Large test pool side wall wave absorber capable of ascending and descending in air floatation mode and working method of large test pool side wall wave absorber

Abstract

The invention discloses a large-scale test pool side wall wave absorber capable of air floatation lifting and a working method thereof, and belongs to the technical field of hydraulic engineering experiment equipment. The wave absorber comprises an air flotation lifting device, a wave absorbing device and an intelligent control system, the air flotation lifting device comprises a water ballast space, an air path system and a vertical guide rail, and net buoyancy is changed by adjusting the water amount in the space through inflation and exhaust; the wave absorbing device consists of an inclined wave absorbing plate and a mounting frame and is fixed above the air floatation lifting device; the intelligent control system is integrated with a water depth sensor and an intelligent controller controlled by a PID (Proportion Integration Differentiation) to realize accurate depth regulation and control The working modes of the robot include floating, sinking and hovering, the robot can ascend or descend or stably hover through the inflation and exhaust driving device, and the robot further has the functions of automatic depth setting and working condition self-adaptive depth adjustment. A complex mechanical structure is abandoned, the structure is simple, cost is low, reliability is high, full-water-depth stepless precise adjustment can be achieved, complete hiding can be achieved when a pure flow field is needed, flow field interference is extremely small, and the intelligent degree is high.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water conservancy engineering experimental equipment, and particularly relates to a large-scale test pool side wall wave absorber capable of air floating lifting and a working method thereof. BACKGROUND

[0002] In the scientific research and test in the fields of ship ocean engineering, water conservancy engineering and the like, a large-scale test pool is a core facility for simulating a wave environment and testing equipment performance. During the experiment, the waves generated by the wave making device and the residual waves and reflected waves after the experiment will interfere with the stability of the experimental environment and even affect the safety of the pool structure, and therefore an effective wave absorbing device must be arranged in the pool.

[0003] A traditional solution is to install a fixed wave absorbing structure, such as a wave absorbing grid or an inclined body, at the end of the pool. Although this fixed type solution has a simple structure and low cost, it has significant defects. When the pool side wall is required to be smooth and flat to avoid unnecessary wave reflection, the permanent wave absorbing structure will interfere with the flow field, resulting in distorted experimental data. At the same time, the fixed type structure cannot flexibly adjust the wave absorbing state and draft according to the wave period and wave height of the experimental conditions, and the function is rigid.

[0004] To solve the flexibility problem of the fixed type wave absorbing device, a lifting type wave absorbing device appears in the prior art, of which the most typical one is a scheme using a mechanical lifting mechanism. The device mainly comprises a wave absorbing body, a mechanical lifting mechanism and a control system. The wave absorbing body is an inclined wave absorbing plate and a support frame. The mechanical lifting mechanism comprises a pool bottom driving source (such as a hydraulic cylinder, an electric push rod or the like), a vertical rigid guide rail and a lifting platform. The control system controls the driving source to start and stop to realize the lifting of the wave absorbing body.

[0005] However, the mechanical lifting type scheme has many inherent defects. Firstly, it relies on a complex external mechanical power and transmission system, resulting in high manufacturing cost and high installation and maintenance cost. A large number of moving parts and sealing elements are in a humid and submerged environment for a long time, which is prone to corrosion, wear and sealing failure, and has low reliability and frequent maintenance. Secondly, the adjustment flexibility is poor. It can usually only move between a few preset positions, and it is difficult to realize fine and continuous depth stepless adjustment, and it cannot accurately match the changing experimental conditions, which limits the wave absorbing efficiency. Thirdly, the rigid guide rail and large support structure need to be permanently fixed and installed. Even if the wave absorbing body is lowered to the pool bottom, these protruding structures will still continuously interfere with the water flow and wave field, destroying the purity of the experimental flow field, and cannot meet the requirements of high-precision hydrodynamic experiments.

