Secondary processing method of Nastran software flutter calculation data

A technology of flutter calculation and secondary processing, which is applied in the direction of electrical digital data processing, special data processing application, calculation, etc., to achieve the effect of improving work efficiency and accuracy

Active Publication Date: 2017-02-01
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology

[0003] The purpose of the present invention is to provide a secondary processing method of Nastran software

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  • Secondary processing method of Nastran software flutter calculation data
  • Secondary processing method of Nastran software flutter calculation data
  • Secondary processing method of Nastran software flutter calculation data

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[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention discloses a secondary processing method of Nastran software flutter calculation data, and relates to the technical field of flutter calculation. The secondary processing method of Nastran software flutter calculation data comprises the following steps of 1, obtaining a target file; 2, obtaining a parameter input by a user; 3, judging whether the parameter is reasonable or not; 4, reading a target file; 5, storing the read speed, damping and frequency sequences into a vg matrix and a vf matrix; 6, judging whether the mode in the matrix is a rigid body mode or not; 7, solving the flutter speed, the flutter frequency and the flutter speed pressure; 8, outputting required parameters to the first text file; 9, solving data corresponding to all modes; 10, outputting the matrix to a second text file according to a preset format; 11, judging whether the drawing is needed or not; 12, performing drawing. The secondary processing method has the advantages that a user can directly obtain the flutter speed, the flutter frequency and the flutter speed pressure, and can draw a v-g figure and a v-f figure.

Description

technical field [0001] The invention relates to the technical field of chatter calculation, in particular to a secondary processing method for chatter calculation data of Nastran software. Background technique [0002] Nastran software is one of the most commonly used finite element tools in the process of aircraft design, and it is also used most in flutter calculations, but its post-processing of calculation results is not perfect, which is mainly caused by the following shortcomings: a. The flutter velocity and flutter frequency are not directly given. Due to its calculation results, the "*.f06" file only gives the sequence of physical quantities such as reduced frequency, damping, and frequency at a given speed for each order mode, but there is no corresponding speed for 0 damping, 2% damping, and other custom damping and frequency, need to be interpolated in the later stage; b. The commonly used v-g and v-f curves are not given, and need to be manually imported into ot...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王赫喆赵铁铭苍峰于佳鑫胡鑫
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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