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Method for determining thin-walled structure high-rigidity connecting area load transfer

A thin-walled structure and connection area technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unreasonable load distribution results, inability to transmit bending moments and torques, and difficulty in setting weights. Achieve the effect of obvious practical value and significance

Inactive Publication Date: 2015-05-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2. Bending moment and torque cannot be transmitted. Bending moment and torque play a very important role in the analysis of mechanical properties of thin-walled structures. Ignoring the influence of bending moment and torque on thin-walled structures will lead to unreasonable analysis results and even errors.
[0006] 3. The determination of weights is subjective, and different weights will produce different calculation results
Unreasonable load distribution results are obtained because it is difficult to give reasonable weights

Method used

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  • Method for determining thin-walled structure high-rigidity connecting area load transfer
  • Method for determining thin-walled structure high-rigidity connecting area load transfer
  • Method for determining thin-walled structure high-rigidity connecting area load transfer

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Embodiment Construction

[0042] Describe the present invention below in conjunction with specific embodiment:

[0043] This embodiment is the thin-walled structure of the aircraft wing mounted with the engine. For the thin-walled structure of the aircraft class, since the rigidity of the engine, landing gear and missile is usually much greater than the rigidity of the thin-walled structure of the wing, rigidity assumptions can be made, and these Rigid body loads are transferred to the thin-walled primary structure.

[0044] The CAD data of the wing is established by CATIA software. The wing is mainly composed of upper and lower skins, front and rear spar webs and rib webs. The main parameters of the wing are as follows: the span length is 1.196m, the root chord length is 0.814m, the wingtip chord length is 0.457m, the leading edge sweep angle is 30°, the trailing edge sweep angle is 15.8°, no twist angle, Mongolia The skin thickness is 0.002m, the wing rib thickness is 0.0015m, and the beam web thick...

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Abstract

The invention provides a method for determining thin-walled structure high-rigidity connecting area load transfer, wherein the rigidity property of a thin-walled structure is condensed into a connecting area through a rigidity matrix condensation technology, so that the condensing rigidity of the connecting area is obtained accurately, and the unreasonable setting process to weighting average constraint element local rigidity weight by people is avoided. After the condensed rigidity property is obtained, load distribution can be performed according to the bearing capacity of joint rigidity through a load rigidity distribution principle, so that a reasonable and effective high precise load transfer result is obtained; the obvious practical value and significance in aeronautic and astronautic thin-walled structure engineering analysis are available.

Description

technical field [0001] The invention relates to the technical field of finite element analysis of large-scale engineering thin-walled structures, in particular to a method for determining the load transfer in a high-rigidity connection area of ​​a thin-walled structure, and in particular to a discretization processing unit which eliminates the discretized finite element analysis of thin-walled structures The ill-conditioned matrix characteristics in the middle and high stiffness connection regions can accurately distribute the inertia or external loads imposed by the structural high stiffness connection members to the thin-walled main structure. Background technique [0002] Using the finite element method to establish a discrete numerical analysis model of an actual engineering structure, and implement structural design analysis and strength calculation has become a typical advanced design technology and method of modern structural engineering. In the preliminary design sta...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 何鹏秋孙秦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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