Ice gouge depth determination via an efficient stochastic dynamics technique

Nikolaos Gazis, Ioannis A. Kougioumtzoglou, Edoardo Patelli

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Abstract

A simplified model of the motion of a grounding iceberg for determining the gouge depth into the seabed is proposed. Specifically, taking into account uncertainties relating to the soil strength, a nonlinear stochastic differential equation governing the evolution of the gouge length/depth in time is derived. Further, a recently developed Wiener path integral (WPI) based approach for solving approximately the nonlinear stochastic differential equation is employed; thus, circumventing computationally demanding Monte Carlo based simulations and rendering the approach potentially useful for preliminary design applications. The accuracy/reliability of the approach is demonstrated via comparisons with pertinent Monte Carlo simulation (MCS) data.
Original languageEnglish
Article number011501
Number of pages8
JournalJournal of Offshore Mechanics and Arctic Engineering
Volume139
Issue number1
Early online date20 Sep 2016
DOIs
Publication statusPublished - 28 Feb 2017

Keywords

  • offshore pipelines
  • offshore safety
  • probabilistic models
  • offshore structures
  • structural safety
  • forces motions
  • pipelines
  • risk analysis
  • offshore reliability

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