A multi-degree-of-freedom resistance meter

Abstract

The invention belongs to the field of ship model test, and discloses a multi-degree of freedom resistograph. The resistograph is used for measuring ship model resistance, a yawing force and a ship model posture in a towing basin, comprises a sliding rail, a force measurement unit, a posture measurement unit and a hinge joint unit, the force measurement unit and the posture measurement unit both are arranged on the sliding rail and respectively change own measurement position through moving on the sliding rail, the hinge joint unit is used for being connected with a to-be-measured ship model; the hinge joint unit is used for connecting the sliding rail and the to-be-measured ship model, enabling the sliding rail to move with the to-be-measured ship model and transmitting multi-degree of freedom movement of the to-be-measured ship model to a navigation rod; the force measurement unit is connected with the navigation rod, and is used for measuring forces in X and Y directions on a horizontal upper edge of the to-be-measured ship model, namely, ship model resistance and the yawing force to the to-be-measured ship model; and the posture measurement unit is used for measuring displacement of the to-be-measured ship model along a z-axis direction. By simplification of measurement problems of the ship model resistance, the yawing force and the ship model posture of the ship model in the towing basin, measurement efficiency is improved.

Description

technical field [0001] The invention belongs to the field of ship model experiments, and more specifically relates to a multi-degree-of-freedom resistance instrument. Background technique [0002] Using the towing pool to carry out the ship model resistance experiment is a conventional method for the rapidity research of ships. In the towing pool, the resistance of the ship model at different speeds can be measured, and the relationship curve between the ship model’s resistance and speed can be obtained. According to a series of such The curve can analyze and compare the pros and cons of ship types. Because the roll, pitch and heave of the ship have an impact on the ship's resistance, in the traditional resistance experiment, the ship model can only heave and surge, and in the resistance experiment, it is often necessary to monitor the heave and trim attitude of the ship model for Qualitative or quantitative analysis of the impact of navigation attitude changes on drag. ...

AI Technical Summary

Problems solved by technology

Because the roll, pitch and heave of the ship have an impact on the ship's resistance, in the traditional resistance experiment, the ship model can only heave and surge, and in the resistance experiment, it is often necessary to monitor the heave and trim attitude of the ship model for Qualitative or quantitative analysis of the impact of navigation attitude changes on drag

[0003] The traditional mechanical resistance meter connects the ship model with the resistance meter through a steel wire, fixes the ship model through the navigation rod, and the resistance of the ship model is transmitted to the resistance meter through the steel wire. In the traditional experimental method, the navigation rod limits the The rotation around the X-axis and Y-axis cannot measure the resistance value of the ship model under multiple degrees of freedom, and the resistance meter in the traditional resistance test cannot measure the lateral force and head turning moment

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