Stability Criteria Analysis for Landing Craft Utility

Abstract

Currently used Landing Craft Utility (LCU) stability criteria may not be optimal for the typical coastal transits of those vessels. Therefore, this study examines the intact transverse static and dynamic stability of the LCU in order to recommend more appropriate criteria for short-range transits. The analysis mainly uses the Program of Ship Salvage Engineering (POSSE) software and the standard Ship Motion Program (SMP) to model a stochastic sea state, simulate the LCUs loading conditions, and predict the crafts dynamic responses in certain sea state conditions. The LCUs static transverse stability is derived by the POSSE software in terms of righting arm diagrams for different loading conditions, while the SMP software determines the dynamic transverse stability. The SMP analysis is based on seakeeping theory, using sea spectra model techniques to determine the LCUs roll angle dynamic responses. Based on these simulation results, the study evaluates the currently used stability criteria and arrives at new dynamic stability recommendations and improved operational limits. These may be further refined by using hull appendage implementations in follow-on studies.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2017
Accession Number
AD1053444

Entities

People

  • Kyriakos Roussopoulos

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Amphibious Operations
  • Ballast Tanks
  • Base Lines
  • Birds
  • Center Of Gravity
  • Dynamic Response
  • Engineering
  • Engineers
  • Equations
  • Fluid Mechanics
  • Frequency
  • Intact Stability
  • Landing Craft
  • Metacentric Height
  • Naval Architecture
  • Relative Motion
  • Ship Motion
  • Ship Stability
  • Ships
  • Simulations
  • Statistical Analysis
  • Wind Velocity

Readers

  • Computational Modeling and Simulation
  • Marine Hydrodynamics