Search results for: S. Rahman

Items from 1 to 4 out of 4 results

article

Deterministic sampling for propagating epistemic and aleatory uncertainty in dynamic event tree analysis

S. Rahman, D.R. Karanki, A. Epiney, D. Wicaksono, more

Reliability Engineering & System Safety > 2018 > 175 > C > 62-78

Dynamic Event Tree (DET) analysis allows for integrated deterministic and probabilistic safety assessment by coupling thermal-hydraulic system models with safety system and operator response models. It is a realistic but computationally challenging approach for risk quantification in a nuclear power plant. DET can also provide a two-loop nested framework to quantify uncertainty arising from aleatory...

article

Epistemic and aleatory uncertainties in integrated deterministic and probabilistic safety assessment: Tradeoff between accuracy and accident simulations

D.R. Karanki, S. Rahman, V.N. Dang, O. Zerkak

Reliability Engineering & System Safety > 2017 > 162 > C > 91-102

The coupling of plant simulation models and stochastic models representing failure events in Dynamic Event Trees (DET) is a framework used to model the dynamic interactions among physical processes, equipment failures, and operator responses. The integration of physical and stochastic models may additionally enhance the treatment of uncertainties. Probabilistic Safety Assessments as currently implemented...

article

A multi-point univariate decomposition method for structural reliability analysis

D. Wei, S. Rahman

International Journal of Pressure Vessels and Piping > 2010 > 87 > 5 > 220-229

A new multi-point univariate decomposition method is presented for structural reliability analysis involving multiple most probable points (MPPs). The method involves a novel function decomposition at all MPPs that facilitates local univariate approximations of a performance function in the rotated Gaussian space, Lagrange interpolation for univariate component functions and return mapping to the...

article

A stochastic micromechanical model for elastic properties of functionally graded materials

S. Rahman, A. Chakraborty

Mechanics of Materials > 2007 > 39 > 6 > 548-563

A stochastic micromechanical model is presented for predicting probabilistic characteristics of elastic mechanical properties of an isotropic functionally graded material (FGM) subject to statistical uncertainties in material properties of constituents and their respective volume fractions. The model involves non-homogeneous, non-Gaussian random field representation of phase volume fractions and random...

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Keywords

DYNAMIC EVENT TREE ANALYSIS (2)
DYNAMIC PSA (2)
EPISTEMIC AND ALEATORY UNCERTAINTIES (2)
BETA POINT (1)
DECOMPOSITION METHOD (1)
DESIGN POINT (1)
DIMENSIONAL DECOMPOSITION METHOD (1)
EFFECTIVE PROPERTIES (1)
FORM/SORM (1)
MULTIPLE MOST PROBABLE POINTS (1)
PROBABILITY OF FAILURE (1)
RANDOM FIELD (1)
RELIABILITY (1)
SECOND-MOMENT CHARACTERISTICS (1)
STATION BLACKOUT (SBO) (1)
STOCHASTIC MICROMECHANICS (1)
UNIVARIATE METHOD (1)
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Search results for: S. Rahman

Deterministic sampling for propagating epistemic and aleatory uncertainty in dynamic event tree analysis

Epistemic and aleatory uncertainties in integrated deterministic and probabilistic safety assessment: Tradeoff between accuracy and accident simulations

A multi-point univariate decomposition method for structural reliability analysis

A stochastic micromechanical model for elastic properties of functionally graded materials

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