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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (4): 26-32.doi: 10.11872/j.issn.1005-2518.2017.04.026

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Study on Attenuation Law of Displacement Response of Bolt Subjected to Transient Excitation Under Typical Constraint Conditions

ZENG Sheng 1,ZHOU Jie 1,SUN Bing2   

  1. 1.Nuclear Resources Engineering College,University of South China,Hengyang    421001,Hunan,China;
    2.School of Civil Engineering,University of South China,Hengyang    421001,Hunan,China
  • Received:2017-03-24 Revised:2017-07-10 Online:2017-08-30 Published:2017-10-30

Abstract:

In order to study the response characteristics of the anchors subjected to transient excitation under typical constraints,it is assumed that the vibration of the anchor rod is within the elastic limit and the section is kept as the plane,materials are homogeneous and isotropic.So,based on the one-dimensional wave theory,the wave equation of the vibration of the anchor is established by the shear stiffness and friction damping coefficient,according to Darren Bell principle.Introducing Dirac function,the analytical solution of the displacement,velocity and acceleration field of the anchor was obtained by using eigenvalue method for solving wave equation.By analyzing the displacement and acceleration response curve of the anchors under exciting vibration,following conclusions were drawn.The displacement response of one end fixed and another end free anchor is faster than both end free anchor.In addition,influenced by lateral damping and shear stiffness,the vibration amplitude of the acceleration response of one end fixed and another end free anchor is lower than both end free anchor about 4 orders of magnitude. 

Key words: anchor, transient excitation, low strain, constrained condition, response extent, dynamic charac- teristics

CLC Number: 

  • TU459

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