Vibrational wave analysis of infinite damaged beams using structure-borne power flow

摘要

In the view of structure-borne sound, vibrational wave analysis of infinite beam structures with a transverse open damage by means of vibrational power flow is investigated. In this paper, the damage is modeled as a joint of a local spring with a constant value that is deduced from the relationship between the strain energy and stress intensity factor in fracture mechanics, then the input power flow and transmitted power flow of perfect and dmaged beams are computed. The results show that the vibrational power flow of damaged beam is highly relative to the degree and location of damage.