Research on vibration properties of finite rib-stiffened L-shaped plate using wave method

The vibration and suppression of the finite L-shaped plate with square steel is studied by using the wave method.The finite rib-stiffened L-shaped plate is modeled as the coupling system between the flexural and in-plane motion of the plate,and the flexural,the torsional and the axial motions for the square steel.The vibration response at any position of the coupling structure can be obtained by using wave method.Numerical results show that in contrast with finite element method(FEM),not only the low frequency vibration responses but also the medium-high frequency vibration responses of the finite plate with square steel can be effectively calculated by wave method.The suppression effect can be increased with the torsional stiffness of the square steel if the steel is located at the junction of the L-shaped plate.And optimal suppression effect can be obtained if the steel is located at two third the length of the source plate or near the junction on the received plate.