Assessment of Safety of Ship in Berth Services

Ship-to-ship (STS) cargo transfer operation by oil and LNG tankers in harbors and offshore has been increasing in recent years. Our advanced simulation technology enables us to numerically evaluate the safety of vessels moored side by side, taking into account ship motions caused by wind and waves.
The system calculates hydrodynamic forces considering the interactions between the two vessels, and output data for time domain analysis comprises ship motion, mooring line tension, and reaction/deflection forces of fenders installed on the jetty and positioned between the two vessels.

Using the following simulation methods, MOL Marine & Engineering studies emergency unberthing methods, and ways to safely anchor and moor in sheltered water, based on water level fluctuation and speed data gained from tsunami simulations. This research helps us provide our clients with appropriate criteria for tsunami evacuations and help them develop effective emergency response manuals.

• Numerical simulation of tsunami effects
• Ship handling simulation for emergency unberthing
• Shiphandling simulation for anchoring
• Shiphandling simulation for mooring in sheltered water

Investigation conditions

• Earthquake (fault break parameters)
• Harbor
  · Harbor design
  · Water depth(inside / outside harbor)
• Ships and mooring facilities
  · Ships, mooring arrangements, etc.
  · Mooring equipment

Investigation methodology

• Tsunami numerical simulation
  → Evaluation of earthquake and tsunami hitting harbor
• Shiphandling simulation for emergency unberthing
  → Evaluating ship handling method for emergency unberthing and safety
• Anchoring simulation
  → Evaluating slewing motion of the hull and safety of anchoring
• Shiphanding simulation for mooring in sheltered water
  → Evaluation of effects of earthquake and tsunami on moored ships