文档介绍：Stoch Environ Res Risk Assess (2008) 22:379–390
DOI -007-0125-2
ORIGINAL PAPER
Fatigue reliability analysis of deep water rigid marine
risers associated with Morison-type wave loading
Muddassir Nazir Æ Faisal Khan Æ Paul Amyotte
Published online: 12 April 2007
Ó Springer-Verlag 2007
Abstract This work presents a simple and efficient worked example is included to show the practical riser
framework for the fatigue reliability assessment of a ver- design problem based on reliability analysis.
tical top-tensioned rigid riser. The fatigue damage response
is considered as a narrow-band Gaussian stationary random Keywords Reliability analysis of riser Á Fatigue analysis Á
process with a zero mean for the short-term behavior of a Failure analysis of riser Á Wave loading
riser. Non-linearity in a response associated with Morison-
type wave loading is accounted for by using a factor, which
is the ratio of expected damage according to a non-linear 1 Introduction
probability distribution to the expected damage according
to a linear method of analysis. Long-term non-stationary Reliability of a structure is the probability that it performs
response is obtained by summing up a large number of its intended function over a given period of time. Structural
short-term stationary responses. Uncertainties associated reliability is concerned with the probability of occurrence
with both the strength and stress parts of the limit state of limit state violation for engineered structures. Limit state
function are quantified by a lognormal distribution. A includes safety of the structure against collapse, limitations
closed form reliability analysis is carried out, which is on damage, or other safety criteria. The probability of limit
based on the limit state function formulated in terms of state violation is identical to the probability of failure.
Miner’s cumulative damage rule. The results thus obtained Because fatigue is the mon degradation
pared with