A Forced Six Degrees of Freedom Motion Apparatus

The invention belongs to the technical field of hydrodynamics experiments of ship model experimental tanks, and particularly relates to a forced six-degree-of-freedom motion instrument. The forced six-degree-of-freedom motion instrument includes an experimental machine frame, a pitching-rolling connecting rod and a torque servo motor driving device; forced six-degree-of-freedom of a ship model simulates a passive seakeeping experimental device to do a seakeeping experiment of a six-degree-of-freedom ship model motion state, the seakeeping experiment correspondingly includes pitching, rolling,heaving, yawing, surging and swaying, and through the measurement modes, a six-dimensional hydrodynamic coefficient matrix is obtained; and hydrodynamic coefficients of the ship model, such as additional mass and drag coefficients during ship model motion, are analyzed and calculated to further predict the motion of a ship in waves. According to the forced six-degree-of-freedom motion instrument,the sinusoidal linear velocity is generated through an eccentric wheel, thus the contact strength and the motion stability of a mechanism are increased; and the six-degree-of-freedom motion instrumenthas the advantages of a compact and reasonable structure, convenient operation, high test efficiency, comprehensiveness, economical efficiency and the like, and the application prospects are wide.