재질분포가 직교이방 조화함수로 변하는 사각 평판의 굽힘 진동 해석

Flexural Vibration of a Rectangular Plate with Orthotropically and Harmonically Varying Material Properties

The paper describes a theoretical study on the flexural vibration of an elastic rectangular plate with periodically nonuniform material properties. The approximate solution of the natural frequency and mode shape has been obtained using the perturbation technique for sinusoidal modulation of the flexural rigidity and mass density. It has been shown that distributed modes exist in the plate which Is a two-dimensional model of the flat panel speaker.