[0006] Therefore, there is an urgent need for a new type of wave absorbing device with a simple structure, low cost and reliable work, and capable of realizing flexible adjustment and reducing flow field interference, to solve the problems existing in the prior art. SUMMARY

[0007] This invention discloses a large-scale air-floating and liftable wave damper for the sidewall of an experimental water tank and its operating method. The aim is to provide a simple, low-cost, and reliable wave damping device drive solution, eliminating complex mechanical lifting mechanisms and solving the problems of high cost and high failure rate through buoyancy adjustment. It achieves stepless, precise depth adjustment and stable hovering of the wave damper across the entire water depth range, matching the optimal working depth for different experimental conditions. It eliminates interference from the wave damper on the experimental flow field, allowing for complete concealment when a clean flow field is required. It integrates intelligent control functions, enabling automatic depth setting and adaptive depth adjustment, improving operational convenience and the adaptability of the wave damping effect.

[0008] This invention provides a large-scale test water tank sidewall wave damper that can be air-floated and raised. The large-scale test water tank is equipped with a wave-generating device for generating waves and a wave damper for eliminating waves. The wave damper includes an air-floating and raising device, a wave damping device, and an intelligent control system. The air flotation lifting device is installed on both sides of a large test water tank and is used to raise, lower, or hover the device by changing its net buoyancy. The air flotation lifting device includes a sealed ballast water tank, an air circuit system, and a vertical guide rail. The bottom of the ballast water tank is provided with a bottom water inlet for free water inflow and outflow. The air circuit system is connected to the top of the ballast water tank and is used to control the amount of air in the ballast water tank. The vertical guide rail is fixedly installed on the wall of the large test water tank and the ballast water tank can move along the vertical guide rail. The wave-dissipating device is fixedly installed above the air-float lifting device, and is supported and driven to lift by the air-float lifting device to dissipate wave energy. The intelligent control system is electrically connected to the air flotation lifting device and is used to control and adjust the depth of the air flotation lifting device.

[0009] Preferably, the air system includes an air duct, a three-way control valve, an inflation pipe, an exhaust pipe, and an air compressor; the air duct is connected to the top of the ballast water tank, the three-way control valve is connected to the air duct, the two ends of the inflation pipe are respectively connected to the three-way control valve and the air compressor, and one end of the exhaust pipe is connected to the three-way control valve, while the other end is connected to the atmosphere.

[0010] Preferably, the three-way control valve has three states: inflation position, deflation position, and closed position; in the inflation position, the vent pipe is connected to the inflation pipe; in the deflation position, the vent pipe is connected to the deflation pipe; and in the closed position, the passage between the inflation pipe and the deflation pipe is closed.

[0011] Preferably, the wave-damping device includes a wave-damping plate mounting frame and multiple inclined wave-damping plates fixed on the wave-damping plate mounting frame. The inclined wave-damping plates are used to dissipate wave energy, and the wave-damping plate mounting frame is fixedly connected to the air-float lifting device.

[0012] Preferably, the intelligent control system includes a water depth sensor and an intelligent controller; the water depth sensor is used to measure the depth of the air flotation lifting device in real time and convert the depth signal into an electrical signal output; the intelligent controller is a programmable logic controller or an embedded computer, whose input terminal receives the depth signal from the water depth sensor and external depth setting instructions or operating parameters, and whose output terminal is connected to and controls the start and stop of the air compressor and the position switching of the three-way control valve.

[0013] The present invention also provides a working method for a large-scale test pool sidewall wave damper that can be air-floated and raised. The water depth sensor of the intelligent control system detects the depth of the air-floating and raising device in real time. The intelligent controller of the intelligent control system receives operation instructions and selects the corresponding operating mode based on the operation instructions. The operating modes include at least floating mode, sinking mode, and hovering mode; according to the selected operating mode, the corresponding air circuit control and state adjustment operations of the air flotation lifting device are executed to realize the floating, sinking, or hovering of the wave damper.

