A 2.5D boundary element formulation for modeling damped waves in arbitrary cross-section waveguides and cavities
Dispersive properties of viscoelastic waveguides and cavities are computed using a regularized 2.5D BEM. Linear viscoelasticity is introduced at the constitutive level by means of frequency dependent complex moduli. A contour integral algorithm is used to solve the nonlinear eigenvalue problem. The Sommerfeld radiation condition is used to select the permissible Riemann sheets. Attenuation of surface waves in cavities approaches the attenuation of Rayleigh waves.
cavities dispersion viscoelasticity regularization contour integral algorithm nonlinear eigenvalue problem stress guided waves