›› 2009, Vol. 30 ›› Issue (12): 3747-3752.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Propagation law of stress wave in nonlinear structural surface medium

WANG Guan-shi1, 2, LI Chang-hong1, CHEN Bao-jun3, LI Sh-ihai3   

  1. 1. University of Science and Technology Beijing, Beijing 100083, China; 2. Jiangxi University of Science and Technology, Ganzhou 341000, China; 3. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2008-10-09 Online:2009-12-10 Published:2010-01-18

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Abstract:

Property of structural surface is described by tangent stiffness and secant stiffness. The effect of initial rigidities of structural surface, frequency of stress wave and the ratio of normal and maximum allowed fracture closure of structural surface on transmission coefficient is studied. Block response of structural surface under nonlinear deformation is simulated by continuous- based discrete element method(CDEM). The results show that the stress wave propagation in rock mass is a process of both wave propagation and block response; the propagation of stress wave and response of stress wave are influenced by structural surface; stiffness variation of structural surface is effectively reflected by characteristic frequency. The computational expressions of characteristic frequency are given. The findings in this paper can be useful to the detection of rock mass structural surface.

Key words: stress wave, structural surface, nonlinear deformation, frequency analysis

CLC Number: 

  • TD 235.1
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