Condensed hyperelements method of non-vertical consistent boundaries for wave propagation analysis in irregular media

S. Dorafshan, F. Behnamfar, A. Khamesipour, M. Motosaka

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    The study of wave propagation in finite/infinite media has many applications in geotechnical and structural earthquake engineering and has been a focus of research for the past few decades. This paper presents an analysis of 2D antiplane problems (Love waves) and 2D in-plane problems (Rayleigh waves) in the frequency domain in media consisting of a near-field irregular and a far-field regular part. The near field part may contain structures and its boundaries with the far-field can be of any shape. In this study, the irregular boundaries of the near-field are treated as consistent boundaries, extending the concept of Lysmer's vertical consistent boundaries. The presented technique is called the Condensed Hyperelements Method (CHM). In this method, the irregular boundary is limited to a vertical boundary at each end that is a consistent boundary at the far-field side. Between the two ends, the medium is discretized with hyperelements. Using static condensation, the stiffness matrix of the far-field is derived for the nodes on the irregular boundary. Examples of the application of the CHM illustrate its excellent accuracy and efficiency.

    Original languageEnglish
    Pages (from-to)547-559
    Number of pages13
    JournalEarthquake Engineering and Engineering Vibration
    Volume12
    Issue number4
    DOIs
    Publication statusPublished - 2013 Dec 23

    Keywords

    • condensed hyperelement method (CHM)
    • irregular media
    • non-vertical consistent boundary
    • seismic waves
    • thin layer method

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Geotechnical Engineering and Engineering Geology
    • Mechanical Engineering

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