EVIMAR 1st Virtual Institute

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Safety _at_ Speed WP2- Ship Motion Hazards Status
Paris, 2002.05.17 Ph. Corrignan,Sirehna
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WP2 architecture

• Task 2.1 - Confirmation of main causes
• Task 2.2 - Formulation of models
• ST 2.2.1 - Human factor
• ST 2.2.2 - Hull design
• ST 2.2.3 - Operational practice
• Task 2.3 - Implementation of models
• ST 2.3.1 - Human factor
• ST 2.3.2 - Hull design
• ST 2.3.3 - Operational practice

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WP2 status

• Task 2.1 - Confirmation of main causes
• ? D210 first issued on 2001.12.03.
• ? Final issue after revision on 2002.02.04

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WP2 status (contd)

• Task 2.2 - Formulation of models
• ? Desk study in progress
• List of criteria related to ship motion to be
  modelled, with input/output parameters and
  development methodology established.
• Assessment of numerical methods for HSC
  seakeeping performance prediction by UNEW and
  DTU, against SEAWORTH project model test results,
  performed.
• Pitch, heave, VBM, HBM RAOs for SSC3 calculated.
• List of parameters established.
• Two WP2 technical meetings (Genoa, Paris)

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WP2 status (contd)

• Task 2.2 - Formulation of models - Plan

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WP2 technical

• Task 2.2 - Benchmark of seakeeping codes
• ? SEAWAY UNEW
• ? ShipmoPC UNEW (2D freq. Domain strip
  theory)
• ? I-Ship DTU
• ? Calculation of RAOs pitch, heave, midship
  and fore VBM, midship and fore acceleration
• ? Two monohulls, regular head and bow
  quartering waves, irregular head waves, speeds
  22-40 kn
• ? Preliminary conclusions good agreement
  between predictions and linear components of
  experimental data (without whipping).

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WP2 technical

• Task 2.2 - SuperSeaCat 3 calculations (UNEW)
• ? SEAWAY, ShipmoPC, MARCHS (3D)
• ? Pitch, heave, VBM and HBM RAOs
• ? Speed 25 to 35 kn stern to head waves
• ? Large discrepancies between codes for stern
  to beam waves.
• ? Need to consider stern to beam waves in WP2
  (and for other WPs ?) to be examined

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WP2 technical

• Task 2.2 - Sea trials basic specifications
• ? SuperSeaCat 3 Liverpool-Belfast
• ? Several tests periods (2-3days) Sept-Oct.
  02
• ? Measurements
• Motions, accelerations at midship waves
  (SIREHNA).
• Accelerations close to bow (motions, slamming,
  whipping/springing) (VTT).
• Accelerations, vibrations (main engine,
  propulsion), noise, indoor climate (T, humidity)
  close to stern (NTUA).
• All acceleration measurements synchronised
• Wave buoys (SEA).