Vibro-acoustics Response of a Rectangular ThinPlate Under Different Force Location and DifferentThickness

Analytical dynamic response and sound power radiation of a rectangular simply supported thin plate under external excitation force and different force location and thickness are studied in this paper. The natural frequencies and vibration response of the plates are obtained by means of the Rayleigh-Ritz method. Sound radiation characteristics of the rectangular plate are de-rived using Ray-leigh integral formula. The non-dimensional frequency parameters of the rec-tangular plates with simply support boundary condition are presented in the paper, which may be useful for future researchers. Accuracy of natural frequencies is confirmed with pervious researches. Finally, the effect of point force location and thickness, on acoustic characteristic of simply supported recangular plate are studied in this paper. The relationship of sound power level and point force location also plate thickness is deducted. Meanwhile, in this paper , some interesting points are found when analysing acoustic radiation characteristics of simply sup-ported recagular plates.

کلیدواژه ها:

vibro-acoustics response ، rectangular thin plate ، sound power radiation.