The Role of Nonlinear Hydrodynamics in Ship Leaning & Capsizing

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Discussion Overview

The discussion revolves around the role of nonlinear hydrodynamics in the context of ship stability, particularly focusing on the conditions under which these forces may be considered negligible during the process of a ship leaning and potentially capsizing. The scope includes theoretical considerations of hydrodynamic forces and their implications for ship stability at large angles of heel.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants question whether nonlinear hydrodynamic forces can be ignored when a ship is leaning slowly and capsizing.
  • It is noted that ship stability at large angles of heel is typically treated as a quasi-static process, except when assessing the speed of capsizing.
  • There is a suggestion that if the vessel is heeling slowly, nonlinear hydrodynamic forces may be neglected.
  • A participant seeks clarification on whether these forces can be disregarded when a capsized ship is attempting to right itself.

Areas of Agreement / Disagreement

Participants express differing views on the significance of nonlinear hydrodynamic forces in the context of ship stability and capsizing, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

The discussion highlights the conditional nature of the claims regarding the neglect of nonlinear hydrodynamic forces, which may depend on specific scenarios of ship behavior and stability analysis.

wssrwsmt
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Can the nonlinear hydrodynamic be ignored in the process of a ship leaning slowly， and the ship capsized ultimately.

Thanks！
 
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wssrwsmt said:
Can the nonlinear hydrodynamic be ignored in the process of a ship leaning slowly， and the ship capsized ultimately.

Thanks！
Nonlinear hydrodynamic what?

Ship stability at large angles of heel is usually treated as a quasi-static process, unless one is trying to determine how quickly capsizing takes place.
 
SteamKing said:
Nonlinear hydrodynamic what?

Ship stability at large angles of heel is usually treated as a quasi-static process, unless one is trying to determine how quickly capsizing takes place.
The nonlinear hydrodynamic what?
  • The nonlinear hydrodynamic forces
 
wssrwsmt said:
The nonlinear hydrodynamic what?
  • The nonlinear hydrodynamic forces

Ship stability at large angles of heel is usually treated as a quasi-static process, unless one is trying to determine how quickly capsizing takes place.
If, as you say, the vessel is heeling slowly, then these forces can be neglected.
 
SteamKing said:
Ship stability at large angles of heel is usually treated as a quasi-static process, unless one is trying to determine how quickly capsizing takes place.
If, as you say, the vessel is heeling slowly, then these forces can be neglected.
Thank you for answering my question.
So， The nonlinear hydrodynamic forces can be neglected when a capsized ship is righting ？
 

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