@article {Tue_Nov_18_10:06:17_WET_2003,
	title = {Hybrid-{T}refftz displacement element for spectral analysis of bounded and unbounded media},
	journal = {International Journal of Solids and Structures},
	volume = {40},
	year = {2003},
	note = {<p>n/a</p>
},
	pages = {671-699},
	abstract = {<p>The hybrid-{T}refftz displacement element is applied to the elastodynamic analysis of bounded and unbounded media in the frequency domain. The displacements are approximated in the domain of the element using local solutions of the wave equation, the Neumann conditions are enforced directly and the surface forces are approximated on the Dirichlet and inter-element boundaries of the finite element mesh. Two alternative elements are developed to model unbounded media, namely a finite element with absorbing boundaries and an unbounded element that satisfies explicitly the Sommerfeld condition. The finite element equations are derived from the fundamental relations of elastodynamics written in the frequency domain. The numerical implementation of these equations is discussed and numerical tests are presented to assess the performance of the formulation.</p>
},
	keywords = {hybrid-{T}refftz displacement elements, spectral analysis, unbounded media},
	author = {Freitas, J. A. T. and Cisma{\c s}iu, C.}
}
