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Method for rapidly and precisely calculating section and mass attribute of revolving body

A technology of quality attributes and calculation methods, which is used in calculations, complex mathematical operations, special data processing applications, etc., and can solve problems such as slow solution speed and loss of solution accuracy.

Active Publication Date: 2018-11-23
XI AN JIAOTONG UNIV
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of slow solution speed and loss of solution accuracy in the process of solving the cross section and mass attributes of a rotary body, and provide a fast and accurate calculation method for the cross section and mass attributes of a rotary body,

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  • Method for rapidly and precisely calculating section and mass attribute of revolving body
  • Method for rapidly and precisely calculating section and mass attribute of revolving body
  • Method for rapidly and precisely calculating section and mass attribute of revolving body

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Embodiment Construction

[0085] The present invention is described in further detail below in conjunction with accompanying drawing:

[0086] see figure 1 , the method for fast and accurate calculation of the cross-section and mass properties of the revolving body of the present invention includes the following steps:

[0087] Step 1: Preprocessing the CAD drawing of the section of the rotary body;

[0088] Such as figure 2 As shown, the specific method of step 1 is as follows:

[0089] Make the axis of the rotating body coincide with the x-coordinate axis (it can also coincide with other axes, all formulas in the present invention are completed with reference to the coincidence of the axis and the x-coordinate axis), the scale of the drawing is scaled to 1:1, and the inclusions other than the boundary line of the section of the rotating body are removed Section lines, dimensions, labels, axes, etc., delete the part of the section in the third and fourth quadrants. And then generate DXF format fi...

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Abstract

The invention discloses a method for rapidly and precisely calculating the section and the mass attribute of a revolving body. By means of the method, attribute parameters of the revolving body, suchas the sectional area, the mass, the gravity centre axial position, the polar rotational inertia and the diameter rotational inertia, are calculated rapidly and accurately according to information ofthe revolving body, such as the sectional view and the material density. According to the method, after the CAD drawing of the pre-processed section of the revolving body is imported, starting pointsof various line segments on the section boundary are sequentially extracted in the counter-clockwise direction; a section boundary node coordinate set is obtained; and thus, various attribute parameters are calculated according to a formula obtained by derivation. According to the method in the invention, the two-dimensional surface integral and the three-dimensional volume integral of the revolving body can be converted into one-dimensional line integrals; the integral difficulty due to the irregular shape of the revolving body and the like can be avoided; calculation is relatively rapid; furthermore, only section boundary information is needed; precision loss of pixelated subdivision is avoided; and calculation is relatively precise.

Description

technical field [0001] The invention belongs to the technical field of digital mechanical design, and relates to a fast and accurate calculation method for the section and quality attributes of a revolving body. Background technique [0002] The rotordynamic calculation of mechanical products such as machine tool spindles and aero-engines is a key link in the design and analysis process. In the calculation, it is necessary to input the mass, axial position of the center of gravity, polar moment of inertia, diameter moment of inertia and other attribute parameters of each rotating body part. At present, the main CAD software integration method is used to solve these parameters, that is, firstly divide the rotating body into small regular shapes, and then calculate the small shapes separately and then accumulate and superimpose. This method often involves the solution of two-dimensional area integrals and three-dimensional volume integrals. Calculation, resulting in a huge am...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/16
CPCG06F17/16G06F30/17
Inventor 裴世源孙岩辉洪军郭俊康苗强南凯刚
Owner XI AN JIAOTONG UNIV
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