EXCITATION OF SYMMETRICAL ELASTIC-WAVES I N PLATES BY A LASER-BEAM

Excitation of symmetrical elastic waves by a laser beam is investigate d theoretically and experimentally. Excitation of plane and axisymmetr ic waves is studied. The relation between elastic displacements and la ser irradiation power is obtained for harmonic and pulse regime of exc itation. The efficiency of the Lemb waves excitation is found for diff erent modes. It is shown that efficiency of excitation may be controll ed by varying crossection of a laser beam. Experimental data are in go od agreement with theoretical calculation made for excitation of plate s by pulse laser irradiation.