last modified: 01-OCT-1979 | catalog | categories | new | search |

NEA-0565 MAILLE.

MAILLE, Triangular Finite Elements Generator for Planar Structure

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1. NAME OR DESIGNATION OF PROGRAM:  MAILLE.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
MAILLE NEA-0565/01 Tested 01-OCT-1979

Machines used:

Package ID Orig. computer Test computer
NEA-0565/01 CDC 7600 CDC 7600
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Generates automatically triangular finite elements for  planar structures.
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4. METHOD OF SOLUTION

The finite elements can be both simple triangles with 3 nodes and 3 vertices or isoparametric triangles defining 6 nodes. The structure is entered into the program as blocks of rectangles on the sides of which the nodes are defined. The sides may be straight lines or curves. The program generates at the interior of each block automatically the meshes. The nodes are then  renumbered in order to generate a minimal band width. A CALCOMP plotter can be used to plot the finite elements of the structure with the renumbered nodes. Card output on which the coordinates of the nodes and the definition of the triangles are punched is provided for further processing in thermoelasticity problems.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Fixed dimensions are  used which permit the user to treat cases with up to 167 sides, 63 blocks. The maximum number of meshes on each side excluding the medium is 20. The maximum total number of nodes on the sides, medium  excluded is 350.
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6. TYPICAL RUNNING TIME

6 seconds CPU for test problem:  347 nodes, 7 blocks and 41 seconds of I/O on CDC7600.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS:  SIGMA-RZ, TEMP
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9. STATUS
Package ID Status date Status
NEA-0565/01 01-OCT-1979 Tested at NEADB
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10. REFERENCES

- MM. Deries, M. Pria:
  programme MAILLE, description generale
  FRANLAB (1974) (in French).
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11. MACHINE REQUIREMENTS:  113000b octal words SCM., 320000b octal words LCM.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0565/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  SCOPE 2.1.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

An IBM version in single precision was generated which gave a band width of 33 whereas the CDC version gave a band width of 17 for the  same problem. A double precision version would require 1 megabyte core  storage on IBM (LCM is simulated in fast memory).
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15. NAME AND ESTABLISHMENT OF AUTHOR

    MM. Deries, M. Pria
    FRANLAB Informatique
    4 Av. de Bois-Preau
    92 Rueil Malmaison
    France
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16. MATERIAL AVAILABLE
NEA-0565/01
File name File description Records
NEA0565_01.001 SOURCE (F4,EBCDIC) 1632
NEA0565_01.002 SUBROUTINE INTEGR,MCARRE (F4) 305
NEA0565_01.003 DUMMY PLOT ROUTINE 9
NEA0565_01.004 SAMPLE PROBLEM INPUT 78
NEA0565_01.005 SAMPLE PROBLEM PUNCHED OUTPUT 191
NEA0565_01.006 SAMPLE PROBLEM PRINTED OUTPUT 364
NEA0565_01.007 JCL AND INFORMATION 23
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: bandwidth minimization, finite element method, mesh generation.