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A Method for Determining Load Transfer in High Rigid Connection Zones of Thin-Walled Structures

A thin-walled structure and load transfer technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unreasonable load distribution results, inability to transfer bending moment and torque, and different calculation results, etc., to achieve obvious Effects of practical value and meaning

Inactive Publication Date: 2017-11-07
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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  • A Method for Determining Load Transfer in High Rigid Connection Zones of Thin-Walled Structures
  • A Method for Determining Load Transfer in High Rigid Connection Zones of Thin-Walled Structures
  • A Method for Determining Load Transfer in High Rigid Connection Zones of Thin-Walled Structures

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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 that mounts the engine. For the thin-walled structure of the aircraft class, since the stiffness of the engine, landing gear and missile is usually much greater than the stiffness 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 beam 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 thic...

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Abstract

The invention proposes a method for determining the load transfer in the high-stiffness connection area of ​​a thin-walled structure. Through the stiffness matrix polycondensation technology, the stiffness characteristics of the thin-walled structure are condensed to the connection area, thereby accurately obtaining the polycondensation stiffness of the connection area, avoiding the Artificially setting the unreasonable weight value of the local stiffness of the weighted average constraint element. After obtaining the stiffness characteristics after shrinkage, the load can be distributed according to the load stiffness distribution principle and the bearing capacity of the node stiffness, and then reasonable and effective high-precision load transfer results can be obtained, which has obvious significance in the engineering analysis of aerospace thin-walled structures Practical value and significance.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 何鹏秋孙秦
Owner NORTHWESTERN POLYTECHNICAL UNIV