Active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device and method

Abstract

The present invention discloses an active large-amplitude long tunnel double-ship combined ship hydrodynamic experimental device and method, the device includes a pushed ship model and a booster ship model, a rectangular transparent water pool, a water pool bracket, a height difference generating system, a ship model mooring system and a measuring system, the measuring system includes a flow rate meter, a wave height meter, a six-component force measuring balance, a high-speed camera and a water surface height scale, the flow rate meter is used to measure the flow rate of water in the transparent water pool, the wave height meter is used to measure the water level fluctuation in the transparent water pool, the six-component force measuring balance is arranged on the pushed ship model and the booster ship model, the high-speed camera is used to photograph the pushed ship model and the booster ship model, and the water surface height scale is used to measure the water level height of the transparent water pool; the present invention can systematically study the ship resistance, ship posture and motion response during the process of the ship entering and exiting the ship compartment.

Description

Technical Field

[0001] The present invention relates to the technical field of ship hydrodynamic experiments, and in particular to an active large-amplitude long tunnel double-ship combined ship hydrodynamic experiment device and method. Background Art

[0002] Ships entering and exiting the ship compartment face extremely complex environmental loads. The upstream navigation water level fluctuates greatly, and the downstream water level has a high rate of change. This leads to a number of problems, such as long entry and exit times, collisions between ships and ship lift equipment, and changes in the pilot channel water level affecting the efficiency and safety of the ship lift. The ship motion prediction for ships entering the compartment under high upstream water level fluctuations faces an extremely complex external environment, which affects the upstream docking of the compartment, resulting in insufficient water depth in the compartment, endangering the navigation safety of the Three Gorges Ship Lift and ships. The restricted domain for ships entering and exiting the Three Gorges Ship Lift involves the nonlinear coupling of multiple physical fields (inter-ship effects, shallow water effects, bank effects, high-amplitude water level fluctuation effects, and cecal channel effects). It is a highly complex ship hydrodynamic problem, and the theoretical analysis and numerical solution are extremely complex and face severe challenges. Under the restricted domain effect, the viscosity of the water flow has a significant impact. The single simplified model of the empirical formula is limited to specific ship types and difficult to accurately predict. The regression formula also cannot reveal the mechanism of shallow water and bank effects. Therefore, an experimental device suitable for studying the hydrodynamic response of a dual-ship combination ship in an active large-amplitude long tunnel is needed to systematically study the ship resistance, ship attitude and motion response during the process of the ship entering and exiting the compartment. Summary of the Invention

[0003] The purpose of the present invention is to provide an active large-amplitude long tunnel double-ship combined ship hydrodynamic experimental device and method, which can systematically study the ship resistance, ship posture and motion response when the ship enters and exits the cabin.

[0004] To achieve the above objectives, according to one aspect of the present invention, there is provided an active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device, comprising a pushed ship model and a booster ship model, and further comprising:

[0005] A rectangular transparent pool;

[0006] A pool bracket, connected to the transparent pool;

[0007] The high drop generation system is arranged on the pool bracket and includes a high drop water tank and a water discharge mechanism. The water discharge mechanism can discharge water in the high drop water tank into the transparent pool, so that the water in the transparent pool generates water flow fluctuations;

[0008] The ship model mooring system includes a mooring frame and a cable. The mooring frame is arranged on the inner side of the transparent pool. The cable is used to connect the mooring frame and the pushed ship model and the booster ship model.

[0009] The measuring system includes a flow meter, a wave height meter, a six-component force balance, a high-speed camera and a water surface height scale. The flow meter is used to measure the flow rate of water in the transparent water pool, the wave height meter is used to measure the water level fluctuation in the transparent water pool, the six-component force balance is set on the pushed ship model and the booster ship model, the high-speed camera is used to photograph the pushed ship model and the booster ship model, and the water surface height scale is used to measure the water level height of the transparent water pool.

[0010] Optionally, the transparent water pool is made of fiberglass and is open at the top. The measuring system also includes a water surface length scale. Both the water surface length scale and the water surface height scale are made of scale stickers and are pasted on the outer wall of the transparent water pool. The water surface length scale covers the entire length of the transparent water pool, and the water surface height scale covers the entire height of the transparent water pool.

