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Virtual Mass of the Ship Formula:
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Virtual Mass of the Ship/ Vessel is measured as the summation of mass of the vessel and mass of the vessel due to inertial effects. It represents the effective mass that accounts for both the actual mass of the vessel and the additional mass effect caused by water entrainment.
The calculator uses the Virtual Mass equation:
Where:
Explanation: The equation calculates the total effective mass by summing the actual mass of the vessel and the additional mass contribution due to inertial effects of water entrained with the vessel.
Details: Accurate virtual mass calculation is crucial for ship dynamics analysis, maneuverability studies, and predicting vessel behavior in various sea conditions. It helps in understanding the effective inertia that must be overcome during acceleration and deceleration.
Tips: Enter the mass of the vessel and the mass due to inertial effects in Newtons. Both values must be non-negative numbers.
Q1: What is mass due to inertial effects?
A: Mass due to inertial effects refers to the additional effective mass caused by water that moves with the vessel, creating an inertial resistance to acceleration and deceleration.
Q2: How is virtual mass different from actual mass?
A: Virtual mass includes both the actual physical mass of the vessel and the hydrodynamic mass effect of water entrained with the vessel's motion.
Q3: When is virtual mass calculation important?
A: Virtual mass is particularly important in ship maneuvering simulations, collision analysis, and when studying vessel behavior in waves and currents.
Q4: Does virtual mass change with speed?
A: Yes, the inertial mass component can vary with the vessel's speed and the surrounding water conditions.
Q5: How is mass due to inertial effects determined?
A: It is typically determined through hydrodynamic calculations, model testing, or computational fluid dynamics simulations based on the vessel's shape and operating conditions.