last modified: 01-APR-1977 | catalog | categories | new | search |

NEA-0465 FRAMES.

FRAMES, Vibration Analysis of Spaceframes with Lumped Mass Distribution

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1. NAME OR DESIGNATION OF PROGRAM:  FRAMES.
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2. COMPUTERS
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Program name Package id Status Status date
FRAMES NEA-0465/01 Tested 01-APR-1977

Machines used:

Package ID Orig. computer Test computer
NEA-0465/01 ICL 4/70 ICL 4/70
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3. NATURE OF PHYSICAL PROBLEM SOLVED

The program calculates forced responses, natural frequencies and normal modes of a skeletal space  frame with its mass distribution lumped on to selected nodal points.
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4. METHOD OF SOLUTION

The framework is solved by applying displacement methods and eigenvalue routines to stiffness and mass matrices.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The program is limited to

100 nodes
78 inertial degrees of freedom
100 different member types
200 specified nodal displacements.
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6. TYPICAL RUNNING TIME

For a structure with 100 nodes and 78 inertial degrees of freedom, the calculation of 14 natural frequencies and normal modes requires 48 minutes of machine time.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS

SPANDE, a general purpose program for the analysis of spaceframes and pipeworks.
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9. STATUS
Package ID Status date Status
NEA-0465/01 01-APR-1977 Tested at NEADB
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10. REFERENCES

- D.A. Jobson and J.R. Litherland:
  'Vibration Analysis by Computer.  A User's Guide to Programs for the Natural and Forced Oscillations of Skeletal Structures'
  TRG Report 1919(R). 1969.
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11. MACHINE REQUIREMENTS

(1) Core:  176 kbytes
(2) Data volumes: 6 disc files on 1 disc.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0465/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  RIOS III of ICL 4-70.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHOR

        D.A. Jobson and J.R. Litherland
        Risley
        United Kingdom
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16. MATERIAL AVAILABLE
NEA-0465/01
File name File description Records
NEA0465_01.001 FRAMES SOURCE - FORTRAN IV EBCDIC 5859
NEA0465_01.002 FORTRAN SUBROUTINE LIBRARY 1781
NEA0465_01.003 USERCODE SUBROUTINE LIBRARY 614
NEA0465_01.004 SAMPLE PROBLEM 11
NEA0465_01.005 OVERLAY AND RUN CARDS 84
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: mechanical vibrations, stress analysis.