Vibrational Power Flow Input and Transmission in a Finite Cylindrical Shell

The structural wave power flows in an elastic finite cylindrical shell are studied when a simply harmonic point force is applied on it. Motion equations of the shell are derived by equation and the variational principle. By using the basic concept of power flow, the characteristics for input vibrational power flows of the structure and transmission power flows in the axial direction carried by different internal forces of the shell are investigated. The studies show that there are some differences between input power flows and transmission power flows around the ring frequency in regular rulers varying with frequencies, it is effective to reduce the transmission power flows in case of the structural damping increasing, and the motion wave in a finite cylindrical shell at high frequencies is mainly flexuous type wave. These can provide some guidelines for vibration and noise control.