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Title: Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems

Abstract

This taper describes an implicit three-dimensional finite-element formulation for the structural analysis of reactor piping system. The numerical algorithm considers hoop, flexural, axial, and torsion modes of the piping structures. It is unconditionally stable and can be used for calculation of piping response under static or long duration dynamic loads. The method uses a predictor-corrector, successive iterative scheme which satisfies the equilibrium equations. A set of stiffness equations representing the discretized equations of motion are derived to predict the displacement increments. The calculated displacement increments are then used to correct the element nodal forces. The algorithm is fairly general, and is capable of treating large displacements and elastic-plastic materials with thermal and strain-rate effects. 7 refs., 7 figs.

Authors:
Publication Date:
Research Org.:
Argonne National Lab., IL (USA)
OSTI Identifier:
5581131
Report Number(s):
CONF-850809-7
ON: DE85006842
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 8. international conference on structural mechanics in reactor technology, Brussels, Belgium, 19 Aug 1985; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; LMFBR TYPE REACTORS; PIPES; STEAM LINES; RESPONSE FUNCTIONS; COMPUTERIZED SIMULATION; CREEP; DYNAMIC LOADS; FINITE ELEMENT METHOD; HYDRODYNAMICS; MATHEMATICAL MODELS; PRESSURIZING; REACTOR CORE DISRUPTION; REACTOR SAFETY; STRESSES; TEMPERATURE EFFECTS; THREE-DIMENSIONAL CALCULATIONS; TRANSIENTS; ACCIDENTS; BREEDER REACTORS; EPITHERMAL REACTORS; FAST REACTORS; FBR TYPE REACTORS; FLUID MECHANICS; FUNCTIONS; LIQUID METAL COOLED REACTORS; MECHANICAL PROPERTIES; MECHANICS; NUMERICAL SOLUTION; REACTOR ACCIDENTS; REACTORS; SAFETY; SIMULATION; 210500* - Power Reactors, Breeding; 220900 - Nuclear Reactor Technology- Reactor Safety

Citation Formats

Wang, C Y. Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems. United States: N. p., 1985. Web.
Wang, C Y. Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems. United States.
Wang, C Y. 1985. "Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems". United States. https://www.osti.gov/servlets/purl/5581131.
@article{osti_5581131,
title = {Implicit finite element structural dynamic formulation for long-duration accidents in reactor piping systems},
author = {Wang, C Y},
abstractNote = {This taper describes an implicit three-dimensional finite-element formulation for the structural analysis of reactor piping system. The numerical algorithm considers hoop, flexural, axial, and torsion modes of the piping structures. It is unconditionally stable and can be used for calculation of piping response under static or long duration dynamic loads. The method uses a predictor-corrector, successive iterative scheme which satisfies the equilibrium equations. A set of stiffness equations representing the discretized equations of motion are derived to predict the displacement increments. The calculated displacement increments are then used to correct the element nodal forces. The algorithm is fairly general, and is capable of treating large displacements and elastic-plastic materials with thermal and strain-rate effects. 7 refs., 7 figs.},
doi = {},
url = {https://www.osti.gov/biblio/5581131}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}

Conference:
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