Validation study of the distinct lattice spring model (DLSM) on P-wave propagation across multiple parallel joints

Jianbo Zhu, G. F. Zhao, X. B. Zhao, J. Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

34 Citations (Scopus)

Abstract

A validation study of the distinct lattice spring model (DLSM) for wave propagation problems is performed. DLSM is a microstructure-based numerical model, which is meshless and has advantages in modelling dynamic problems where stress wave propagation is important. To verify the applicability of DLSM to modelling wave propagation through a discontinuous medium, the virtual wave source (VWS) method is used to obtain analytical solutions for wave propagation across a jointed rock mass. Numerical modelling results of the commercial code UDEC are selected as the reference. The effects of particle size and lattice rotation angle on wave propagation are first studied. Then, the results of wave transmission across a single joint with a different joint stiffness and across multiple parallel joints with different joint spacings are derived with DLSM, UDEC and VWS. These results are in good agreement with each other. Therefore, the capability of DLSM to model P-wave propagation across jointed rock mass is verified, which provides confidence for the further application of DLSM to modelling more complex problems.
Original languageEnglish
Pages (from-to)298-304
Number of pages7
JournalComputers and Geotechnics
Volume38
Issue number2
DOIs
Publication statusPublished - 1 Mar 2011
Externally publishedYes

Keywords

  • Distinct lattice spring model
  • Rock joint
  • UDEC
  • Virtual wave source
  • Wave propagation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

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