A test method for optimal spring stiffness coefficient of elastic hydrofoils of wave glider
A test method and technology of stiffness coefficient, which are applied in the field of ships and marine engineering, can solve the problems of inability to accurately locate, large changes in the moving speed of the wave glider, and the inability of the trailer equipment to provide the heave force and motion effect of the mother ship on the underwater glider. Achieve the effect of avoiding motion interference, high accuracy and easy positioning
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Embodiment 1
[0039] like figure 1 As shown, the test device required in this test method includes a vertical excitation trolley, an underwater tractor model 4, a traction line 5 and a water tank 6; the vertical excitation trolley includes a trailer carrier 1, a heave excitation control device 2 and a sheave 3; like figure 2 As shown, the underwater tractor model 4 used in this test method includes a body 41 , elastic hydrofoils 42 and springs 43 .
[0040] When conducting the test, first configure the test device used for the test:
[0041] 1. Fix the upper end of the traction wire 5 and wrap it on the sheave 3;
[0042] 2. Fix the lower end of the traction wire 5 at the physical center of gravity of the underwater tractor model 4;
[0043] 3. Install the vertical excitation trolley on the guide groove of the water tank 6;
[0044] 4. Place the underwater tractor model 4 in the water tank 6 and completely submerge it in the water.
[0045] In the above configuration process, the mate...
Embodiment 2
[0048]The spring 43 studied in this test method is installed between the body 41 and the elastic hydrofoil 42, and after the installation of the spring 43, the body 41 is kept horizontal in the water, and the elastic hydrofoil 42 is kept horizontal under the action of the spring 43. After the installation is completed, use the similarity law to calculate the amplitude of the underwater tractor model 4 in the test corresponding to the wave height of the real sea state, and obtain the corresponding rotation angle of the power shaft from the above-mentioned amplitude calculation method. The amplitude of the underwater tractor model 4 must be set to meet the test requirements, and the amplitude of the underwater tractor model 4 must be smaller than the depth of the underwater tractor model 4 immersed in the water, so as to ensure that the heave excitation control device 2 is on the underwater tractor model 4. The whole process of providing heave excitation, the underwater tractor m...
Embodiment 3
[0050] When the heave excitation control device 2 applies heave excitation to the underwater tractor model 4, the vertical excitation trolley will move forward, because the edge surface of the water tank 6 for the vertical excitation trolley to slide is not completely flat, and the length of one grid of the water tank 6 is only Therefore, the time required for the car to pass through the three grids is measured, and its average speed is calculated to characterize the elastic hydrofoil performance of the wave glider. At this time, the average time required for the vertical excitation car to pass through the 3-grid water tank is recorded, and the movement speed of the vertical excitation car under the specific stiffness coefficient of the spring 43 and the specific amplitude of the underwater tractor model 4 is calculated to represent the Movement performance of a wave glider. Using the control variable method, the springs 43 with different stiffness coefficients are replaced, o...
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