NUMERICAL GROUND MOTION STUDIES. VOLUME I. STUDY OF NUMERICAL SOLUTION ERRORS IN ONE- AND TWO-DIMENSIONAL FINITE DIFFERENCE CALCULATIONS OF GROUND MOTION

Results are presented of a study to determine numerical solution errors in two-dimensional hydrodynamic calculations of surface bursts. The changes in solution errors due to variations in mesh point distribution are studied in one and two dimensions; the results of the investigation are applied to i...

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Bibliographic Details
Main Authors: Trulio, John G, Germroth, John J, Carr, William E, Niles, William J
Format: Report
Language:English
Subjects:
CONTINUUM MECHANICS
DIFFERENCE EQUATIONS
ERRORS
EXPLOSION EFFECTS
HYDRODYNAMICS
KINETIC ENERGY
MECHANICAL WAVES
MOTION
NUCLEAR EXPLOSIONS
NUMERICAL ANALYSIS
Numerical Mathematics
ONE DIMENSIONAL FLOW
PROPAGATION
SHOCK WAVES
Soil Mechanics
SOILS
SURFACE BURST
TWO DIMENSIONAL FLOW
WAVE PROPAGATION
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Summary:Results are presented of a study to determine numerical solution errors in two-dimensional hydrodynamic calculations of surface bursts. The changes in solution errors due to variations in mesh point distribution are studied in one and two dimensions; the results of the investigation are applied to improving the solution to a two-dimensional problem. A method is described which allows a grid to expand automatically to contain a moving shock. Methods are presented for achieving several kinds of mesh point distributions based on a geometric progression in the distance between mesh points. (Author)