A new type of water surface drag test device platform based on two degrees of freedom

Abstract

The invention discloses a novel water surface towing test device platform based on two degrees of freedom. The platform comprises a directional unloading device system, a vertical keel beam structure,a two-degree-of-freedom force measurement system, an eight-claw rigidity reinforcing system, a trailer axle and a test model. According to the novel water surface towing test device platform based onthe two degrees of freedom, the unloading precision is improved by use of a vertical unloading device in the directional unloading system, and the error can be reduced by about 30%, thereby improvingthe accuracy of hydrodynamic and pneumatic tests such as a lifting resistance and a heaving height. The vertical keel beam structure has the functions of height controllable rotational yawing, precise angle positioning, and controllable placement model, thereby improving the test work efficiency. The two-degree-of-freedom force measurement system can perform up-and-down heaving movement and pitching movement; the pitching movement can be used for accurately positioning an angle and rigidly locking; and a test is conducted on a pitch angle of an accurate positioning model. The eight-claw rigidity reinforcing system improves the strength and rigidity characteristics of the test model, has the adaptability and universality of different model tests and can meet the requirements of different test working conditions.

Description

technical field [0001] The invention belongs to the technical field of hydrodynamic experiment simulation test, and in particular relates to a novel water surface drag test device platform based on two degrees of freedom. Background technique [0002] With the rapid development of modern technology and the state's support for various scientific research institutions, major equipment such as military ships, submarines, and military aircraft, as well as civilian ships, passenger aircraft, and civilian equipment have all developed rapidly. Hydrodynamic experiments play an important role in the process of equipment development, verification, and evidence collection. The further development of the technical field of the hydrodynamic experiment simulation system determines the development and application process of major national equipment. At present, the hydrodynamic laboratory with the longest and highest speed in Asia is the high-speed hydrodynamic laboratory of the China Spe...

AI Technical Summary

Problems solved by technology

In view of the current experimental conditions, the disadvantages are: (1) The unloading weight of the unloading test platform of the conventional towing test platform is placed in a wooden box and suspended on the rope. Under the condition of high speed, the maximum swing range can reach about 45 degrees, which seriously affects the accuracy of test unloading data, and high-speed swing motion also has high safety hazards; (2) the yaw and pitch tests of conventional towed test platforms The tooling fixture is single, the yaw mainly adopts the hole position positioning plate, and the pitch mainly adopts pad lift to ensure the angle, which has no universal adaptability, high cost, and the test rigidity and angle adjustment accuracy cannot be well guaranteed; (3) At present, the conventional towing test platform model towing test is only connected to the deep rod and the model. During the high-speed towing process, the rigidity is poor, which affects the accuracy of the test results.

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