Reliability-Based Comparative Life Expectancy Assessment of Patrol Boat Hull Structures

Abstract

The estimation of an absolute life expectancy is a complex process and the results are expected to have relatively large levels of uncertainty. In this study, a comparative study is undertaken between two different patrol boats. This is an approach which will result in higher confidence level because certain common factors to the boats can be eliminated by assuming them to be at constant normal levels. The study is limited to the critical forward bottom plating and takes into account the differences in material, plate dimensions, operational profile, structure and loading of the two vessels. Two failure modes, plastic plate deformation and fatigue, are considered and a novel approach to wastage is included. Many factors affect the structural life of a boat. They include structural type, operational profile, structural details, loads, inspection and maintenance, design methods, safety factors, corrosion and environmental factors.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA221363

Entities

People

  • Bilal M. Ayyub
  • Edward S. Purcell
  • Gregory J. White
  • Thomas F. Bell-wright

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Computational Science
  • Computer Programs
  • Distribution Functions
  • Dynamic Pressure
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Information Science
  • Materials
  • Mathematical Models
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Monte Carlo Method
  • Random Variables
  • Stochastic Processes
  • Surveys

Readers

  • Naval Architecture and Marine Engineering.
  • Regression Analysis.
  • Structural Health Monitoring of Composite Structures.