[0011] Optionally, a side opening is provided in the high drop water tank, and the water discharge mechanism includes a support plate, a steel wire rope, a guide pulley, a water tank gate, a motor and a winding shaft, and the water tank gate is provided at the side opening of the high drop water tank; the support plate is provided on the water pool bracket and is located above the transparent water pool, the motor and the winding shaft are provided on the support plate, the motor is connected to the winding shaft, and the motor can drive the winding shaft to rotate; there are two steel wire ropes, and both are wound around the winding shaft, there are two groups of guide pulleys, and both are provided on the water pool bracket, the two steel wire ropes pass through the two groups of guide pulleys and are connected to the two ends of the water tank gate, and the two steel wire ropes can lift the water tank gate vertically upward under the action of the motor.

[0012] Optionally, each set of guide pulleys includes two guide pulleys, one of which is located directly above the winding shaft, and the other is located directly above the water tank gate.

[0013] Optionally, the pool bracket includes a rectangular main frame, a pulley mounting frame, a guide rail frame and a measuring mounting frame, the transparent water pool is arranged on the rectangular main frame, the length direction of the rectangular main frame is the same as the length direction of the transparent water pool, the guide rail frame is arranged at the upper end of the rectangular main frame, the guide rail frame can move along its length direction on the rectangular main frame, the pulley mounting frame is arranged at the upper end of the guide rail frame, and the guide pulley is mounted on the pulley mounting frame; the guide rail frame includes a vertical frame section, a vertical slide groove is provided on the vertical frame section, a slide is slidably connected to the vertical slide groove, and the slide can be moved in the vertical slide groove Sliding up and down, the vertical frame section of the guide rail frame is sequentially provided with multiple bolts for fixing the slide along the height direction, and the high drop water tank is arranged at the lower end of the slide; the measuring mounting frame is provided with multiple along the length direction of the rectangular main frame, and the measuring mounting frame includes a cross bar and a mounting rod, and sliding sleeves are provided at both ends of the cross bar. The cross bar is connected to the rectangular main frame through the sliding sleeve, and the sliding sleeve can slide along the rectangular main frame. The sliding sleeve is provided with bolts for fixing the sliding sleeve to the rectangular main frame, and the mounting rod is connected to the cross bar. The flow meter and the wave height meter are installed on the mounting rod of the measuring mounting frame.

[0014] Optionally, a baffle seat is installed on the guide rail frame, a baffle is installed in the baffle seat, the baffle is located directly above the water tank gate, and the height position of the baffle is adjustable.

[0015] Optionally, at least five wave height meters are arranged along the length direction of the transparent water pool, the first wave height meter is arranged at the front end of the water tank gate, the second and third wave height meters are arranged at the bow and stern ends of the pushed ship model and the booster ship model respectively, the fourth wave height meter is arranged at the stern end of the transparent water pool, and the fifth wave height meter is arranged between the water tank gate and the pushed ship model and the booster ship model.

[0016] Optionally, the length direction of the mooring rack is the same as the length direction of the transparent pool, and there are two mooring racks, which are respectively located on both sides of the width direction of the transparent pool; there are cables on both sides of the pushed ship model and the booster ship model, one end of the cable is connected to the pushed ship model and the booster ship model, and the other end is connected to the mooring rack.

[0017] Optionally, the mooring rack includes a horizontal mooring rod and two vertical supporting columns, the horizontal mooring rod is provided with a horizontal slide groove along its length direction, the horizontal slide groove is provided with a mooring slider, the mooring slider is provided with a mooring point, the horizontal mooring rod is provided with a long horizontal through hole leading to the horizontal slide groove along its length direction, the mooring slider is provided with a threaded hole, and a first fixing bolt is installed in the threaded hole, and the rod of the first fixing bolt passes through the horizontal through hole; The vertical support column is connected to the inner wall of the transparent water pool. A vertical slide groove is provided on the vertical support column along its height direction. A connecting slider is provided in the vertical slide groove. A long vertical through hole leading to the vertical slide groove is provided on the vertical support column along its length direction. A threaded hole is provided on the side wall of the connecting slider, and a second fixing bolt is installed in the threaded hole. The rod of the second fixing bolt passes through the vertical through hole. The two ends of the horizontal mooring rod are respectively fixedly connected to a connecting slider.

