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Steam turbine rotor automatic meshing system and method

A steam turbine rotor, automatic division technology, applied in image data processing, special data processing applications, instruments, etc.

Active Publication Date: 2018-06-22
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the grid division that can guarantee the accuracy of finite element simulation for steam turbine rotors of different sizes cannot be performed under the condition of less calculation amount, the present invention

Method used

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  • Steam turbine rotor automatic meshing system and method
  • Steam turbine rotor automatic meshing system and method
  • Steam turbine rotor automatic meshing system and method

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0055] Turbine rotor mesh automatic division system, including:

[0056] The rotor model feature acquisition module automatically collects and imports the feature information of the rotor model, including the coordinates of each end point of the rotor model, the length and angle of each feature side, and other feature information;

[0057] The eigenvalue analysis module numbers each characteristic edge and characteristic node and classifies the characteristic edges according to the characteristic coordinates, and at the same time obtains the length information of each characteristic edge, and compares the length n of each characteristic edge with the length n of the preceding characteristic edge 2 , the length of the rear feature side n 3 Compare to get the pre-feature ratio post feature ratio

[0058] Feature side distribution module, the pre-feature ratio R 1 and post-characteristic ratio R 2 Enter the logic library to find the most suitable seeding method, and contro...

specific Embodiment approach 2

[0074] The method for automatically dividing the grid of the steam turbine rotor includes the following steps:

[0075] Step 1. Apply modeling software such as UG to establish a rotor model;

[0076] Rotor models with different properties can be established according to the rotor form. For T-shaped blade roots and double-T-shaped blade roots, a two-dimensional axisymmetric model can be established, and for a palm-shaped leaf root, a three-dimensional circular symmetric model can be established; the established The rotor model is stored in stp format and imported into the steam turbine rotor mesh automatic division system;

[0077] Step 2, feature classification and feature value analysis:

[0078] Step 2.1, automatically collect the characteristic information of the imported rotor model, including the coordinates of each end point of the rotor model, the length of each characteristic side, angle and other characteristic information;

[0079] Step 2.2. Number each characteris...

specific Embodiment approach 3

[0100] The limiting maximum deviation factor described in step 2 of this embodiment is 0.1.

[0101] Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses a steam turbine rotor automatic meshing system and method and relates to meshing systems and methods. The automatic meshing system and method aim to solve the problem that currently, meshing with a guarantee on finite element simulation precision cannot be performed according to steam turbine rotors of different sizes. The system comprises a rotor model feature acquisitionmodule used for collecting feature information imported into a rotor model; a feature value analysis module used for numbering all feature edges and feature nodes and classifying the feature edges according to feature coordinates; a feature edge seed distribution module used for inputting a front feature ratio and a back feature ratio into a logic library to find a most appropriate seed distribution mode, performing curvature control on seeds and taking charge of feature edge seed distribution; the logic library used for performing logic judgment on the front feature ratio R1 and the back feature ratio R2; a meshing module used for dividing hexahedral meshes for a feature model and limiting geometric eccentric factors; and a mesh information storage module used for storing node numbers, adopted to divide seed units, into a unit database. The automatic meshing system and method are suitable for steam turbine rotor automatic meshing.

Description

technical field [0001] The invention relates to a grid division system and method, in particular to a steam turbine rotor grid automatic division system and a division method. Background technique [0002] The finite element method has now become an important means of calculating the strength of the steam turbine rotor in the steam turbine industry. Mesh division, as a limiting condition for the calculation accuracy of the finite element, has also been paid more and more attention. grid. At present, the domestic steam turbine rotor grid division is still in the manual division stage, and the rotor automatic grid division system is still in a blank stage. The main reason is: the structure of the steam turbine rotor is complex and the form is not uniform, and there are many functional structures, so it is impossible to establish a unified The large size and small size of the steam turbine rotor differ by more than an order of magnitude, so it is impossible to form a unified s...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/20
CPCG06T17/20G06F30/17G06F30/23
Inventor 宋为平初世明郑宏伟李光磊赵建立李岩刘海旭
Owner HARBIN TURBINE