NEA-0217 DYNAPS.

1. NAME OR DESIGNATION OF PROGRAM:  DYNAPS.

3. NATURE OF PHYSICAL PROBLEM SOLVED

For the vibration analysis of complicated piping systems, DYNAPS aims to get eigenvalues and mode  of the system. The piping system may have additional masses, supporting springs, supports, hinges and branches and is treated as the combination of simple beams with the assumptions

1) Neglect the effect of an axial force to the flexural rigidity.
2) Neglect the effect of the shearing force and rotating inertia.
3) Neglect the unbalance of the forces (including the gravity    force) caused by the geometric deformation of the system.
4) Neglect all sorts of internal dampings.
5) Neglect the distributed mass for torsional vibration.
6) Assume no coupling between bending, torsional and longitudinal    vibrations, that is the cross-section should be annular.

4. METHOD OF SOLUTION

The transfer matrix of a whole piping system is  calculated by multiplying the transfer matrices of each straight section from one end to the other. Using boundary conditions at both ends, eigenvalues of the piping system are calculated using Holzer iterative method.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

   Number of partial boundaries less than or equal to 10.
   Branch of branch is permitted up to 10 times.
   The characteristics of individual components should be given by the CN cards less than 50.

7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS

- H. Shibata, S. Fujii, M. Iguchi, H. Sato:
  Theoretical Foundations for the Design of Earthquake Resistant
  Mechanical Structures
  Presented to the IAEA Panel Discussion Meeting on Aseismic Design
  and Testing of Nuclear Facilities (June 1967)

11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS

13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  IBJOB.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

15. NAME AND ESTABLISHMENT OF AUTHOR

         H. Shibata and H. Sato
         Institute of Industrial Science
         University of Tokyo
         22-1, Roppongi 7
         Minato, Tokyo
         Japan

         S. Fujii and M. Iguchi
         Mechanical Engineering for Production
         Faculty of Engineering
         University of Tokyo
         3-1, Hongo 7
         Bunkyo, Tokyo
         Japan

File name	File description	Records
NEA0217_01.001	SOURCE & DATA 7094	1665
NEA0217_01.002	OUTPUT	1125