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Pre-tightening force estimation method for threaded connection piece and computer readable medium storing pre-tightening force estimation program for threaded connection piece

A threaded connection, pre-tightening force technology, applied in the direction of torque/torsion force measurement, design optimization/simulation, special data processing applications, etc.

Active Publication Date: 2020-09-01
HENAN EPRI GAOKE GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to provide a method for estimating the pre-tightening force of a threaded connection to solve the technical problem of how to obtain the physical quantity of the pre-tightening force of a threaded connection in the absence of data related to the initial configuration of the threaded connection

Method used

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  • Pre-tightening force estimation method for threaded connection piece and computer readable medium storing pre-tightening force estimation program for threaded connection piece
  • Pre-tightening force estimation method for threaded connection piece and computer readable medium storing pre-tightening force estimation program for threaded connection piece
  • Pre-tightening force estimation method for threaded connection piece and computer readable medium storing pre-tightening force estimation program for threaded connection piece

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Effect test

Embodiment 1

[0118] Embodiment 1: A computer-readable medium storing a program for estimating the pretightening force of a threaded connection, the threaded connection includes a bolt and a nut, the bolt includes a head, a cylindrical portion, and a threaded portion, and the threaded connection The preload estimation routine can be implemented to run the following steps:

[0119] The data input step, the physical quantities received in the data input step include: the elastic modulus E of the isotropic metal material of the threaded connection in service, the equivalent force-bearing length L of the threaded connection, the length of the shared section between the nut and the threaded part Effective load-bearing cross-sectional area A SN , The effective load-bearing cross-sectional area A of the threaded part SP , The effective load-bearing cross-sectional area A of the cylindrical part SG , The effective load-bearing cross-sectional area A of the head SC , the axial length of the nut h...

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PUM

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Abstract

The invention discloses a pre-tightening force estimation method for a threaded connection piece and a computer readable medium storing a pre-tightening force estimation program for the threaded connection piece and belongs to the field of threaded connecting piece maintenance. The method comprises the steps of using longitudinal waves for measuring the longitudinal wave time difference delta tLof an in-service threaded connecting piece, using transverse waves for measuring the transverse wave time difference delta tT of the in-service threaded connecting piece, wherein the frequency of thetransverse waves is lower than that of the longitudinal waves; obtaining the pre-tightening force FP of the threaded connecting piece according to the shape function Gamma of the threaded connecting piece; the shape function of the threaded connecting piece is introduced, so that the estimation precision of the pre-tightening force of the threaded connecting piece is improved.

Description

technical field [0001] The present invention relates to the technical field of threaded connection maintenance, in particular to a method for estimating the pretightening force of a threaded connection, and a computer-readable medium storing a program for estimating the pretightening force of a threaded connection. Background technique [0002] At present, iron towers are generally constructed using a space truss structure. When analyzing the static / dynamic characteristics of the iron tower, it is necessary to pay special attention to the state of its attached threaded connections. Taking the transmission tower as an example, during operation, under the action of unsteady dynamic loads such as wind or earthquakes and static loads of self-weight, the transmission tower line system will experience vibrations of different amplitudes, resulting in secondary lap joints of screw fixed connections. The relative sliding of the interface causes the pre-tightening force of the thread...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/17G01L5/24G06F119/14
CPCG06F30/20G06F30/17G01L5/24G06F2119/14Y02T90/00
Inventor 张武能兰光宇汪毅张元吴克华张留斌王晓晨李金峰方堃张帅金俊魏利锋
Owner HENAN EPRI GAOKE GRP