Hydrodynamic performance measuring mechanism in stability testing device for ship model in waves

Abstract

The invention discloses a hydrodynamic performance measuring mechanism in a stability testing device for a ship model in waves. The hydrodynamic performance measuring mechanism comprises a base supported by a trailer measuring bridge in a sliding mode, a supporting frame penetrates through the base and is fixedly connected with the base, a pulley at the upper end of the supporting frame is provided with a steel wire rope in a winding mode, one end of the steel wire rope is connected with a balance weight, and the other end of the steel wire rope is connected with a heaving rod. The heaving rod penetrates through the base and can slide up and down, the heavy rod is fixedly connected with a middle bracing wire extending end in a bracing wire type sensor, the bottom end of the heavy rod is sequentially provided with a three-component force sensor and a supporting seat, the two side walls of the supporting seat are provided with pitching shaft, and the pitching shaft and a rolling shaft form a cross-shaped shaft. The rolling shaft is arranged on fixed seats on the two sides of the supporting seat in an erected mode, and the pitching shaft and the rolling shaft are connected with rotational potentiometers. The other end of the rolling shaft is sequentially connected with a rolling torque sensor and a rolling locking device. According to the hydrodynamic performance measuring mechanism, the longitudinal force, the transverse force, the yawing torque, the pitching displacement and the heaving displacement of the ship model can be measured, and the yawning torque or the rolling displacement can be measured through locking or unlocking of rolling movement.

Description

technical field [0001] The invention relates to the technical field of hydrodynamic performance testing, in particular to a hydrodynamic performance measuring mechanism in a ship model test used for the study of the stability of a ship in waves, in particular to longitudinal force, lateral force, yaw moment, and pitch in a ship model wave. Measuring mechanism for displacement, heave displacement, rolling moment or rolling displacement. Background technique [0002] The stability of a ship refers to the ability of the ship to tilt away from its buoyant equilibrium position due to external forces, and return to the original equilibrium position when the external force disappears. Balance and ship stability are one of the most important performances of ships and the basic guarantee for safe navigation of ships. Model test is the main method of ship intact stability research. The existing ship model stability test in waves belongs to two-dimensional measurement, that is, it ca...

AI Technical Summary

Problems solved by technology

The existing ship model stability test in waves belongs to two-dimensional measurement, that is, it can only measure longitudinal force, pitch displacement and heave displacement, and is only suitable for rapid seaworthiness test in head-on waves. However, in wave In the measurement of the stability moment arm, in addition to the simulation of ship model sailing and waves in the seakeeping model test, it is more important to simulate the motion attitude of the ship model and accurately measure the moment. , it is also required that the ship model can move freely in the vertical and pitch directions, and at the same time, the variable heel hydrodynamic test can be carried out, so as to be able to measure the lateral force, lateral force, yaw moment and The measurement of the rolling moment can also be used to measure the pitch displacement, heave displacement and even roll displacement of the side corridor. At present, there is no such measuring device for the wave stability test of the ship model.

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