Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Hexahedron finite element grid partitioning method for simulating screw-thread fit

A grid division and hexahedron technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as complex methods, large amount of coordinate calculations, limited grid quality and simulation accuracy, and the accuracy of 3D models , to achieve the effect of improving accuracy and efficiency and improving quality

Active Publication Date: 2018-06-22
UNIV OF SHANGHAI FOR SCI & TECH
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are also technical solutions to the above problems in the prior art, for example: 1) the taper thread joint is created by creating a reference surface and the model surface to generate intersection lines, and divide the hexahedral mesh, but the three-dimensional model of the bolt and nut must be established, the mesh quality and simulation The accuracy is limited by the accuracy of the 3D model; 2) The key geometric dimensions of the bolt model are parameterized in the finite element software, but this method is relatively complicated and the coordinate calculation is large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hexahedron finite element grid partitioning method for simulating screw-thread fit
  • Hexahedron finite element grid partitioning method for simulating screw-thread fit
  • Hexahedron finite element grid partitioning method for simulating screw-thread fit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] A hexahedron finite element mesh division method for simulating screw fitting involved in the present invention will be further described below in conjunction with the embodiments.

[0041] The bolts in this embodiment are right-handed bolts with M16×95, 8 total threads, 6 contact threads, and a pitch of 2.0000 mm. The present invention is described with the finite element analysis preprocessing software Hypermesh, and the steps are as follows:

[0042] figure 1 It is a schematic diagram of the structural dimensions in the axial cross-section of a pitch internal trapezoidal thread in an embodiment of the present invention.

[0043]Step 1, collect the structural dimensions in the axial cross-section of the internal thread of a pitch under the mating state of the bolt and the nut, such as figure 1 As shown, in this embodiment, the collected structural dimensions include the following: the nominal diameter of the thread is 16.0000mm, that is, the major diameter D of the i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a hexahedron finite element grid partitioning method for simulating screw-thread fit. The method comprises the following steps: firstly, according to a distance change rule ofa thread surface and a thread axis, determining a single-layer thread cross section contour line, and using a minimum feature of a thread as the axial finite element grid size; and according to a rotation angle relation between the number of the grid layers axially partitioned within a single thread pitch and the adjacent layer, determining the circumferential finite element grid number, throughthe quadrilateral grid stretching of the bolt thread end face, forming a single-layer hexahedral grid, and performing the copy, the rotation and the node replacement on the single-layer hexahedral grid so as to obtain a single-pitch bolt hexahedral grid model; finally, according to the male-female thread tooth number, performing the copy and the translation on the single-pitch grid so as to obtaina hexahedral grid model of the whole bolt thread part. So, the hexahedron finite element grid partitioning method does not need to build a solid three-dimensional model of a male-female thread, and does not need a lot of the node coordinate calculation.

Description

technical field [0001] The invention relates to the technical field of finite element simulation, in particular to a hexahedral finite element grid division method for simulating thread fit. Background technique [0002] Threaded connection is a widely used detachable fixed connection, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. [0003] Among the connection forms between body and chassis (threaded connection, welding, riveting, gluing, etc.), the most common and widely used method is threaded connection, and its connection performance directly affects the vibration mode and safety performance of the vehicle. Since the physical quantities such as compression force and frictional moment cannot be directly measured when threaded connections are in operation, stress analysis and fatigue analysis using finite element simulation technology have become the only way to study the loosening principle of body-chassis syst...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 高大威郑松林郑腾飞李智垠龙荣利李向阳
Owner UNIV OF SHANGHAI FOR SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com