[0018] According to a second aspect of the present invention, a method for testing the hydrodynamics of a dual-vessel combination ship in a long tunnel with a large amplitude is provided. The method is implemented using the above-described apparatus for testing the hydrodynamics of a dual-vessel combination ship in a long tunnel with a large amplitude. The method specifically comprises the following steps:

[0019] S100: Clean the transparent water pool, and then add clean water to the transparent water pool to the required height according to the experimental requirements; adjust the height of the high drop difference water tank so that the lower end of the high drop difference water tank is in contact with the water surface in the transparent water pool, and inject clean water into the high drop difference water tank;

[0020] S200: placing the pushed boat model and the booster boat model stably in the water of a transparent pool and fixing them by a boat model mooring system;

[0021] S300: Install a flow meter, a wave height meter, a six-component force balance and a high-speed camera. The six-component force balance is installed on the pushed ship model and the booster ship model. The flow meter is installed on the pool bracket and is located between the high-drop water tank and the pushed ship model and the booster ship model. The high-speed camera is set outside the transparent pool and fixed separately on the peripheral bracket. The installation angle of the high-speed camera is adjusted so that the high-speed camera is aimed at the pushed ship model and the booster ship model. There are five wave height meters, all installed on the pool bracket. The installation positions of the five wave height meters are as follows: the first wave height meter is set at the front end of the high-drop water tank, the second and third wave height meters are set at the bow and stern ends of the pushed ship model and the booster ship model respectively, the fourth wave height meter is set at the stern end of the transparent pool, and the fifth wave height meter is set between the high-drop water tank and the pushed ship model and the booster ship model.

[0022] S400: Start the high-speed camera, turn on the start switch of the wave height meter, turn on the six-component force balance and flow meter, and release the water in the high-drop water tank into the transparent water pool through the water release mechanism;

[0023] S500: Take the water in the transparent pool and add it to the high drop water tank. After the water surface in the transparent pool stabilizes, proceed to the next experiment.

[0024] Compared with the existing technology, the beneficial effects of the present invention are: the present invention can conduct a systematic study on the ship resistance, ship posture and motion response during the process of ships entering and exiting the ship compartment, comprehensively improve the operating efficiency of the Three Gorges Ship Lift, help ensure the long-term stable and efficient operation of the ship lift, realize the rapid passage of passenger and cargo ships, special ships, etc. through the dam, and also provide new methods and technical means for the development and application of traction of ships entering and exiting the ship compartment of the Three Gorges Ship Lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0026] Figure 2 is a top view of an embodiment of the present invention;

[0027] Figure 3 2 is a schematic structural diagram of a mooring rack according to an embodiment of the present invention.

[0028] Figure numerals: 1. High drop water tank; 2. Transparent water pool; 3. Rectangular main frame; 4. Support plate; 5. Steel wire rope; 6. Guide pulley; 7. Pulley mounting frame; 8. Guide rail frame; 9. Baffle; 10. Baffle seat; 11. Water tank gate; 12. Mounting frame; 13. Flow meter; 14. Wave height meter; 15. Horizontal mooring rod; 16. Six-component force balance; 17. Pushed ship model and booster ship model; 18. Motor; 19. Winding shaft; 20. High-speed camera; 21. Cable; 22. Mooring slider; 23. Vertical support column; 24. Connecting slider. DETAILED DESCRIPTION

[0029] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0031] Example 1

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides an active large-amplitude long tunnel double-ship combined ship hydrodynamic experimental device, including a transparent water pool 2, a water pool bracket, a height drop difference generation system, a ship model mooring system, a measurement system, and a pushed ship model and a booster ship model 17.

[0033] like Figure 1 and Figure 2 As shown, the transparent pool 2 is a rectangular parallelepiped made of fiberglass reinforced plastic with an open top. A drain pipe with a drain valve can also be provided on the lower end wall of the transparent pool 2 to release water from the pool 2. The actual length of the Three Gorges Navigation Channel is approximately 256 meters and the width is approximately 30 meters. Based on a 1:20 scale and taking into account the actual site size, a transparent pool 2 measuring 10 meters long and 1 meter wide was designed for the experimental simulation. The maximum water depth of the Three Gorges Navigation Channel during the dry season is approximately 141 meters, and during the flood season it is approximately 175 meters. The designed height of the transparent pool 2 is 1.7 meters.

[0034] like Figure 1 and Figure 2 As shown, the water pool support includes a rectangular main frame 3, a pulley mounting frame 7, a guide rail frame 8 and a measuring mounting frame 12. The transparent water pool 2 is set on the rectangular main frame 3. The length direction of the rectangular main frame 3 is the same as the length direction of the transparent water pool 2. Since the transparent water pool 2 can accommodate about 8m in the extreme case, 3 The total weight of the water, plus the corresponding experimental equipment, is nearly 10t, so the rectangular main frame 3 should be made of high-strength and high-hardness metal materials. The two sides of the lower end of the guide rail frame 8 are L-shaped structures, which are clamped on the upper end of the rectangular main frame 3 and can move on the rectangular main frame 3 along its length. The pulley mounting frame 7 is set on the upper end of the guide rail frame 8. The guide rail frame 8 includes a vertical frame section, and a vertical slide is provided on the vertical frame section. The vertical slide is slidably connected to the slide, and the slide can slide up and down in the vertical slide. A plurality of bolts for fixing the slide are sequentially provided on the vertical frame section of the guide rail frame 8 along the height direction. There are multiple measuring mounting frames 12 arranged along the length direction of the rectangular main frame 3. The measuring mounting frames 12 include a cross bar and a mounting rod. The cross bar spans the rectangular main frame 3 along the width direction of the rectangular main frame 3. Slide sleeves are provided at both ends of the cross bar. The cross bar is connected to the rectangular main frame 3 through the slide sleeve. The slide sleeve can slide along the rectangular main frame 3. The slide sleeve is provided with a bolt to fix the slide sleeve on the rectangular main frame 3. The mounting rod is connected to the cross bar. The mounting rod is a vertical rod and is arranged in the middle position of the mounting rod.