[0014] Preferably, the execution steps of the floating mode are as follows: when wave suppression is required, the three-way control valve is switched to the inflation position and the air compressor is started. Compressed air enters the top of the ballast water tank through the inflation pipe, the three-way control valve and the air pipe, and forces the water in the tank out from the bottom water outlet. The total weight of the wave suppressor is reduced and the net buoyancy is increased, thereby floating along the vertical guide rail and driving the wave suppressor to rise to the working depth. The execution steps of the sinking mode are as follows: when a pure flow field is required for the experiment, the three-way control valve is switched to the exhaust position, the gas in the ballast water tank is discharged into the atmosphere through the exhaust pipe, the pressure in the tank decreases, and the external water rushes in from the bottom water inlet under the action of static pressure, the total weight of the wave damper increases, the net buoyancy decreases, and thus sinks along the vertical guide rail until the wave damping device is completely seated at the bottom of the large test water pool, achieving concealment; The execution steps of the hovering mode are as follows: by controlling the inflation / deflation volume, after the wave-damping device approaches the target depth, the three-way control valve is switched to the closed position to cut off the air path. At this time, the gas volume inside the ballast water tank is sealed and fixed, and the gravity and buoyancy of the wave-damping device are balanced, so the wave-damping device can be maintained near the depth.

[0015] Preferably, the intelligent control system includes an automatic depth determination function, the execution steps of which are: the intelligent controller receives the set target depth. H_set The water depth sensor detects the actual depth in real time. H_real The data is then fed back to the intelligent controller, which calculates the actual depth. H_real Depth of target H_set deviation ΔH ,Right now ΔH = H_real - H_setDynamically adjust the position and duration of the three-way control valve. ΔH When the value is >0, the three-way control valve is switched to the inflation position for micro-inflation and drainage, causing the air flotation lifting device to float; when ΔH When the value is less than 0, the three-way control valve is switched to the exhaust position to allow a small amount of air to be released and water to be introduced, causing the air flotation lifting device to sink.

[0016] Preferably, the intelligent controller has a built-in PID control algorithm, based on the deviation. ΔH And its changing trend, dynamically adjust the strength and duration of the control signal, and ultimately make the actual depth H_real Quickly and accurately stabilize at the target depth H_set .

[0017] Preferably, the intelligent control system includes an adaptive depth adjustment function, the execution steps of which are as follows: the intelligent controller receives a working condition signal characterizing wave conditions, the working condition signal may contain wave parameters required for the current experiment; the intelligent controller has a pre-stored "wave parameter-optimal wave attenuation depth" mapping table or calculation model, and automatically queries or calculates the optimal target depth based on the working condition signal. H_optimal The intelligent controller will H_optimal As a new setting value, the air flotation lifting device is driven to perform corresponding buoyancy, descent or hovering operations to adjust to the optimal target depth.

[0018] The beneficial effects of this invention are: (1) Simple structure, low cost and reliable operation: This invention abandons the traditional complex mechanical transmission components and adopts the buoyancy adjustment scheme of "ballast water tank + simple air circuit system". The number of parts is small, the processing difficulty is low, and the material cost is significantly reduced. The number of moving parts of the system is reduced, and the power and adjustment medium is air that is not easily corroded, which avoids the risk of corrosion, wear and sealing failure of mechanical parts in the underwater environment, improves the reliability of the equipment, and greatly reduces the maintenance workload.

[0019] (2) Flexible and precise depth adjustment: By controlling the amount of air / water in the ballast tank, the invention can linearly and continuously change the weight of the device, thereby achieving fine and smooth adjustment of the net buoyancy and the attitude of the device. This allows the wave damper to not only float or sink quickly, but also achieve stepless adjustment and stable hovering in the entire water depth range, significantly improving wave damping efficiency and adaptability to experimental conditions.

