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Method for calculating bearing capacity of single stringer short plate

A calculation method and technology of bearing capacity, applied in design optimization/simulation, instrument, geometric CAD, etc., can solve the problems of complex calculation process and large calculation error, and achieve the effect of accurate calculation, reduced structural weight, and improved calculation accuracy

Active Publication Date: 2021-04-23
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to provide a calculation method for the bearing capacity of a short slab with a single long truss, which can accurately calculate the real bearing capacity of a short slab with a single long truss by considering the failure mechanism of a short slab with reinforcement, and effectively overcomes the complicated calculation process of the existing method , the problem of large calculation errors

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  • Method for calculating bearing capacity of single stringer short plate
  • Method for calculating bearing capacity of single stringer short plate
  • Method for calculating bearing capacity of single stringer short plate

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Embodiment Construction

[0038] The semi-theoretical and semi-empirical engineering calculation method is widely used in the aviation field because of its convenient use and simple calculation. The calculation of the load-carrying capacity of the stiffened short slab usually adopts engineering analysis methods such as the "plate element method".

[0039] In order to be suitable for practical engineering applications, the present invention proposes a calculation method for the bearing capacity of a single long truss short slab, which includes the following steps:

[0040] Step 1. Obtain the skin thickness and section area of ​​the short slab with single long truss to be calculated, and calculate the pressure loss strength of the short slab with single long truss.

[0041] When the length of the short plate of a single long truss is short (the ratio of length to radius of gyration L / ρ is less than 20), after the local instability of the section occurs, the profile can still bear a large load until failu...

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Abstract

The invention discloses a method for calculating the bearing capacity of a single stringer short plate, and the method comprises the steps: obtaining the skin thickness and section area of a to-be-calculated single stringer short plate, and calculating the pressure loss strength of the single stringer short plate; calculating the compression stress of the single stringer short plate based on the length of the single stringer short plate, the inertia moment and area of the section and the pressure loss strength; under the condition that the single stringer short plate bears the uniform axial compression load, calculating the local buckling stress of the single stringer short plate skin; when one side of the single stringer short plate is in a free state, calculating the effective width of the single stringer short plate skin by utilizing the pressure loss strength, and calculating the effective area of the single stringer short plate skin based on the effective width; and calculating the failure load of the single stringer short plate on the basis of fully analyzing the failure mode and failure mechanism of the reinforced short plate. According to the method, the real bearing capacity of the single stringer short plate can be accurately calculated, and the problems that an existing method is complex in calculation process and large in calculation error are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of aviation design, and in particular relates to a calculation method for the bearing capacity of a single long truss short plate, which provides a data basis for the design of aircraft wing stiffened wall plates. Background technique [0002] Stiffened short plates have become the basic elements of aircraft structures due to their high specific strength and high structural efficiency, and are used in main load-bearing structures such as wing box sections, fuselage and empennage box sections. During aircraft service, short stiffened plates are often subjected to axial compression loads, and the ultimate bearing capacity after buckling is the focus of aircraft design. In order to give full play to the bearing capacity of the structure, the short stiffened plate is allowed to be designed according to post-buckling. For aircraft structural strength designers, how to accurately predict the post-buckling respons...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23G06F119/14
CPCG06F30/15G06F30/23G06F2119/14
Inventor 刘存
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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