Study of Numerical Methods in Seismic Problems

reportActive / Technical Report | Accession Number: AD0754212 | Open PDF

Abstract:

The authors investigate the application of two numerical methods finite element and finite difference approximations toward the ultimate solution of problems involving the propagation of Rayleigh waves generated by an explosion in the atmosphere over an island atoll. Because of mathematical difficulties in these methods, useful calculations of Rayleigh wave spectra at teleseismic distances were not obtained. It appears that the physical constraints of the atoll structure, e.g., abrupt changes in elastic properties in both lateral and vertical directions, require either the application of large and costly computer codes or an advance in the present state of the art in numerical simulation. Examples are offered of numerical solutions to problems which have known analytic solutions.

Author(s):
Mccowan, D. W. ; Newton, C. A. ; Page, E. A. ; Peterson, A. F. ; Flinn, E. A.
Author Organization(s):
TELEDYNE GEOTECH ALEXANDRIA VA ALEXANDRIA LABS
Supplementary Note:
DOI: 10.21236/AD0754212
Pagination:
0062

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AL-72-2, AFOSR-TR-73-0011
Contract/Grant Number(s):
F44620-69-C-0082, ARPA ORDER-1357
Monitor Series:
TR-73-0011, AFOSR
 Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.3.3_Spectrum Management; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_1_Force Support; JCA_6.1_Information Transport; JCA_6.3_Net Management; JCA_6.4.1_Secure Information Exchange; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_1.2_Force Preparation; JCA_5_Command and Control; JCA_6.4_Information Assurance
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Weapons Technologies
Descriptor(s):
*NUCLEAR EXPLOSIONS, *RAYLEIGH WAVES, *SEISMIC WAVES, AIRBURST, DETECTION, ISLANDS, NUMERICAL METHODS AND PROCEDURES
Field(s)/Group(s):
Seismology, Seismic Detection and Detectors
Keyword(s):
FINITE DIFFERENCE THEORY, FINITE ELEMENT ANALYSIS
Report Date:
1972 Sep 07