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Cabin butt-joint bolt connection looseness simulation method under basic excitation

A technology for connecting loose and butt bolts, used in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as preload reduction

Active Publication Date: 2019-07-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can be effectively equivalent to the bolted connection under normal working conditions, they are powerless to reduce the pre-tightening force caused by loosening.

Method used

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  • Cabin butt-joint bolt connection looseness simulation method under basic excitation
  • Cabin butt-joint bolt connection looseness simulation method under basic excitation
  • Cabin butt-joint bolt connection looseness simulation method under basic excitation

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] In the present invention, the method for simulating the connection loosening of the butt joint bolts of the cabin section under foundation excitation comprises the following steps:

[0031] S1. First establish the 3D geometric model of the butt joint bolt connection structure of the cabin, such as Figures 1 to 3 As shown, the 3D geometric model includes the 3D geometric model of the connected part and the 3D geometric model of the bolted joint, and the connected part includes an upper connected plate (1) and a lower connected plate (2), both of which are L shaped plate, corresponding positions on its long sides (1-1) and (1-2) are respectively provided with circular holes of the same size to form through holes; the bolted connectors include screw rods (3) and nuts (4); The connected plate (1) is connected with the low...

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PUM

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Abstract

The invention discloses a cabin butt-joint bolt connection looseness simulation method under basic excitation. The method comprises the following steps: S1, establishing a 3D geometric model of a cabin butt-joint bolt connection structure; S2, establishing a finite element model of the bolt connection structure according to the 3D geometric model of the bolt connection structure; and S3, carryingout contact finite element modeling according to the finite element model of the bolt connection structure, and carrying out bolt connection looseness simulation calculation. According to the cabin butt-joint bolt connection looseness simulation method under basic excitation, the phenomenon that a pre-tightening force is reduced in a cabin butt-joint bolt connection looseness process is simulatedthrough the simulation method, and the design of a cabin butt-joint bolt connection structure under basic excitation can be effectively guided.

Description

technical field [0001] The invention belongs to the field of finite element simulation, and in particular relates to a method for simulating the loosening of cabin butt joint bolt connections under foundation excitation. Background technique [0002] As one of the most common fastening methods, bolts are widely used in aerospace, civil engineering, mechanical engineering and other fields. The bolted connection under normal working conditions can reliably complete the force transmission between the connected structures, which depends on the large enough clamping force on the contact surface, and the application of the clamping force is realized by tightening the bolts, so the bolts A sign of joint failure is a drop in bolt preload. Except in extreme cases where the bolts are broken and the teeth are broken leading to the disappearance of the pre-tightening force, in more cases the pre-tightening force slowly decreases with the increase of service time. This phenomenon is cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 费庆国胡阳姜东曹芝腑王旻睿
Owner SOUTHEAST UNIV
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