[0035] like Figure 1 and Figure 2As shown, the high-drop generation system includes a high-drop water tank 1 and a water discharge mechanism. The high-drop water tank 1 is a rectangular water tank with an open top and an opening on the right side. The high-drop water tank 1 is connected to the lower end of the carriage. Because the guide rail frame 8 can move along its length on the rectangular main frame 3, the left and right position of the high-drop water tank 1 can be adjusted. Because the carriage can be adjusted up and down, the height of the high-drop water tank 1 can also be adjusted. Therefore, the horizontal and vertical positions of the high-drop water tank 1 are both adjustable. The water discharge mechanism includes a support plate 4, a wire rope 5, a guide pulley 6, a water tank gate 11, a motor 18, and a winding shaft 19. The water tank gate 11 is located at the opening on the right side of the high-drop water tank 1. The support plate 4 is mounted on the guide rail frame 8 and is located directly above the transparent pool 2. The motor 18 and winding shaft 19 are mounted on the support plate 4. The motor 18 is connected to the winding shaft 19, and the motor 18 drives the winding shaft 19 to rotate. Two steel ropes 5 are provided, both wound around a winding shaft 19. Two sets of guide pulleys 6 are provided, both mounted on a pulley mounting frame 7. Each set of guide pulleys 6 includes two guide pulleys 6, one of which is located directly above the winding shaft 19, and the other is located directly above the water tank gate 11. The two steel ropes 5 pass through the two sets of guide pulleys 6 and are connected to both ends of the water tank gate 11. When the motor 18 is started, the motor 18 drives the winding shaft 19 to rotate, continuously winding the steel rope 5 around the winding shaft 19. The steel rope 5 can then lift the water tank gate 11 vertically upward, allowing the water in the high-drop water tank 1 to be released into the transparent water pool 2, causing the water in the transparent water pool 2 to generate water flow fluctuations. A baffle seat 10 is mounted on the guide rail frame 8, and a baffle 9 is installed in the baffle seat 10. The baffle 9 is located directly above the water tank gate 11, and the height position of the baffle 9 is adjustable. The baffle 9 can limit the rise of the water tank gate 11, so that the rising distance of the water tank gate 11 will not be too high. In this way, the discharge speed of the high drop tank 1 can be controlled, and the water in the high drop tank 1 can be slowly and steadily discharged into the transparent pool 2, achieving the same effect as the slow and steady rise process of the starting gate of the Three Gorges ship compartment.

[0036] like Figure 1 、 Figure 2 and Figure 3As shown, the ship model mooring system includes a mooring rack and a cable 21. There are two mooring racks, which are located on both sides of the width direction of the transparent pool 2 and are both located on the inner side of the transparent pool 2. The mooring rack includes a horizontal mooring rod 15 and two vertical support columns 23. The horizontal mooring rod 15 is provided with a horizontal slide groove along its length, and a mooring slider 22 is provided in the horizontal slide groove. The number of mooring sliders 22 can be set according to actual use needs. The mooring slider 22 is provided with a mooring point, which can be a lifting ring, a bolt, etc., for connecting the cable 21. The horizontal mooring rod 15 is provided with a long horizontal through hole leading to the horizontal slide groove along its length. The mooring slider 22 is provided with a threaded hole. A first fixing bolt is installed in this threaded hole. The rod of the first fixing bolt passes through the horizontal through hole. The first fixing bolt can fix the mooring slider 22. The vertical support columns 23 are connected to the inner wall of the transparent pool 2. Vertical slide grooves are provided along the height of the vertical support columns 23. A connecting slider 24 is provided in the vertical slide grooves. A long vertical through-hole leading to the vertical slide grooves is provided along the length of the vertical support columns 23. The connecting slider 24 has a threaded hole on its sidewall, and a second fixing bolt is installed in this threaded hole. The rod of the second fixing bolt passes through the vertical through-hole, and the second fixing bolt secures the connecting slider 24. The ends of the horizontal mooring rod 15 are respectively fixedly connected to the connecting sliders 24 in the vertical slide grooves of the two vertical support columns 23. The second fixing bolt secures the horizontal mooring rod 15. Therefore, the height position of the horizontal mooring rod 15 can be adjusted according to usage needs. After adjustment, it can be secured with the second fixing bolt. There are cables 21 on both sides of the pushed ship model and the booster ship model 17. One end of the cable 21 is connected to the pushed ship model and the booster ship model 17, and the other end is connected to the mooring frame.