[0020] (3) Minimal interference with the experimental flow field: When a pure flow field is required, the present invention can completely submerge the entire wave damper at the bottom of the pool by venting and water intake, achieving complete concealment. Its upper surface can be flush with or embedded in the bottom of the pool, eliminating interference with the water flow and wave field, and providing pure boundary conditions for high-precision experiments.

[0021] (4) High level of intelligence: This invention integrates a water depth sensor and an intelligent controller to form a closed-loop control system, which can achieve automatic depth determination with centimeter-level accuracy and effectively resist water flow disturbance. At the same time, the intelligent controller can receive working condition signals that characterize wave conditions and make decisions and adjust to the optimal working depth accordingly, so that the device is upgraded from a manually operated device to an intelligent system that optimizes its operation, thereby improving the ease of operation and wave damping efficiency. Attached Figure Description

[0022] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the air flotation lifting device of the present invention; Figure 3 This is a flowchart illustrating the working principle of the air flotation lifting device of the present invention. Figure 4 This is a schematic diagram of the overall wave reduction of the present invention.

[0024] In the picture: 1. Large test water tank; 2. Wave generating device; 3. Air flotation lifting device; 3-1. Ballast water tank; 3-2. Bottom water inlet; 3-3. Air vent pipe; 3-4. Three-way control valve; 3-5. Air inflation pipe; 3-6. Exhaust pipe; 3-7. Air compressor; 3-8. Vertical guide rail; 3-9. Water depth sensor; 3-10. Intelligent controller; 4. Wave damping device; 4-1. Angled wave damping plate; 4-2. Wave damping plate mounting bracket. Detailed Implementation

[0025] The following are specific embodiments of the present invention described in conjunction with the accompanying drawings, further illustrating the technical solutions of the present invention. However, the present invention is not limited to these embodiments. Specific details, such as particular configurations and components, are provided in the following description merely to aid in a comprehensive understanding of the embodiments of the present invention. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0027] like Figures 1-4 As shown in the figure, a large-scale test pool sidewall wave damper and its working method are provided in an embodiment of the present invention. The large-scale test pool 1 is equipped with a wave-generating device 2 for generating waves and a wave damper for eliminating waves. The wave damper mainly includes an air-floating lifting device 3, a wave damping device 4, and an intelligent control system.

[0028] The air flotation lifting device 3 is installed on both sides of the large test water tank 1. Its core function is to drive the entire wave damper to rise, fall, or hover at a specific depth in the water tank by changing its own net buoyancy. Figure 2 As shown, the air flotation lifting device 3 includes a sealed ballast water tank 3-1, an air passage system, and a vertical guide rail 3-8. The ballast water tank 3-1 is the core component for buoyancy adjustment. It has a bottom water inlet 3-2 at its bottom, allowing water in the pool to freely enter and exit. The air passage system is connected to the top of the ballast water tank 3-1 and is used to fill or discharge gas into the tank, thereby controlling the amount of gas in the tank. The vertical guide rail 3-8 is fixedly installed on the wall of the large test pool 1, providing guidance for the vertical lifting and lowering movement of the ballast water tank 3-1 and even the entire wave damper, ensuring its smooth movement and preventing horizontal deviation. The ballast water tank 3-1 can move up and down along the vertical guide rail 3-8.

[0029] Specifically, the air system includes a ventilation pipe 3-3, a three-way control valve 3-4, an inflation pipe 3-5, an exhaust pipe 3-6, and an air compressor 3-7. One end of the ventilation pipe 3-3 is connected to the top of the ballast water tank 3-1, and the three-way control valve 3-4 is connected to the other end of the ventilation pipe 3-3. One end of the inflation pipe 3-5 is connected to the three-way control valve 3-4, and the other end is connected to the air compressor 3-7, serving as the air source for the system. One end of the exhaust pipe 3-6 is connected to the three-way control valve 3-4, and the other end is connected to the atmosphere, used to exhaust the gas inside the tank. The three-way control valve 3-4 is the core of the air circuit control. It has three states: inflation, deflation, and closed. In the inflation position, the vent pipe 3-3 is connected to the inflation pipe 3-5, allowing compressed air to enter the ballast water tank 3-1. In the deflation position, the vent pipe 3-3 is connected to the deflation pipe 3-6, allowing the gas in the tank to be discharged into the atmosphere. In the closed position, the passage between the inflation pipe 3-5 and the deflation pipe 3-6 is closed, the air circuit is cut off, and the current air pressure is maintained in the ballast water tank 3-1.

