A Semi-Analytical Finite Element (SAFE) method for modeling stress wave propagation in waveguides of arbitrary cross-section is presented. The known SAFE method is extended to account for viscoelastic material damping by considering complex stiffness matrices in the constitutive equations. Dispersive solutions are extracted by solving a generalized eigenvalue problem. Phase velocity, energy velocity, attenuation, and cross-sectional mode shapes are obtained for several examples including a viscoelastic plate, a railroad track and a axial symmetric layered cylinder. The response to harmonic point excitation is also represented.
Bartoli, I., Marzani, A., Lanza di Scalea, F., Viola, E. (2006). Modeling guided wave propagation for structural monitoring of damped waveguides. MADRID : Alfredo Güemes.
Modeling guided wave propagation for structural monitoring of damped waveguides
MARZANI, ALESSANDRO;VIOLA, ERASMO
2006
Abstract
A Semi-Analytical Finite Element (SAFE) method for modeling stress wave propagation in waveguides of arbitrary cross-section is presented. The known SAFE method is extended to account for viscoelastic material damping by considering complex stiffness matrices in the constitutive equations. Dispersive solutions are extracted by solving a generalized eigenvalue problem. Phase velocity, energy velocity, attenuation, and cross-sectional mode shapes are obtained for several examples including a viscoelastic plate, a railroad track and a axial symmetric layered cylinder. The response to harmonic point excitation is also represented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