[0037] like Figure 1 and Figure 2As shown, the measurement system includes a flow meter 13, a wave height meter 14, a six-component force balance 16, a high-speed camera 20, a water surface height scale, and a water surface length scale. The water surface length scale and the water surface height scale are both made of scale stickers and are affixed to the outer wall of the transparent pool 2. The water surface length scale covers the entire length of the transparent pool 2, and the water surface height scale covers the entire height of the transparent pool 2. The six-component force balance 16 is set on the pushed ship model and the booster ship model 17. The six-component force balance 16 is a high-precision measuring instrument that can be used to measure fluid lift, drag, side force, pitching moment, rolling moment, and yaw moment. During this experiment, the main measurement indicators of the six-component force balance 16 are the driven force and torque generated by the pushed ship model and the booster ship model 17 when the water surface disturbance occurs. A high-speed camera 20 is installed outside the transparent pool 2 and fixed separately to an external bracket. The mounting angle of the high-speed camera 20 should be adjusted so that it is aligned with the pushed and booster boat models 17. The high-speed camera 20 can capture image changes within a very short time frame and is used to study transient changes within a certain period of time. In this experiment, it can be used to capture the motion response of the pushed and booster boat models 17 when a water surface disturbance arrives. The number of high-speed cameras 20 can be set as needed. When multiple high-speed cameras 20 are installed, some of them can be used to capture the entire experimental process or other experimental locations outside the pushed and booster boat models 17. The flow meter 13 is installed on the mounting rod of the measurement mounting frame 12 and is located between the high-drop water tank 1 and the pushed and booster boat models 17. The flow meter 13 can be used to measure the flow velocity of the water in the transparent pool 2. Five wave height meters 14 are installed, each mounted on a mounting rod of the five measurement mounting brackets 12. The five wave height meters 14 are installed as follows: the first wave height meter 14 is installed at the front end of the high drop water tank 1, the second and third wave height meters 14 are installed at the bow and stern ends of the pushed ship model and the booster ship model 17, respectively, the fourth wave height meter is installed at the stern end of the transparent pool 2, and the fifth wave height meter is installed between the high drop water tank 1 and the pushed ship model and the booster ship model 17. The five wave height meters 14 are used to measure the wave height range when the water surface disturbance reaches the location where they are installed.

[0038] Example 2:

[0039] This embodiment provides a method for testing the hydrodynamics of a dual-ship combination ship in a long tunnel with a large amplitude, which is implemented using the active hydrodynamics testing device for a dual-ship combination ship in a long tunnel with a large amplitude, as proposed in Example 1. Specifically, the method includes the following steps:

[0040] S100: Clean transparent pool 2 and then add clean water to the desired height based on experimental requirements. Adjust the horizontal and vertical positions of high-drop tank 1 so that its lower end is in contact with the water surface in transparent pool 2. This ensures that when water is released from high-drop tank 1, the water surface in transparent pool 2 is always level with the liquid level, eliminating the effects of gravitational potential energy. After adjusting the position of high-drop tank 1, add clean water.

[0041] S200: The pushed and booster boat models 17 are placed steadily in the water of the transparent pool 2 and secured using the boat model mooring system. Before securing the pushed and booster boat models 17, the water depth and the positions of the pushed and booster boat models 17 after entering the water must be determined in advance. The pushed and booster boat models 17 are secured in the pre-determined positions according to the experimental plan. The pushed and booster boat models 17 are secured so that they can float slightly in the transparent pool 2 with a certain degree of slack even when disturbed.

