Test pool for suppressing low-frequency oscillation

Abstract

The invention discloses a test pool for suppressing low-frequency oscillation. The test pool comprises a pool main body, a wave maker and a wave absorbing beach, the wave maker is arranged in the pool main body and is used for making waves in the pool main body; the pool main body comprises a shoal area; the wave absorbing beach is placed in the shoal area and right faces the wave maker. The wave absorbing beach is of a non-solid structure with pores; a solid back plate is arranged on one side, back to the wave maker, of the wave absorbing beach; the solid back plate covers the side surface of the wave absorbing beach; a lifting plate is arranged at the bottom of the pool body; the placing position of the wave absorbing beach can be changed in the direction close to or away from the wave maker, so that the distance between the wave maker and the wave absorbing beach is changed; the lifting plate can ascend and descend to change the depth of the pool body. In the scheme, the solid back plate on the back side of the wave absorbing beach can play a role in blocking waves, so that the length of the pool main body can be adjusted by moving the position of the wave absorbing beach, the natural oscillation period of the pool main body is further adjusted, and the interference of the natural oscillation period of the pool on a test is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wave-absorption experimental devices, and in particular to a test water pool for suppressing low-frequency oscillations. Background Art

[0002] A test pool is a laboratory-based marine environment simulation device that can generate wind, waves, and currents by controlling parameters such as water flow and wind force, thereby simulating the real marine environment and its impact on islands, floating structures, and the like. For example, in the field of island development, a test pool can be used to simulate marine dynamic environments such as waves, tides, storm surges, and nearshore currents, thereby testing the stability of island shoreline protection structures (such as breakwaters) under different wave conditions. For another example, in the field of floating structure natural vibration period research, a test pool can be used to cause floating structures to generate multi-degree-of-freedom responses such as heave, roll, and pitch under free or forced vibration, thereby measuring the floating structure's inherent natural vibration period. At the same time, by adjusting parameters such as wave period and flow velocity, the coupling relationship between the structure's natural vibration period and the external excitation period can be simulated to verify whether there is a risk of resonance. In addition, the test pool can specifically test the impact of different structural designs (such as the column spacing of semi-submersible platforms, the aspect ratio of ship structures, and the liquid tank layout of LNG floating tanks) on the natural vibration characteristics, thereby providing data support for optimizing parameters such as structural stiffness, center of gravity position, and draft depth, ultimately ensuring the vibration safety and stability of the structure in complex marine environments in actual applications.

[0003] In practical applications, a test tank acts as a closed or semi-closed water system. After external disturbances (such as wave generation and model motion) disappear, the water generates a natural period of free oscillation due to inertia, boundary reflections, and other effects. The magnitude of this period is primarily related to the tank's geometric parameters (length, width, and water depth). When the floating structure's natural oscillation period approaches the tank's natural oscillation period, the water and structural vibrations reinforce each other, generating a false resonance. This causes the vibration amplification effect observed in the test to be confounded by the tank's boundary constraints, making it impossible to reflect the structure's inherent characteristics in a real marine environment.

[0004] In order to reduce the interference of the natural oscillation period of the water pool on the test, the existing test water pool has restrictions on the size of the floating structure to ensure that the water pool size is much larger than the scale of the floating structure, which makes the applicability of the test water pool low. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a test water pool that suppresses low-frequency oscillations, so as to improve the applicability of the test water pool and reduce the interference of the natural oscillation period of the water pool on the test.

[0006] In order to achieve the above technical objectives, the present application provides a test water pool for suppressing low-frequency oscillations, comprising: a water pool body, a wave generator and a wave-breaking beach;

[0007] The wave maker is arranged in the water pool body and is used to generate waves in the water pool body;

[0008] The main body of the pool includes a shallow area;

[0009] The wave-breaking beach is placed in the shallow area and directly faces the wave maker;

[0010] The wave-breaking beach is a non-solid structure with pores;

[0011] A solid backboard is provided on the side of the wave-breaking beach facing away from the wave maker;

[0012] The solid backboard covers the side surfaces of the wave-breaking beach;

[0013] A lifting plate is provided at the bottom of the pool body;

[0014] The wave-breaking beach can be changed in position in a direction close to or away from the wave-making machine to change the distance from the wave-making machine to the wave-breaking beach;

[0015] The lifting plate can be raised and lowered to change the depth of the pool body.

[0016] Furthermore, the solid backboard covers the top surface of the wave-breaking beach.

[0017] Furthermore, both sides of the wave-breaking beach along the length direction abut against the inner wall of the pool body.

[0018] Furthermore, the pool body includes a deep water area;

[0019] The lifting plate is arranged in the deep water area;

[0020] The wave-breaking beach can be placed at the edge of the shallow area close to the deep water area to separate the deep water area from the shallow area.

