Steady state elastodynamics solutions using boundary spectral line strips

Authors: Michael, Ofer; Avrashi, Jacob; Rosenhouse, Giora

Source: Engineering Computations: Int J for Computer-Aided Engineering, Volume 15, Number 2, 1998 , pp. 221-232(12)

Publisher: Emerald Group Publishing Limited

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Abstract:

The 2D frequency domain boundary integral equation is solved by the boundary spectral strip method. Using an expansion for frequency domain elastodynamics kernel we reduce its singularity and present analytical solutions for the required integrals in the singular case when the integration path is a straight line. The method is illustrated by two different problems, both over a range of excitation frequencies. The first problem is a rectangular bar under a longitudinal excitation, which has an analytical solution. The other problem is a trapezoidal dam loaded by a transverse excitation at its base. The solution for the second problem is compared with a finite elements model. The results obtained from these tests show a good agreement between the results of the boundary strip method and analytical or finite elements results.

Keywords: Boundary Element Method (Bem); Boundary Integral Equation (Bie); Elastodynamics; Spectral Strip

Document Type: Research Article

DOI: http://dx.doi.org/10.1108/02644409810202611

Publication date: February 1, 1998

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