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Mesh division method for multilayer multi-pass welding finite element model of header tube socket

A multi-layer multi-pass welding and grid division technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of improving the grid generation time and reducing the number

Pending Publication Date: 2021-07-23
SHIHEZI UNIVERSITY
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Problems solved by technology

[0003] The invention proposes a grid division method for multi-layer multi-pass welded finite element model of header pipe seat to solve the technical problem of how to ensure the quality of grid division and improve the speed of grid division

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  • Mesh division method for multilayer multi-pass welding finite element model of header tube socket
  • Mesh division method for multilayer multi-pass welding finite element model of header tube socket
  • Mesh division method for multilayer multi-pass welding finite element model of header tube socket

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Embodiment Construction

[0023] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] This embodiment proposes a grid division method for the multi-layer multi-pass welded finite element model of the header pipe seat. The grid division method specifically includes the following steps:

[0025] S1. Establish the finite element model of the saddle-shaped multi-layer multi-pass welding of the header pipe seat; use Solidworks software to carry out the three-dimensional modeling of the finite element model of the multi-layer multi-pass welding of the header pipe seat. Among them, the size of the header is selected as φ350×12×1000mm, the size of the pipe seat is DN80×15mm, there is no blunt edge, no weld gap, the groove angle is 42°, the weld shape is a saddle-shaped space curve, and the weld is divided ...

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Abstract

The invention provides a mesh division method for a multilayer multi-pass welding finite element model of a header tube socket. The mesh division method comprises the following steps: establishing a finite element model of a saddle-shaped welding seam of the header tube socket; dividing the established finite element model of a saddle-shaped welding seam of the header tube socket into three parts, namely a welding seam area, a heat affected area and a base metal area; and carrying out mesh division on each segmented part. According to the method, the mesh region division sequence and the mesh generation minimum size are reasonably set, the mesh can be successfully generated, the generated mesh number is effectively reduced, the mesh generation time is shortened, and a foundation is laid for subsequent numerical calculation.

Description

technical field [0001] The invention belongs to the technical field of metal welding finite element modeling, and in particular relates to a grid division method for a multi-layer multi-pass welding finite element model of a header pipe seat. Background technique [0002] Traditionally used branch pipe connections such as equal-diameter tees, different-diameter tees, and reinforcing plates have relatively large defects in long-term use, and pipe sockets, as a reinforced branch pipe connection structure, have unique advantages. It is widely used in the caliber and thick-walled pipes. Generally, the connection between the connecting pipe and the main pipe is a plug-in connection, while the header connection of the header is a groove butt connection, also known as a placement or a saddle connection, and a saddle-shaped weld is formed at the header header. This kind of weld is thicker, the stress distribution is more complicated, there is a serious stress concentration phenomen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/18G06F30/23G06F113/14
CPCG06F30/18G06F30/23G06F2113/14
Inventor 胡雪买春亮郑雄飞
Owner SHIHEZI UNIVERSITY
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