[0030] The wave-damping device 4 is fixedly installed above the air-float lifting device 3. It is supported and driven by the air-float lifting device 3 to move up and down. When the air-float lifting device 3 moves up and down, it drives the wave-damping device 4 to move up and down together. The wave-damping device 4 is used to dissipate wave energy. Its specific structure includes a wave-damping plate mounting frame 4-2 and multiple inclined wave-damping plates 4-1 fixed on the wave-damping plate mounting frame 4-2. The wave-damping plate mounting frame 4-2 is fixedly connected to the air-float lifting device 3. The function of the inclined wave-damping plates 4-1 is to disrupt the wave shape, converting wave energy into turbulence and other forms of energy for dissipation.

[0031] The intelligent control system is electrically connected to the air flotation lifting device 3 and is used to control and adjust the depth of the air flotation lifting device 3. The intelligent control system includes a water depth sensor 3-9 and an intelligent controller 3-10. The water depth sensor 3-9 is installed on the outside of the ballast water tank 3-1 and is used to measure the current depth of the air flotation lifting device 3 (i.e., the wave-damping device 4) in real time and convert the depth signal into an electrical signal output. The intelligent controller 3-10 is the control core of the system and can be a programmable logic controller (PLC) or an embedded computer, etc. Its input terminal receives the depth signal from the water depth sensor 3-9 and the depth setting command or parameter signal characterizing the experimental conditions (such as the wave parameters set by the wave generator) from the outside (such as the experimental main control console or operating terminal). Its output terminal is connected to and controls the start and stop of the air compressor 3-7 and the state switching of the three-way control valve 3-4 between the inflation position, the exhaust position, and the closed position.

[0032] The working principle of this invention is based on active buoyancy adjustment, which changes the total weight of the device by controlling the water volume in the ballast tank 3-1 through the air circuit system. Since the drainage volume of the device is mainly determined by its inherent structure and the change is relatively small, the net buoyancy can be continuously and linearly changed by adjusting the total weight of the device through active drainage (inflating to force water out) or water intake (expelling air to allow water to flow in), thereby achieving lifting or hovering.

[0033] The intelligent controller 3-10 receives operation commands (which can come from manual input or automatic programs), selects the corresponding operating mode, and the operating modes include at least floating mode, sinking mode and hovering mode. According to the selected operating mode, the intelligent controller 3-10 controls the air circuit system to perform the corresponding operation to realize the floating, sinking or hovering of the wave suppressor.

[0034] Specifically, the execution steps for each mode are as follows: Ascent Mode: When the wave-damping function needs to be activated, the intelligent controller 3-10 controls the three-way control valve 3-4 to switch to the inflation position and starts the air compressor 3-7; compressed air enters the top of the ballast water tank 3-1 through the inflation pipe 3-5, the three-way control valve 3-4, and the ventilation pipe 3-3. As air enters, the air pressure inside the tank increases, forcing the water inside the tank out through the bottom water outlet 3-2. The total weight of the air flotation lifting device 3 is reduced due to the water discharge, and the net buoyancy increases, thereby driving the air flotation lifting device 3 to rise along the vertical guide rail 3-8, and pulling the wave-damping device 4 above to the predetermined working depth (e.g., Figure 4 (as shown in the image), at this point the wave-damping plate 4-1 is submerged in water and begins to dissipate wave energy.

