"In this thesis, wave propagations excited by surface-mounted instruments such as PZT and transducer rings attached on an infinite isotropic hollow cylinder are investigated. A mathematical model of the wave propagation system is studied both analytically and numerically. A detailed derivation of the characteristic equation for pipes is conducted, and the development of waves is simulated using the finite element method (FEM). Compared with the analytical results, the accuracy of the numerical modeling is verified, and Lamb wave propagation in pipes with defects is studied as well. By parametric study, the influence of the defect depth on the received signals is investigated."--From abstract.
Read
