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A simulation method for the loosening of cabin butt joint bolt connection under foundation excitation

A technology for connecting loose and butt bolts, which is applied in the field of finite element simulation and can solve problems such as pre-tightening force drop

Active Publication Date: 2020-12-08
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A simulation method for the loosening of cabin butt joint bolt connection under foundation excitation
  • A simulation method for the loosening of cabin butt joint bolt connection under foundation excitation
  • A simulation method for the loosening of cabin butt joint bolt connection under foundation 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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Abstract

The present invention disclosed a loose simulation method of the bearing bolts under the basic incentive.The method of the present invention includes steps: S1. Establish a 3D geometric model of the junction of the bolt connection structure; S2. Create the finite element model of the bolt connection structure according to the 3D geometric model of the bolt connection structure; S3. According to the bolt connection structureThe finite element model is exposed to the finite element modeling, and the bolt connection loose simulation calculation is performed.In the invention, the cabin segment is connected to the loosening simulation method under the basic incentive of the present invention, and the simulation method simulates the phenomenon of pre -tightening force during the loosening process of the loose bolt connection.Design of connection structure.

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 Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F111/04
CPCG06F30/17G06F30/23
Inventor 费庆国胡阳姜东曹芝腑王旻睿
Owner SOUTHEAST UNIV
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