Accession Number:
AD0767010
Title:
3-D Seismic Code for ILLIAC-IV
Descriptive Note:
Interim rept.
Corporate Author:
SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
Personal Author(s):
Report Date:
1973-02-09
Pagination or Media Count:
114.0
Abstract:
Finite element FE and finite difference FD spatial differencing schemes for linearly elastic materials are compared on a common basis. Conditions are established under which the two methods are identical. Features commonly associated with FD methods are combined with a FE spatial treatment to obtain an explicit time stepping algorithm suitable for processing 3-D linearly elastic wave calculations on the ILLIAC IV system. Test calculations are presented to compare FE and FD codes at S3. Comparisons are made for two problems A spherically symmetric explosion with an exponentially decaying step pressure and Lambs problem - an impulse loading applied to the free surface of a homogeneous half space. Test calculations are presented for exploring certain features of the 3-D time stepping algorithm.
Descriptors:
Subject Categories:
- Seismology
- Computer Programming and Software