Concept design and risk analysis
Goal is to not only design and numerically evaluate new ideas for newbuilt or rebuilt ships but also to perform risk analysis. Target is to ensure that these new concepts are safe to use and that they provide the performance needed. Risk analyses can be made for both seakeeping and maneuvering.
Risk analysis for seakeeping
Wave induced motion control (6DOF)
- Roll damping with and without fin stabilizers, bilge keels, rudders, skegs and antiroll tanks
Non-linear motions
- Events driven by GM variation
- Sudden heel angle increasement
Wave impact loads
- Green water collapse: slamming, bow loads, safe boats etc.
- Aft slamming
Added resistance for determination of sea margin and speed loss
- Impact of the motion control devices
- Shallow and deep water resistances
- Effect of wave and wind on ship dynamic position
- Effect of added resistance on drift and steering
- Propeller loading
- Loss of thrust
- Ventilation by propeller tip suction
- Relative wave elevation
- Propeller characteristics
- Increase of hull resistance
Risk analysis for maneuvering
IMO standard maneuvers
- Zig-zag tests with different angles
- Rudder test with different angles
- Turning circle test
- Full astern stopping test
Additional maneuvers
- Spiral test
- Reverse spiral test
- Pull-out maneuver
- Very small zip-zag maneuver
- Harbor and low speed, crabbing
- Pole tests with thrusters
Ota yhteyttä
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