Elastic and Viscoelastic Wave Scattering and Diffraction.
Abstract
The main objective of this research was to study the problem of two- and three-dimensional wave scattering and diffraction in elastodynamics and viscoelastodynamics. Presently available analytical techniques for solving wave propagation problems are useful only for simple cases. In practice, the presence of inhomogeneities and irregular boundary conditions defies analytical solutions. One of the best numerical techniques suitable for solving wave propagation in a complex geological medium, such as the problem of the ground response to seismic disturbances in alluvial valleys, is the method of combining the finite element method (FEM) in space and the finite differences method (FDM) in time. The advantages of using the finite element method in space are: (1) allowing for almost any type of static, dynamic, and thermal loading to be applied; (2) relatively easy to apply boundary conditions; (3) its flexibility in modeling irregular geology and topography; and (4) its distribution of errors, which are averaged over the elements throughout the domain in question. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1981
- Accession Number
- ADA095919
Entities
People
- Charles E. Shepherd
- John T. Kuo
- Kun-hua Chen
- Yu-chiung Teng