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Variable cross-section curved beam stability strength evaluation method

A technology of strength evaluation and variable cross-section, which is applied in the fields of instruments, geometric CAD, design optimization/simulation, etc.

Pending Publication Date: 2022-05-03
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a method for evaluating the stability and strength of variable cross-section curved beams to solve at least one problem in the prior art

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  • Variable cross-section curved beam stability strength evaluation method
  • Variable cross-section curved beam stability strength evaluation method
  • Variable cross-section curved beam stability strength evaluation method

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Embodiment Construction

[0039] In order to make the purpose, technical scheme and advantages of the implementation of the application clearer, the technical scheme in the embodiment of the application will be described in more detail in combination with the accompanying drawings in the embodiment of the application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of them. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and cannot be understood as limitations to the present application. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in the art without creative work belong to the scope of protection of the application. The embodiments of the present application are desc...

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Abstract

The invention belongs to the field of airplane structural strength, and particularly relates to a variable cross-section curved beam stability strength evaluation method. According to the method for evaluating the stability strength of the variable-cross-section curved beam, the instability load and the failure load of the variable-cross-section curved beam test model are obtained through tests, and then the instability load and the failure load of the variable-cross-section curved beam finite element model are calculated through a finite element calculation method; the finite element calculation method for the stability of the variable-cross-section curved beam is corrected according to a test measurement result, the stability of the variable-cross-section curved beam can be rapidly evaluated, structural design rationalization suggestions are provided, and a basis is provided for calculation and analysis of related structures.

Description

technical field [0001] The application belongs to the field of aircraft structural strength, in particular to a method for evaluating the stability and strength of variable section curved beams. Background technology [0002] In order to leave installation space for the engine and its equipment, curved beams connecting the structures on both sides of the engine compartment are designed under the engine. After preliminary analysis, the curved beam bears the tensile load and compressive load at both ends. Under the action of compressive load, there are stability problems. If the curved beam is unstable, the integrity of the engine compartment will be damaged and flight safety will be affected. [0003] At present, for the stability evaluation of equal section curved beam, the equal section curved beam can be equivalent to the combination of equal section rod and initial curvature column. The engineering calculation method is used to calculate the critical instability load of equal ...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/15G06F119/14
CPCG06F30/23G06F30/15G06F2119/14
Inventor 李兆远于鹏
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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