[0042] S300: Install the current meter 13, wave height meter 14, six-component force balance 16, and high-speed camera 20. The six-component force balance 16 is mounted on the pushed and booster boat models 17. The current meter 13 is mounted on the mounting rod of the measurement mounting frame 12 and is located between the height drop tank 1 and the pushed and booster boat models 17. The high-speed camera 20 is installed outside the transparent pool 2 and is separately fixed to an external bracket. The mounting angle of the high-speed camera 20 is adjusted so that it is aligned with the pushed and booster boat models 17. There are five wave height meters 14, which are respectively installed on the mounting rods of five measuring mounting frames 12. The installation positions of the five wave height meters 14 are as follows: the first wave height meter 14 is set at the front end of the high drop water tank 1, the second and third wave height meters 14 are respectively set at the bow and stern ends of the pushed ship model and the booster ship model 17, the fourth wave height meter is set at the tail end of the transparent water pool 2, and the fifth wave height meter is set between the high drop water tank 1 and the pushed ship model and the booster ship model 17.

[0043] S400: Activate the high-speed camera 20, turn on the start switch of the wave height meter 14, turn on the six-component force balance 16 and the flow meter 13, and start the motor 18. The motor 18 drives the winding shaft 19 to rotate, continuously winding the wire rope 5 around the winding shaft 19. The wire rope 5 lifts the water tank gate 11 vertically upward, and the water in the high-drop tank 1 is released into the transparent pool 2, causing the water in the transparent pool 2 to generate current fluctuations and surface disturbances. The water in the high-drop tank 1 flows out at a constant speed and, through conduction, reaches the pushed ship model and the booster ship model 17, creating disturbances. The experimental phenomenon, i.e., the corresponding motion process of the ship models, is observed. The water in the high-drop tank 1 eventually reaches the rear end of the transparent pool 2. After the experiment is completed, the measurement system is shut down and the collected data is analyzed. After the analysis is completed, the positions of the pushed ship model and the booster ship model 17 affected by the disturbance are restored, and the position of the water tank gate 11 is restored.

[0044] S500: Water from transparent pool 2 is added to high-drop water tank 1 to prevent the water level in transparent pool 2 from fluctuating before and after each experiment. The next experiment is conducted after the water level in transparent pool 2 stabilizes. After the experiment, different experimental data must be obtained and compared with the standard model to evaluate the accuracy and precision of the results.

[0045] The working principle of the present invention is as follows: the wave height meter 14 is used to measure and record wave height data. The wave height meter 14 set at the front end of the high drop difference water tank 1 is used to record the size of the disturbed water level at the moment the water tank gate 11 is opened, and compared with the pre-data in the experimental plan to ensure the accuracy of the experiment. The wave height meter 14 set at the tail end (i.e. the cecum part) of the transparent water pool 2 is used to record the size of the disturbance when it propagates to the end point. At the same time, it can also record the size of the backflow wave to eliminate the corresponding influence of the backflow on the movement of the pushed ship model and the booster ship model 17. The other three wave height meters 14 are used to measure and record the real-time situation on the disturbance propagation path and the head and tail ends of the pushed ship model and the booster ship model 17 for subsequent experimental data analysis. The six-component force balance, together with the pushed ship model and the booster ship model 17, is affected by the disturbance caused by the discharge of water from the high drop difference water tank 1, and measures the size of the force and torque received by the pushed ship model and the booster ship model 17 under the disturbance. The high-speed camera 20 can capture image changes over a very short timeframe and is used to study transient changes over a certain period of time. In this experiment, it was used to capture the motion responses of the pushed and booster boat models 17 when a water surface disturbance occurred. The high-speed camera 20 also captures images of the entire experimental process, providing a reliable data source for subsequent data and image processing. The current meter 13 is used to capture real-time changes in the flow field velocity and other parameters within the transparent pool 2.

[0046] In summary, through experiments, the present invention can conduct a systematic study on the ship resistance, ship posture and motion response during the process of ships entering and exiting the ship compartment, comprehensively improve the operating efficiency of the Three Gorges Ship Lift, help ensure the long-term stable and efficient operation of the ship lift, and realize the rapid passage of passenger and cargo ships, special ships, etc. through the dam, and also provide new methods and technical means for the development and application of traction of ships entering and exiting the ship compartment of the Three Gorges Ship Lift.

