Point-force excitation of an elastic plate with n embedded cavity
Journal article, 1985

The propagation of elastic waves in a thick plate containing an embedded cavity is considered. The full elastodynamic equations are solved and both time-harmonic and pulse propagation are treated. The time-harmonic problem is solved using the null field approach, a method whose main characteristics are surface integral representations and expansions in spherical and planar vector wave functions. To obtain the pulse response, a Fourier integral in frequency is employed. Numerical examples are given showing the fields in both the time and frequency domains at a few selectd locations on the plate surfaces when the plate is excited by a point force. Only low and intermediate frequencies are included and the pulse width is thus somewhat larger than the dimensions of the spheroidal cavity.


Anders E Boström


Anders Karlsson

Journal of Applied Mechanics, Transactions ASME

0021-8936 (ISSN)

Vol. 52 4 937-942

Subject Categories

Mechanical Engineering



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