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Resetting dynamic behaviour of pipework systems; Recalage du comportement dynamique des reseaux de tuyauteries

Abstract

Resetting models is applied to electricity generating plant pipework systems. A frequency approach to the problem is made in an original way thanks to the use of precise dynamic rigidity matrices. The method assumes two kinds of unknown: the usually processed mechanical characteristics (Young`s Modulus, density etc.) and new resetting parameters acting on the dynamic behaviour of unknown connections. As the latter have a very wide range of possible variation, they benefit from a change of variable which allows the assumptions formulated to be complied with. The minimized cost function is based on a error in load. The frequencies required for building it are automatically selected thanks to different tests on measurements. Minimization uses a sensitivity technique linked with a method of least standard squares. The method has been programmed in Fortran 90 within the CIRCUS code and tried out on various examples which were simulated and sound effects cases as well as an actual case. (author). 128 refs.
Authors:
Gaudin, M [1] 
  1. Electricite de France (EDF), Direction des Etudes et Recherches, 92 - Clamart (France)
Publication Date:
Dec 31, 1997
Product Type:
Technical Report
Report Number:
EDF-97-NB-00037
Reference Number:
SCA: 220200; PA: AIX-29:015334; EDB-98:049150; SN: 98001946240
Resource Relation:
Other Information: DN: 128 refs.; PBD: 1997
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; C CODES; COST; DENSITY; DYNAMIC LOADS; DYNAMICS; LEAST SQUARE FIT; MATRICES; MECHANICAL PROPERTIES; MINIMIZATION; PIPES; POWER GENERATION; SENSITIVITY; YOUNG MODULUS
OSTI ID:
587697
Research Organizations:
Electricite de France (EDF), 92 - Clamart (France). Direction des Etudes et Recherches.
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Journal ID: ISSN 1161-0611; Other: ON: DE98616875; TRN: FR9710016015334
Availability:
INIS; OSTI as DE98616875
Submitting Site:
FRN
Size:
177 p.
Announcement Date:

Citation Formats

Gaudin, M. Resetting dynamic behaviour of pipework systems; Recalage du comportement dynamique des reseaux de tuyauteries. France: N. p., 1997. Web.
Gaudin, M. Resetting dynamic behaviour of pipework systems; Recalage du comportement dynamique des reseaux de tuyauteries. France.
Gaudin, M. 1997. "Resetting dynamic behaviour of pipework systems; Recalage du comportement dynamique des reseaux de tuyauteries." France.
@misc{etde_587697,
title = {Resetting dynamic behaviour of pipework systems; Recalage du comportement dynamique des reseaux de tuyauteries}
author = {Gaudin, M}
abstractNote = {Resetting models is applied to electricity generating plant pipework systems. A frequency approach to the problem is made in an original way thanks to the use of precise dynamic rigidity matrices. The method assumes two kinds of unknown: the usually processed mechanical characteristics (Young`s Modulus, density etc.) and new resetting parameters acting on the dynamic behaviour of unknown connections. As the latter have a very wide range of possible variation, they benefit from a change of variable which allows the assumptions formulated to be complied with. The minimized cost function is based on a error in load. The frequencies required for building it are automatically selected thanks to different tests on measurements. Minimization uses a sensitivity technique linked with a method of least standard squares. The method has been programmed in Fortran 90 within the CIRCUS code and tried out on various examples which were simulated and sound effects cases as well as an actual case. (author). 128 refs.}
place = {France}
year = {1997}
month = {Dec}
}