[0047] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An active large-amplitude long tunnel double-ship combined ship hydrodynamic experimental device, comprising a pushed ship model and a booster ship model (17), characterized in that: Also includes: A rectangular transparent pool (2); A water pool support, connected to the transparent water pool (2); A high drop difference generating system is arranged on a water pool support and comprises a high drop difference water tank (1) and a water discharge mechanism, wherein the water discharge mechanism can discharge water in the high drop difference water tank (1) into a transparent water pool (2), so that the water in the transparent water pool (2) generates water flow fluctuations; A ship model mooring system comprises a mooring frame and a cable (21), wherein the mooring frame is arranged on the inner side of a transparent water pool (2), and the cable (21) is used to connect the mooring frame and the pushed ship model and the booster ship model (17); The measuring system comprises a flow rate measuring instrument (13), a wave height meter (14), a six-component force measuring balance (16), a high-speed camera (20) and a water level scale, wherein the flow rate measuring instrument (13) is used to measure the flow rate of water in a transparent water pool (2), the wave height meter (14) is used to measure the water level fluctuation in the transparent water pool (2), the six-component force measuring balance (16) is arranged on a pushed ship model and a booster ship model (17), the high-speed camera (20) is used to photograph the pushed ship model and the booster ship model (17), and the water level scale is used to measure the water level of the transparent water pool (2).

2. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 1 is characterized in that: The transparent water pool (2) is made of glass fiber reinforced plastic and is provided with an opening at the upper end. The measuring system further comprises a water surface length scale. Both the water surface length scale and the water surface height scale are made of scale stickers and are both attached to the outer wall of the transparent water pool (2). The water surface length scale covers the entire length of the transparent water pool (2), and the water surface height scale covers the entire height of the transparent water pool (2).

3. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 1 is characterized in that: The side opening of the high drop water tank (1) is provided, and the water discharge mechanism comprises a supporting plate (4), a steel wire rope (5), a guide pulley (6), a water tank gate (11), a motor (18) and a winding shaft (19), wherein the water tank gate (11) is provided at the side opening of the high drop water tank (1); the supporting plate (4) is provided on the water pool bracket and is located directly above the transparent water pool (2); the motor (18) and the winding shaft (19) are provided on the supporting plate (4); the motor ( 18) is connected to the winding shaft (19), and the motor (18) can drive the winding shaft (19) to rotate; the steel wire ropes (5) are provided with two, and both are wound on the winding shaft (19), and the guide pulleys (6) are provided with two groups, and both are arranged on the water tank bracket, and the two steel wire ropes (5) pass through the two groups of guide pulleys (6) and are connected to the two ends of the water tank gate (11), and the two steel wire ropes (5) can lift the water tank gate (11) vertically upward under the action of the motor (18).

4. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 3 is characterized in that: Each group of guide pulleys (6) includes two guide pulleys (6), one of which is located just above the winding shaft (19), and the other is located just above the water tank gate (11).

5. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 3 is characterized in that: The water pool support comprises a rectangular main frame (3), a pulley mounting frame (7), a guide rail frame (8) and a measuring mounting frame (12); the transparent water pool (2) is arranged on the rectangular main frame (3); the length direction of the rectangular main frame (3) is the same as the length direction of the transparent water pool (2); the guide rail frame (8) is arranged at the upper end of the rectangular main frame (3); the guide rail frame (8) can move along the length direction of the rectangular main frame (3); the pulley mounting frame (7) is arranged at the upper end of the guide rail frame (8); the guide pulley (6) is mounted on the pulley mounting frame (7); the guide rail frame (8) comprises a vertical frame section; a vertical slide groove is provided on the vertical frame section; a slide is slidably connected in the vertical slide groove; the slide can be moved along the length direction of the guide rail frame (8 ... guide rail frame (8) comprises a vertical frame section; a vertical slide groove is provided on the vertical frame section; a slide is slidably connected in the vertical slide groove; the slide can be moved along the length direction of the guide rail frame (8); the guide rail frame (8) comprises a vertical frame section; a vertical slide groove is provided on the vertical frame section; a slide is slidably connected in the vertical slide groove; the slide can be moved along the length direction of the guide rail frame The guide rail frame (8) slides up and down in the vertical slide groove, and a plurality of bolts for fixing the slide are sequentially arranged on the vertical frame section along the height direction, and the high drop difference water tank (1) is arranged at the lower end of the slide; the measuring mounting frame (12) is provided with a plurality of bolts along the length direction of the rectangular main frame (3), and the measuring mounting frame (12) includes a cross bar and a mounting rod, and a sliding sleeve is provided at both ends of the cross bar. The cross bar is connected to the rectangular main frame (3) through the sliding sleeve, and the sliding sleeve can slide along the rectangular main frame (3), and a bolt for fixing the sliding sleeve on the rectangular main frame (3) is provided on the sliding sleeve. The mounting rod is connected to the cross bar, and the flow meter (13) and the wave height meter (14) are installed on the mounting rod of the measuring mounting frame (12).

6. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 5 is characterized in that: A baffle seat (10) is installed on the guide rail frame (8), a baffle (9) is installed in the baffle seat (10), and the baffle (9) is located just above the water tank gate (11). The height position of the baffle (9) is adjustable.

7. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 1 is characterized in that: At least five wave height meters (14) are arranged along the length direction of the transparent water pool (2), the first wave height meter (14) is arranged at the front end of the water tank gate (11), the second and third wave height meters (14) are respectively arranged at the head and tail ends of the pushed ship model and the booster ship model (17), the fourth wave height meter is arranged at the tail end of the transparent water pool (2), and the fifth wave height meter is arranged between the water tank gate (11) and the pushed ship model and the booster ship model (17).

8. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 1 is characterized in that: The length direction of the mooring rack is the same as the length direction of the transparent pool (2), and two mooring racks are provided, and are respectively located on both sides of the width direction of the transparent pool (2); both sides of the pushed ship model and the booster ship model (17) are provided with cables (21), one end of the cable (21) is connected to the pushed ship model and the booster ship model (17), and the other end is connected to the mooring rack.

9. The active large-amplitude long tunnel dual-ship combined ship hydrodynamic experimental device according to claim 8 is characterized in that: The mooring rack comprises a horizontal mooring rod (15) and two vertical supporting columns (23), the horizontal mooring rod (15) is provided with a horizontal slide groove along its length direction, a mooring slider (22) is provided in the horizontal slide groove, a mooring point is provided on the mooring slider (22), a long horizontal through hole leading to the horizontal slide groove is provided on the horizontal mooring rod (15) along its length direction, a threaded hole is provided on the mooring slider (22), a first fixing bolt is installed in the threaded hole, and the rod of the first fixing bolt passes through the horizontal through hole; the vertical supporting column (23) is provided with a horizontal slide groove along its length direction, a mooring slider (22) is provided with a threaded hole, and a first fixing bolt is installed in the threaded hole, and the rod of the first fixing bolt passes through the horizontal through hole; The column (23) is connected to the inner wall of the transparent water pool (2), and a vertical slide groove is provided on the vertical support column (23) along its height direction, and a connecting slider (24) is provided in the vertical slide groove. A long vertical through hole leading to the vertical slide groove is provided on the vertical support column (23) along its length direction, and a threaded hole is provided on the side wall of the connecting slider (24), and a second fixing bolt is installed in the threaded hole. The rod of the second fixing bolt passes through the vertical through hole, and the two ends of the horizontal mooring rod (15) are respectively fixedly connected to a connecting slider (24).

10. A method for hydrodynamic testing of a dual-vessel combination ship in a long tunnel with a large amplitude, implemented using the hydrodynamic testing device for a dual-vessel combination ship in a long tunnel with a large amplitude, as described in any one of claims 1 to 9, characterized in that: The specific steps include: S100: Cleaning the transparent water pool (2), and then adding clean water to the transparent water pool (2) to a desired height according to experimental requirements; adjusting the height of the high drop difference water tank (1) so that the lower end of the high drop difference water tank (1) is in contact with the water surface in the transparent water pool (2), and injecting clean water into the high drop difference water tank (1); S200: The pushed boat model and the booster boat model (17) are stably placed in the water of the transparent pool (2) and fixed by the boat model mooring system; S300: Install a flow meter (13), a wave height meter (14), a six-component force balance (16) and a high-speed camera (20). The six-component force balance (16) is installed on the pushed ship model and the booster ship model (17). The flow meter (13) is installed on the pool bracket and is located between the high drop water tank (1) and the pushed ship model and the booster ship model (17). The high-speed camera (20) is set outside the transparent pool (2) and is fixed separately on the peripheral bracket. The installation angle of the high-speed camera (20) is adjusted so that the high-speed camera can capture the image. The machine (20) is aligned with the pushed ship model and the booster ship model (17); there are five wave height meters (14), all of which are installed on the pool bracket, and the installation positions of the five wave height meters (14) are as follows: the first wave height meter (14) is set at the front end of the high drop difference water tank (1), the second and third wave height meters (14) are respectively set at the front and rear ends of the pushed ship model and the booster ship model (17), the fourth wave height meter is set at the rear end of the transparent pool (2), and the fifth wave height meter is set between the high drop difference water tank (1) and the pushed ship model and the booster ship model (17); S400: Start the high-speed camera (20), turn on the start switch of the wave height meter (14), turn on the six-component force balance (16) and the flow meter (13), and release the water in the high-drop water tank (1) into the transparent water pool (2) through the water release mechanism; S500: Take the water in the transparent water pool (2) and add it into the high drop water tank (1). After the water surface in the transparent water pool (2) is stable, the next experiment is carried out.

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