Abstract
Both finite element and experimental techniques were investigated for the determination of the surface mobility of an “infinite plate” excited over a square contact area with a uniform conphase force distribution using the effective point mobility concept. Various factors affecting the accuracy of the finite element calculations are discussed. Comparison among the numerical, experimental and theoretical results shows similar trend in the behaviour of the surface mobility. Generally, the surface mobility decreases with increase in width-based Helmholtz number and the first two dips in the surface mobility are separated by approximately π in the Helmholtz number.
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