[0035] Sinking Mode: When a clean flow field is required during the experiment, the intelligent controller 3-10 controls the three-way control valve 3-4 to switch to the exhaust position. The gas in the ballast water tank 3-1 is discharged into the atmosphere through the exhaust pipe 3-6, reducing the pressure inside the tank. Under the action of the static pressure of the external water body, water flows into the ballast water tank 3-1 through the bottom water inlet 3-2. The total weight of the air flotation lifting device 3 increases due to the entry of water, and the net buoyancy decreases, thereby driving the air flotation lifting device 3 to sink along the vertical guide rail 3-8, continuously venting air and introducing water until the wave damping device 4 is completely seated at the bottom of the large test water tank 1. At this time, the entire wave damper is hidden at the bottom of the tank, and its upper surface can be flush with the bottom of the tank, minimizing the interference to the water flow and wave field.

[0036] Hovering Mode: By precisely controlling the duration or volume of inflation or deflation, once the wave-damping device 4 approaches the desired target depth, the intelligent controller 3-10 controls the three-way control valve 3-4 to switch to the closed position, cutting off the air supply. At this time, the gas volume and pressure within the ballast water tank 3-1 are sealed and fixed. By achieving an approximate balance between the device's gravity and buoyancy, the wave-damping device 4 can maintain stable hovering near that depth. Manual operation requires experience; however, with the automatic depth-keeping function described below, precise and stable hovering can be achieved.

[0037] Automatic depth determination function: The intelligent controller 3-10 receives the target depth value set by the user or generated by the system. H_set The water depth sensor 3-9 continuously monitors the actual depth of the device in real time. H_real The signal is then fed back to the intelligent controller 3-10. The intelligent controller 3-10 calculates the depth deviation. ΔH = H_real - H_set According to the deviation ΔH The size of the valve dynamically adjusts the position and duration of the three-way control valve 3-4: when ΔH When the depth is >0 (indicating the actual depth of the device is greater than the target depth, and the device is too deep), controller 3-10 controls the three-way control valve 3-4 to briefly switch to the inflation position for a small amount of inflation and drainage, slightly increasing the net buoyancy of the device and causing it to float upwards; when ΔH When the depth is less than 0 (indicating the actual depth of the device is less than the target depth, and the device is too shallow), controller 3-10 controls the three-way control valve 3-4 to briefly switch to the venting position, allowing for a small amount of venting and water intake, slightly reducing the net buoyancy of the device and causing it to sink. The intelligent controller 3-10 has a built-in PID control algorithm that can adjust the buoyancy based on the deviation. ΔH By dynamically adjusting the strength and duration of control signals (such as the on / off duty cycle of the inflation or deflation solenoid valve) based on their changing trends, a closed-loop negative feedback control system is formed, ultimately achieving the actual depth H_real Quickly and accurately stabilize at the target depth H_set The control precision can reach the centimeter level. Even in the event of water flow disturbance, the system can automatically adjust to maintain the depth.

[0038] Adaptive depth adjustment function: The intelligent controller 3-10 can also receive a working condition signal that characterizes the wave conditions required for the current experiment. This working condition signal may include wave height. Hs ,cycle T Parameters such as wave parameters and optimal wave attenuation depth are stored internally in the intelligent controller 3-10. Based on the received operating condition signals, the controller automatically queries the mapping table or uses the calculation model to obtain the target depth value that achieves the optimal wave attenuation effect under the current wave conditions. H_optimal Subsequently, the intelligent controller 3-10 will... H_optimal As the new depth setting value, and invoking the aforementioned automatic depth-fixing closed-loop control process, the air-float lifting device 3 is driven to perform corresponding buoyancy, descent, or hovering operations, automatically adjusting and stabilizing the wave-damping device 4 at the optimal target depth. H_optimal This allows the damper to autonomously and intelligently adjust to its optimal operating state according to changes in experimental conditions.

