WIT Press

Localising A Notch In A Rod From Changes In Node Positions

Price

Free (open access)

Paper DOI

10.2495/FR980641

Volume

19

Pages

10

Published

1998

Size

845 kb

Author(s)

G.M.L. Gladweir & A. Morassi

Abstract

This paper is an analytical/experimental investigation of the effect of damage on the nodes of free vibration modes of a thin rod in longitudinal vibration. The damage, a notch, is simulated by a simple spring. It is shown that nodes move towards the notch. The direction and amount by which they move may be used to estimate the position and severity of the damage Analytical results agree well with experimental tests. 1 Introduction In most studies of dynamic methods for damage localization, researchers have used changes in natural frequency as the diagnostic tool. Frequencies can be measured more easily than can mode shapes, and are usually less afffected by experimental errors. In damage detection problems, we are looking for two things: the location of the damage, and its magnit

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