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NESC0627 TOODY2

TOODY-2, Lagrangian Nonlinear Wave Propagation in 2-D X-Y or Cylindrical Geometry

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1. NAME OR DESIGNATION OF PROGRAM:  TOODY2
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2. COMPUTERS
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Program name Package id Status Status date
TOODY-2 NESC0627/01 Tested 19-SEP-1983

Machines used:

Package ID Orig. computer Test computer
NESC0627/01 CDC CYBER 174 CDC CYBER 174
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3. DESCRIPTION OF PROBLEM OR FUNCTION

TOODY2 is used to compute wave  propagation in two dimensions in rectangular or cylindrical coordinates.
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4. METHOD OF SOLUTION

TOODY2 is based on the conventional finite difference analogs to the Lagrangian equations of motion. The finite difference technique is an approximate method of solving the nonlinear partial differential equations describing two-dimensional  motion. The degree of approximation depends on the mesh sizes, mesh  shape, and artificial viscosity coefficients which are used. Four types of boundary conditions are considered. These are (1) a free surface, (2) a surface with an applied stress acting on it, (3) a symmetry plane, and (4) a rigid non-sliding boundary.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  Maximum per problem  of -, 19 different materials
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6. TYPICAL RUNNING TIME

TOODY2 can calculate 3.3*10**5 mesh cycles per hour.
NEA-DB executed the test case on CDC CYBER 174 in 15 CPU seconds.
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7. UNUSUAL FEATURES OF THE PROGRAM

TOODY2 features include -
(1) Intermediate tape storage is used. The values of properties  computed are written on these tapes after they have been  computed. After the computation has proceeded and these values  are again required, they are read from these tapes. This allows  values to be stored outside of the computer memory when they are     not being used in the calculations.
(2) A sliding interface option is included. This option yields a  more accurate description of the problem when the motion of two  adjacent meshes is very different. Further, this allows more  convenient zoning when more than one material is involved. Eight  sliding interfaces can be used per problem and the interface     friction can be specified as zero, infinite, or finite.
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8. RELATED AND AUXILIARY PROGRAMS

TOODY2 is ALO-008 transferred from  the ALO-COSMIC collection. It is an improved version of TOODY.
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9. STATUS
Package ID Status date Status
NESC0627/01 19-SEP-1983 Tested at NEADB
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10. REFERENCES:
NESC0627/01, included references:
- L.D. Bertholf and S.E. Benzley:
  TOODY-2, A Computer Program  for Two-dimensional Wave Propagation
  SC-RR-68-41 (November 1968).
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11. MACHINE REQUIREMENTS

To execute the test case on CDC CYBER 174, 176,000 octal words of main storage are required.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0627/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
SCOPE 6.2 (CDC 3600). NOS (CDC CYBER 174).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

                 L. D. Bertholf and S. E. Benzley
                 Sandia Laboratories
                 P. O. Box 5800
                 Albuquerque, New Mexico  87115
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16. MATERIAL AVAILABLE
NESC0627/01
File name File description Records
NESC0627_01.003 TOODY-2 INFORMATION FILE 64
NESC0627_01.004 TOODY-2 SOURCE CARD-IMAGES (FORTRAN-4) 4101
NESC0627_01.005 TOODY-2 JCL FOR TEST CASE EXECUTION 35
NESC0627_01.006 TOODY-2 INPUT DATA FOR TEST CASE 42
NESC0627_01.007 TOODY-2 OUTPUT OF TEST CASE 518
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: hydrodynamics, stresses, two-dimensional, wave propagation.