[0039] In summary, this invention provides an intelligent air-floating lifting wave-damping device that is simple in structure, low in cost, highly reliable, flexible in adjustment, and has minimal interference with the flow field. It can meet the dual high standards of wave-damping function and flow field purity required by large experimental pools under different experimental needs.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

Claims

1. A large-scale test water tank sidewall wave damper that can be air-floated and raised, characterized in that, The large test pool (1) is equipped with a wave-generating device (2) for generating waves and a wave-eliminating device for eliminating waves; The wave damper includes an air flotation lifting device (3), a wave damping device (4), and an intelligent control system; The air flotation lifting device (3) is installed on both sides of the large test water tank (1) and is used to raise, lower or hover the device by changing its own net buoyancy. The air flotation lifting device (3) includes a sealed ballast water tank (3-1), an air circuit system and a vertical guide rail (3-8). The bottom of the ballast water tank (3-1) is provided with a bottom water inlet (3-2) for free water inflow and outflow. The air circuit system is connected to the top of the ballast water tank (3-1) and is used to control the amount of air in the ballast water tank (3-1). The vertical guide rail (3-8) is fixedly installed on the wall of the large test water tank (1) and the ballast water tank (3-1) can move along the vertical guide rail (3-8). The wave-dissipating device (4) is fixedly installed above the air-floating lifting device (3), and is supported and driven by the air-floating lifting device (3) to dissipate wave energy; The intelligent control system is electrically connected to the air-floating lifting device (3) and is used to control and adjust the depth of the air-floating lifting device (3).

2. The large-scale test pool sidewall wave damper with air flotation and lifting capability according to claim 1, characterized in that, The air system includes a ventilation pipe (3-3), a three-way control valve (3-4), an inflation pipe (3-5), an exhaust pipe (3-6), and an air compressor (3-7). The ventilation pipe (3-3) is connected to the top of the ballast water tank (3-1). The three-way control valve (3-4) is connected to the ventilation pipe (3-3). The inflation pipe (3-5) is connected to the three-way control valve (3-4) and the air compressor (3-7) at both ends, respectively. One end of the exhaust pipe (3-6) is connected to the three-way control valve (3-4), and the other end is connected to the atmosphere.

3. The large-scale test pool sidewall wave damper that can be air-floated and raised according to claim 2, characterized in that, The three-way control valve (3-4) has three states: inflation position, exhaust position, and closed position. When in the inflation position, the air supply pipe (3-3) is connected to the inflation pipe (3-5); when in the exhaust position, the air supply pipe (3-3) is connected to the exhaust pipe (3-6); when in the closed position, the passage between the inflation pipe (3-5) and the exhaust pipe (3-6) is closed.

4. The large-scale test pool sidewall wave damper that can be air-floated and raised according to claim 1, characterized in that, The wave-damping device (4) includes a wave-damping plate mounting frame (4-2) and multiple inclined wave-damping plates (4-1) fixed on the wave-damping plate mounting frame (4-2). The inclined wave-damping plates (4-1) are used to dissipate wave energy. The wave-damping plate mounting frame (4-2) is fixedly connected to the air-float lifting device (3).

5. A large-scale test pool sidewall wave damper capable of air flotation and lifting according to claim 2, characterized in that, The intelligent control system includes a water depth sensor (3-9) and an intelligent controller (3-10). The water depth sensor (3-9) is used to measure the depth of the air-floating lifting device (3) in real time and convert the depth signal into an electrical signal output. The intelligent controller (3-10) is a programmable logic controller or an embedded computer. Its input end receives the depth signal from the water depth sensor (3-9) and external depth setting instructions or operating parameters. Its output end is connected to and controls the start and stop of the air compressor (3-7) and the position switching of the three-way control valve (3-4).

