Passing through the elastic wave barrier by a load moving uniformly along a smoothly inhomogeneous elastic system

Journal article (1999)

Authors

A.R.M. Wolfert Materials and Environment - CEG
A. Metrikine Russian Academy of Sciences
H.A. Dieterman External organisation
Research Group
Materials and Environment (CEG) (TU Delft)
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Published Date

01-01-1999

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

The passing through the elastic wave barrier velocity is investigated for the case of a uniform load motion along a string on an elastic foundation. The string and foundation parameters vary 'smoothly' in such a manner that a transition from sub- into supercritical load motion occurs as the load passes a region of inhomogeneity. The transient solution for the string vibrations is derived and studied as a function of a characteristic length of the region of inhomogeneity. It turns out that during the passing the string displacements remain limited. It is shown that the smaller the characteristic length the smaller is the maximum amplitude of the string vibrations.

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