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NESC1143 EPIPE.

EPIPE, Static and Dynamic Piping System Analysis

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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1. NAME OR DESIGNATION OF PROGRAM:  EPIPE, static and dynamic piping
system analysis.
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2. COMPUTERS
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Program name Package id Status Status date
EPIPE NESC1143/01 Tested 07-JUN-1994

Machines used:

Package ID Orig. computer Test computer
NESC1143/01 CDC 7600 CRAY Y-MP
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3. DESCRIPTION OF PROGRAM OR FUNCTION

EPIPE is used to perform both static and dynamic analyses of large piping systems. The static analysis includes pressure, deadweight, and thermal loadings. Dynamic analysis is performed for earthquake motion and flow-induced vibration loads, or any combination of these.
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4. METHOD OF SOLUTION

EPIPE determines the response of a piping system under static load from the equilibrium conditions given in matrix form. The equilibrium equations are solved using the Gaussian elimination method. Decomposition of the stiffness matrix and load vector is performed first. Then, using backward substitution, the displacement components at the active nodes are determined. After the displacements are found, the member forces of each pipe element  are computed. The dynamic response is carried out using response spectrum, time history, or step-by-step direct integration methods.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

EPIPE is a modification of the general-purpose SAP4 program (NESC 641). The modification consists of deletion of the analysis options other than piping, addition of stress calculations for piping segments in accordance with the piping code ANSI B31.7, and inclusion of an independent support motion, response spectrum computation option.
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9. STATUS
Package ID Status date Status
NESC1143/01 07-JUN-1994 Tested at NEADB
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10. REFERENCES:
NESC1143/01, included references:
- M. Subudhi and P. Bezler:
  EPIPE - Piping Analysis Program , User's Manual (Version 1981)
  BNL-NUREG-30784 (December 1981).
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11. MACHINE REQUIREMENTS

EPIPE uses the CDC Level 2 method to allocate its working space.
NESC1143/01
NEA-DB implemented the program on a CRAY-YMP computer.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC1143/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  SCOPE.
NESC1143/01
The test run at the NEA-DB were done under UNICOS 7.0.4
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

Y.K. Wang, Structural Analysis
Division, Department of Nuclear Energy, Brookhaven National
Laboratory.
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16. MATERIAL AVAILABLE
NESC1143/01
File name File description Records
NESC1143_01.001 Information file 68
NESC1143_01.002 JCL and control information 11
NESC1143_01.003 epipe.f EPIPE FORTRAN source program 11208
NESC1143_01.004 epipe.inp sample problem input 57
NESC1143_01.005 epipe.out sample problem output 396
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17. CATEGORIES
  • I. Deformation and Stress Distributions, Structural Analysis and Engineering Design Studies

Keywords: dynamic loads, mechanical vibrations, pipes, static loads.