6. A method for operating a large-scale test pool sidewall wave damper capable of air flotation and lifting as described in any one of claims 1-5, characterized in that, The water depth sensor (3-9) of the intelligent control system detects the depth of the air flotation lifting device (3) in real time. The intelligent controller (3-10) of the intelligent control system receives the operation command and selects the corresponding operating mode based on the operation command. The operating modes include at least the floating mode, the sinking mode, and the hovering mode; according to the selected operating mode, the air path control and state adjustment operation corresponding to the air flotation lifting device (3) are executed to realize the floating, sinking or hovering of the wave damper.

7. The working method of a large-scale test pool sidewall wave damper that can be air-floated and raised according to claim 6, characterized in that, The execution steps of the floating mode are as follows: When wave suppression is required, switch the three-way control valve (3-4) to the inflation position and start the air compressor (3-7). Compressed air enters the top of the ballast water tank (3-1) through the inflation pipe (3-5), the three-way control valve (3-4) and the ventilation pipe (3-3), and forces the water in the tank out from the bottom water outlet (3-2). The total weight of the wave suppressor is reduced and the net buoyancy is increased, thereby floating along the vertical guide rail (3-8) and driving the wave suppressor (4) to rise to the working depth. The execution steps of the sinking mode are as follows: When the experiment requires a pure flow field, switch the three-way control valve (3-4) to the exhaust position. The gas in the ballast water tank (3-1) is discharged into the atmosphere through the exhaust pipe (3-6). The pressure inside the tank decreases, and the external water rushes in from the bottom water inlet (3-2) under the action of static pressure. The total weight of the wave damper increases and the net buoyancy decreases, so it sinks along the vertical guide rail (3-8) until the wave damping device (4) is completely seated on the bottom of the large test water tank (1) and is hidden. The execution steps of the hovering mode are as follows: by controlling the inflation / deflation volume, after the wave-damping device (4) approaches the target depth, switch the three-way control valve (3-4) to the closed position to cut off the air path. At this time, the gas volume in the ballast water tank (3-1) is sealed and fixed, the gravity and buoyancy of the wave-damping device are balanced, and the wave-damping device (4) can be maintained near the depth.

8. The working method of a large-scale test pool sidewall wave damper that can be air-floated and raised according to claim 6, characterized in that, The intelligent control system includes an automatic depth determination function, the execution steps of which are as follows: The intelligent controller (3-10) receives the set target depth. H_set ; The depth sensor (3-9) detects the actual depth in real time. H_real And feed it back to the intelligent controller (3-10); The intelligent controller (3-10) calculates the actual depth. H_real Depth of target H_set deviation ΔH ,Right now ΔH = H_ real - H_set Dynamically adjust the position and duration of action of the three-way control valve (3-4). ΔH When > 0, control the three-way control valve (3-4) to switch to the inflation position for micro-inflation and drainage, causing the air flotation lifting device (3) to float; when ΔH When < 0, control the three-way control valve (3-4) to switch to the exhaust position to perform a small amount of exhaust and water intake, so that the air flotation lifting device (3) sinks.

9. A large-scale test pool sidewall wave damper capable of air flotation and lifting according to claim 8, characterized in that, The intelligent controller (3-10) has a built-in PID control algorithm, which is based on the deviation. ΔH And its changing trend, dynamically adjust the strength and duration of the control signal, and ultimately make the actual depth H_real Quickly and accurately stabilize at the target depth H_set .

10. A large-scale test pool sidewall wave damper capable of air flotation and lifting according to claim 6, characterized in that, The intelligent control system includes an adaptive depth adjustment function, and the execution steps are as follows: The intelligent controller (3-10) receives operating condition signals characterizing wave conditions, and the operating condition signals may include wave parameters required for the current experiment. The intelligent controller (3-10) has a pre-stored "wave parameter-optimal wave-dissipation depth" mapping table or calculation model, and automatically queries or calculates the optimal target depth based on the operating condition signal. H_optimal ; The intelligent controller (3-10) will H_optimal As a new set value, drive the air flotation lifting device (3) to perform the corresponding floating, sinking or hovering operation to adjust to the optimal target depth.

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