The Role of Nonlinear Hydrodynamics in Ship Leaning & Capsizing

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SUMMARY

The discussion centers on the role of nonlinear hydrodynamics in ship stability, particularly during slow leaning and capsizing scenarios. It is established that nonlinear hydrodynamic forces can be neglected when a vessel is heeling slowly, as ship stability at large angles of heel is typically treated as a quasi-static process. However, these forces become significant when assessing the speed of capsizing. The consensus is that for slow heeling, the nonlinear effects do not play a critical role in stability analysis.

PREREQUISITES
  • Understanding of ship stability principles
  • Knowledge of hydrodynamic forces
  • Familiarity with quasi-static analysis in naval architecture
  • Basic concepts of capsizing dynamics
NEXT STEPS
  • Research nonlinear hydrodynamic modeling techniques
  • Study the effects of large angles of heel on ship stability
  • Explore methods for analyzing capsizing speed
  • Learn about quasi-static versus dynamic stability assessments
USEFUL FOR

Naval architects, marine engineers, and maritime safety professionals interested in ship stability analysis and capsizing prevention strategies.

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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