METHOD OF DETERMINING UNDERWATER OBJECT POSITIONING HYDRODYNAMIC CHARACTERISTICS Russian patent published in 2020 - IPC B63H25/00 

FIELD: machine building.

SUBSTANCE: invention relates to production of underwater vehicles and can be used for prediction of trajectories of underwater vehicles performing complex manoeuvring. To determine position hydrodynamic characteristics of underwater object include determination of underwater object rotation centre, formation of three-dimensional electronic model of underwater object and around this three-dimensional electronic model internal grid is formed. Internal computing grid is made with possibility of rotation together with three-dimensional electronic model of underwater object relative to external computation grid. In the calculated area occupied by the internal and external computational grids, the distribution of flow velocity and pressure fields is determined, the velocity of the liquid at the input boundary relative to the flow of the design area is set equal to the linear speed of the underwater object. At that inner computational grid around three-dimensional electronic model of underwater object is shaped to spherical shape with centre of sphere coinciding with underwater object rotation point, angular movements of underwater object are successively set by angles of attack, drift and roll. As a result, stationary hydrodynamic effects on underwater object are determined at different values of angles of attack, drift and roll, they are analysed and then position hydrodynamic characteristics of underwater object are determined.

EFFECT: higher safety and accuracy of underwater object control.

1 cl, 3 dwg