Chapter 6: Ship Stability and Trim. From my Book Principles and practice of Marine Engineering. Er.Praveen Kr Tyagi Chief Engineer (Asso-RINA-ENGLAND).
Chapter 6: Ship Stability and Trim --- 6.1 Introduction Ship stability is a fundamental aspect of naval architecture, ensuring that a vessel remains upright and returns to an upright position after being tilted by external forces like waves or wind. This chapter covers the basic principles of stability, center of gravity, buoyancy, metacentric height, types of equilibrium, and trim. --- 6.2 Definitions and Key Concepts --- 6.3 Conditions for Stability Stable Equilibrium: M is above G Unstable Equilibrium: G is above M Neutral Equilibrium: M coincides with G Stability condition: GM = BM - BG > 0 (I = second moment of area, V = displaced volume) Diagram 6.1: Stable, Unstable, and Neutral Equilibrium Conditions --- 6.4 Types of Stability Righting Arm (GZ): GZ = GM \cdot \sin(\theta) --- 6.5 Factors Affecting Stability 6.2: Effect of Free Surface and Cargo Shifting on Stability --- 6.6 Stability Curves (GZ Curves) These cu...