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

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5581131

Wang, C Y

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.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5581131
• Report Number(s): CONF-850809-7; ON: DE85006842
• Country of Publication: United States
• Language: English

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COMPUTERIZED SIMULATION
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FAST REACTORS
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PIPES
PRESSURIZING
REACTOR ACCIDENTS
REACTOR CORE DISRUPTION
REACTOR SAFETY
REACTORS
RESPONSE FUNCTIONS
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SIMULATION
STEAM LINES
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TEMPERATURE EFFECTS
THREE-DIMENSIONAL CALCULATIONS
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