FIELD: transportation.
SUBSTANCE: invention relates to water transport and can be used for prediction of ship motion trajectories performing complex maneuvering. Method of determining damping hydrodynamic characteristics of a ship consists in forming its three-dimensional electronic model, wherein part of the hull of the ship located above the waterline is cut off. Computing grid in form of spherical segment is formed around 3D electronic model. Base of the segment contains the waterline plane of the three-dimensional electronic model, and the axis of symmetry of the segment coincides with the axis of rotation of the three-dimensional electronic model. Computing grid in form of spherical segment is made with possibility of rotation together with three-dimensional electronic model relative to external computer grid. In calculation area formed by internal and external computational grids, distribution of flow velocity and pressure fields is determined. At that, oscillations of three-dimensional electronic model by drift angle are set. As a result non-stationary hydrodynamic effects on three-dimensional electronic model are determined. Then, dampening hydrodynamic characteristics of the ship are determined.
EFFECT: higher safety of ship control when performing complex maneuvering due to prediction of its movement along a given trajectory using computer simulation based on determined damping hydrodynamic characteristics, as well as high accuracy of control of a ship.
1 cl, 2 dwg
