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Innovative Trim Wedge System for Enhanced Seakeeping Performance

Learn about a new trim wedge system to improve ship seakeeping in various conditions. This system adapts to wave and mooring configurations, reducing roll motion and enhancing comfort. Results show power savings and increased flexibility in operations.

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Innovative Trim Wedge System for Enhanced Seakeeping Performance

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  1. ATW • Active Trim Wedge • Loïc Morand • Head of Hydrodynamic department • STX France 04th of June 2015

  2. ATW • Problem : • Trim wedge works well but his efficiency is dependent of the following : • Ship speed • Loading conditions • Different trim wedge angles can improve the seakeeping performance in special conditions : • Mooring configuration: Specially when waves are coming from stern or beam waves. • Extreme wave condition in head waves • Approach : • The idea is to adapt the trim wedge angle to these conditions. (Existing STX patent : EP20090793932 20090703) 04th of June 2015

  3. ATW • Technical Solution • System consists of the following : • Hydraulic jacks • Control / command system 04th of June 2015

  4. ATW • Results • Following conclusion have been obtained based on model tests results on an over panamax cruise ship : • In calm water • The benefit is several % in power depending of the project. • Different angle applied for different wedge lead to additional improvement • Moreover it allows to cancel the degradation of a static trim to the aft which give more flexibility in terms of operation. 04th of June 2015

  5. ATW • Results • In waves : • Roll motion : • The system reduce roll motion in moderate sea states without fins stabilizers which cancel the speed lost due to the use of stabilizer. • Confort in term of vibration : • Better VDV values are obtained with adapted trim wedge angle. 04th of June 2015

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