Ship Structures and Design

Mechanical Properties in Marine Structural Design

• The following mechanical properties are considered:
  • Strength
  • Stiffness
  • Toughness
  • Ductility
  • Fatigue

Levels of Marine Structural Design

• There are three levels:
  • Global level (overall structural response)
  • Local level (component and detail design)
  • Material level (material properties and behaviour)

Basis of Marine Structural Design

• The basis is the load-carrying capacity and structural integrity of the marine structure under various loads and conditions

Selection of Marine Structural Material

• The purpose is to ensure the material can withstand the loads and stresses imposed on the structure, considering factors such as
  • Strength
  • Corrosion resistance
  • Durability
  • Cost
  • Fabrication feasibility

Scantlings in Marine Structural Design

• Scantlings refer to the dimensions and thickness of structural elements and plates
• They are critical in ensuring the structural integrity and load-carrying capacity of the marine structure

Design by Rules and Standards

• The purpose is to provide a standardized framework for design, ensuring consistency and reliability
• Rules and standards are developed based on industry best practices, research, and experience

Yield Strength in Marine Structural Design

• Yield strength is the maximum stress a material can withstand before permanent deformation occurs
• It is an essential consideration in marine structural design, as it affects the structure's load-carrying capacity and safety

Performance-Based Design

• Characteristics considered in performance-based design include
  • Deflection
  • Vibration
  • buckling
  • Collapse
  • Fatigue

Geometrical Properties in Marine Structural Design

• The purpose of determining geometrical properties is to accurately model and analyze the structural behavior and response under various loads and conditions