Vibrational power flow characteristics of circular plate structures with peripheral surface crack

In the view of structure-borne sound, the vibrational power flow of circular plates with peripheral surface crack is investigated. The peripheral surface crack is modelled as a joint of a local spring. The local stiffness of the rotational spring is deduced by using fracture mechanics and strain energy arguments. At high frequencies, the motion of bending wave and the input power flow are researched in the case of a harmonic force loaded at its center.