WIAS Preprint No. 1314, (2008)

Elastic half-plane under random boundary excitations



Authors

  • Shalimova, Irina
  • Sabelfeld, Karl

2010 Mathematics Subject Classification

  • 65C05 65C20 65Z05

Keywords

  • White noise, Karhunen-Loève expansion, Poisson integral formula, boundary random excitations, 2D Lamé equation

Abstract

We study in this paper a respond of an elastic half-plane to random boundary excitations. We treat both the white noise excitations and more generally, homogeneous random fluctuations of displacements prescribed on the boundary. Solutions to these problems are inhomogeneous random fields which are however homogeneous with respect to the longitudinal coordinate. This is used to represent the displacements as series expansions involving a complete set of deterministic functions with corresponding random coefficients. We construct the Karhunen-Loève (K-L) series expansion which is based on the eigen-decomposition of the correlation operator. The K-L expansion can be used to calculate the statistical characteristics of other functionals of interest, in particular, the strain and stress tensors and the elastic energy tensor.

Appeared in

  • J. Statist. Phys., (2008) pp. 1--29.

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