Mooring line fatigue in an offshore guyed tower

H. B. Kanegaonkar, Achintya Haldar

Research output: Contribution to journalArticle

Abstract

A probabilistic method is presented for the fatigue analysis of the mooring lines of a guyed tower. The wave loading is idealized as the first component of a two-dimensional Markov process. Using Ito's rule of stochastic differentials, differential equations for moments up to the fourth order are obtained, and these are solved using numerical techniques for both Gaussian and non-Gaussian methods. The displacement response is modelled as a mixture distribution. The probability distribution of guyline tension is then estimated. The probability density for peak guyline tensions is estimated by mapping a Gaussian process into the non-Gaussian process of guyline tensions using the double inversion technique and estimating level crossings. The tension fatigue is estimated using Palmgren-Miner's rule. It is shown that the fatigue damage estimated using non-Gaussian closure is greater than that estimated using Gaussian closure.

Original languageEnglish (US)
Pages (from-to)199-205
Number of pages7
JournalInternational Journal of Fatigue
Volume10
Issue number3
DOIs
StatePublished - 1988
Externally publishedYes

Fingerprint

Mooring
Fatigue
Towers
Fatigue of materials
Miners
Line
Fatigue damage
Markov processes
Probability distributions
Closure
Differential equations
Level Crossing
Mixture Distribution
Fatigue Damage
Probabilistic Methods
Numerical Techniques
Probability Density
Gaussian Process
Markov Process
Fourth Order

Keywords

  • fatigue
  • guyed tower
  • mooring
  • nonlinear random vibration
  • offshore structures

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Mooring line fatigue in an offshore guyed tower. / Kanegaonkar, H. B.; Haldar, Achintya.

In: International Journal of Fatigue, Vol. 10, No. 3, 1988, p. 199-205.

Research output: Contribution to journalArticle

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