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Statements

Subject Item
n2:RIV%2F00216305%3A26110%2F07%3APU71662%21RIV08-MSM-26110___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
The uncertainty of stochastic computations for which input random quantities are introduced in the subjective manner is presented in this paper. To obtain a correct stochastic computation, it is necessary to have exclusively objective statistical information based on experiments including the correlation matrix at the disposal. If this information is not available, the vague (fuzzy) uncertainty is to be quantified by applying the so-called fuzzy analysis. In the present paper, these problems are demonstrated on the example of an analysis of fuzzy uncertainty of probability assessment of the reliability of a steel member under compression. The output is a fuzzy set of failure probability. The single crisp control output of failure probability was obtained with use of the defuzzification centre of gravity method. The value obtained was by 200 percent higher than that obtained by the classical stochastic computation. In conclusion, the applicability possibilities of the complex fuzzy-random uncertainty a The uncertainty of stochastic computations for which input random quantities are introduced in the subjective manner is presented in this paper. To obtain a correct stochastic computation, it is necessary to have exclusively objective statistical information based on experiments including the correlation matrix at the disposal. If this information is not available, the vague (fuzzy) uncertainty is to be quantified by applying the so-called fuzzy analysis. In the present paper, these problems are demonstrated on the example of an analysis of fuzzy uncertainty of probability assessment of the reliability of a steel member under compression. The output is a fuzzy set of failure probability. The single crisp control output of failure probability was obtained with use of the defuzzification centre of gravity method. The value obtained was by 200 percent higher than that obtained by the classical stochastic computation. In conclusion, the applicability possibilities of the complex fuzzy-random uncertainty a V článku je demonstrována neurčitost stochastických výpočtů, u kterých se vstupní náhodné veličiny zavádí subjektivně. Pro korektní stochastický výpočet je nutno mít k dispozici výlučně objektivní statistické informace z experimentů včetně korelační matice. Pokud tyto informace nejsou dostupné, je nutno kvantifikovat vágní (fuzzy) neurčitost s užitím tzv. fuzzy-random analýza. Problematika je v článku demonstrována na příkladu analýzy fuzzy neurčitosti pravděpodobnostního posudku spolehlivosti ocelového prutu pod tlakem. Výstupem je fuzzy množina pravděpodobnosti poruchy. Ostrý kontrolovatelný výstup byl obdržen defuzzifikací metodou centra plochy. Obdržená hodnota byla o 200 procent vyšší než hodnota obdržená klasickým stochastickým výpočtem. V závěru jsou diskutovány možnosti uplatnění komplexní fuzzy-random analýzy neurčitosti při pravděpodobnostním posudku spolehlivosti konstrukcí metodou SBRA.
dcterms:title
Fuzzy-Random Analysis of Steel Structures Fuzzy-Random analýza ocelové konstrukce Fuzzy-Random Analysis of Steel Structures
skos:prefLabel
Fuzzy-Random Analysis of Steel Structures Fuzzy-Random analýza ocelové konstrukce Fuzzy-Random Analysis of Steel Structures
skos:notation
RIV/00216305:26110/07:PU71662!RIV08-MSM-26110___
n3:strany
199-210
n3:aktivita
n15:P
n3:aktivity
P(1M0579), P(GA103/05/2059), P(KJB201720602)
n3:cisloPeriodika
1
n3:dodaniDat
n10:2008
n3:domaciTvurceVysledku
n8:2676400
n3:druhVysledku
n16:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
422866
n3:idVysledku
RIV/00216305:26110/07:PU71662
n3:jazykVysledku
n17:eng
n3:klicovaSlova
steel, failure, probability, correlation, fuzzy, simulation
n3:klicoveSlovo
n9:correlation n9:failure n9:steel n9:probability n9:fuzzy n9:simulation
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[B5D0A9FBE138]
n3:nazevZdroje
Engineering Mechanics
n3:obor
n4:JM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
1
n3:projekt
n7:GA103%2F05%2F2059 n7:KJB201720602 n7:1M0579
n3:rokUplatneniVysledku
n10:2007
n3:svazekPeriodika
14
n3:tvurceVysledku
Kala, Zdeněk
s:issn
1802-1484
s:numberOfPages
12
n12:organizacniJednotka
26110