finite element grid; 4, compensation and revision of blade centrifugal force. The two-dimensional finite element modeling method can really simulate the three-dimensional quality and rigidity distribution of the wide chord fan blade, thus the fan wheel disk stress calculated by the two-dimensional finite element model meets actual condition, the technical principle is clear, the operation method is simple and easy to practice and suitable for engineering application; the method can also be popularized to the two-dimensional finite element modeling of the rest bladetype structures, thereby improving the intensity simulation precision of engine spare parts.

Description

technical field [0001] The invention belongs to the field of aero-engines, and in particular relates to a two-dimensional finite element modeling method for wide-chord fan blades. Background technique [0002] In the design process of aero-engines, two-dimensional models are often used in the finite element stress analysis of rotor components, while the two-dimensional finite element models of blades usually use plane stress elements with thickness, and the two-dimensional model of the entire blade has the same thickness to simulate its mass centrifugal force. This two-dimensional model of the rotor blade mainly focuses on the overall centrifugal force load, and does not consider the mass and stiffness distribution of the real blade. Therefore, in the finite element stress analysis of the two-dimensional rotor model, the load distribution transmitted by the blade may be different from the real structure, or even two The stress of the disc calculated by the three-dimensional...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 潘容孙海鹤米春虎王春健
Owner AECC SICHUAN GAS TURBINE RES INST
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