A two-dimensional finite element modeling method for wide-chord fan blades

A technology of fan blades and modeling methods, which is applied in the field of aero-engines, can solve problems such as the inconsistency between the disc stress and the real structure, and the inaccurate simulation of the real blade mass and stiffness distribution, so as to improve the strength simulation accuracy and the operation method is simple and easy , the effect of clear technical principles

Active Publication Date: 2021-08-03
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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  • A two-dimensional finite element modeling method for wide-chord fan blades
  • A two-dimensional finite element modeling method for wide-chord fan blades
  • A two-dimensional finite element modeling method for wide-chord fan blades

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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 aero-engines, and in particular relates to a two-dimensional finite element modeling method for wide-chord fan blades. A 2D finite element modeling method suitable for wide-chord fan blades, including the following steps: 1. 2D finite element mesh division, 2. 3D blade thickness information extraction, 3. 2D finite element mesh thickness mapping, 4. Blade centrifugal force Compensation correction. It can truly simulate the three-dimensional mass and stiffness distribution of wide-chord fan blades, so that the fan disc stress calculated by the two-dimensional finite element model conforms to the actual situation; its technical principle is clear, the operation method is simple and easy, and it is suitable for engineering applications; it can also be promoted To the two-dimensional finite element modeling of the rest of the blade structure, improve the strength simulation accuracy of engine 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 Patents(China)
IPC IPC(8): G06F30/23
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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