[0021] Furthermore, a slope is provided in the main body of the pool;

[0022] The slope is arranged between the shallow area and the deep water area, and the slope connects the bottom of the shallow area and the bottom of the deep water area.

[0023] Furthermore, the slope has a gradient of 30° to 60°.

[0024] Furthermore, a damping member is included;

[0025] The damping member is placed in the shallow area and is located between the wave-breaking beach and the wave maker.

[0026] Further, the height of the damping member is less than the water depth of the shoal area.

[0027] Further, the damping member comprises a plurality of.

[0028] Further, the plurality of damping members can be arranged in a side-by-side state, a submerged state or an exposed state.

[0029] In the side-by-side state, the plurality of damping members are laid side by side along the width direction of the wave dissipation shoal.

[0030] In the submerged state, the plurality of damping members are stacked along the vertical direction, and the stacking height of the plurality of damping members is less than the water depth of the shoal area.

[0031] In the exposed state, the plurality of damping members are stacked along the vertical direction, and the stacking height of the plurality of damping members is greater than the water depth of the shoal area.

[0032] Further, the damping member is internally hollowed into a damping net structure.

[0033] Further, the length of the damping member is 4-6m.

[0034] The width of the damping member is 1-2m.

[0035] The height of the damping member is 0.3-0.5m.

[0036] As can be seen from the above technical solutions, the application provides a test pool for suppressing low-frequency oscillation, comprising: a pool body, a wave maker and a wave dissipation shoal; the wave maker is arranged in the pool body and is used for generating waves in the pool body; the pool body comprises a shoal area; the wave dissipation shoal is placed in the shoal area and faces the wave maker; the wave dissipation shoal is a non-solid structure with pores; a solid back plate is arranged on the side of the wave dissipation shoal opposite to the wave maker; the solid back plate covers the side surface of the wave dissipation shoal; a lifting plate is arranged at the bottom of the pool body; the wave dissipation shoal can change the placement position in the direction of approaching or moving away from the wave maker, so as to change the distance between the wave maker and the wave dissipation shoal; the lifting plate can be lifted to change the depth of the pool body.

[0037] In the present scheme, the solid back plate on the back side of the wave dissipation shoal can block the waves, so that the length of the pool body can be adjusted by moving the position of the wave dissipation shoal, and then the natural oscillation period of the pool body is adjusted to avoid the natural vibration period of the test structure or to verify the stability of the data through multiple comparison tests, thereby improving the accuracy of the test and reducing the interference of the natural oscillation period of the pool on the test. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A side view of a test water pool for suppressing low-frequency oscillations provided in an embodiment of the present application;

[0040] Figure 2 A top view of a test water pool for suppressing low-frequency oscillations provided in an embodiment of the present application;

[0041] Figure 3 A side view of a test pool for suppressing low-frequency oscillations provided in an embodiment of the present application, wherein the wave-breaking beach is moved to the edge of the shallows area;

[0042] Figure 4 A side view of a sloped test pool for suppressing low-frequency oscillations provided in an embodiment of the present application;

[0043] Figure 5 A side view of a test water pool provided with a damping member for suppressing low-frequency oscillations according to an embodiment of the present application;

[0044] Figure 6 A schematic diagram of damping elements of a test water pool for suppressing low-frequency oscillations provided by an embodiment of the present application when in a side-by-side state;

[0045] Figure 7 A schematic diagram of a damping member of a test water pool for suppressing low-frequency oscillations provided by an embodiment of the present application in a stacked state;

[0046] Figure 8 Time-frequency diagrams of two groups of waves generated in the test pool provided in an embodiment of the present application without using a damping element;

[0047] Figure 9 This is a frequency superposition diagram of two groups of waves generated in the test pool provided in an embodiment of the present application without using a damping element;

[0048] Figure 10 Time-frequency diagram of two groups of waves generated when a test water pool for suppressing low-frequency oscillations provided by an embodiment of the present application is configured with a damping member;

[0049] Figure 11 This is a frequency superposition diagram of two groups of waves generated when a test water pool for suppressing low-frequency oscillations provided in an embodiment of the present application is equipped with a damping member;

[0050] In the figure: 10, pool body; 11, shallow area; 12, deep water area; 13, lifting plate; 14, slope; 20, wave maker; 30, wave absorbing beach; 31, solid back plate; 40, damping member. DETAILED DESCRIPTION

[0051] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0052] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] Please refer to Figure 1 With Figure 2 The test pool for suppressing low-frequency oscillation provided in the embodiments of the present application comprises a pool body 10, a wave maker 20 and a wave absorbing beach 30.

[0055] The wave maker 20 is arranged in the pool body 10 and is used to generate waves in the pool body 10. In application, the wave maker 20 can be a rocking plate wave maker or a push plate wave maker. The pool body 10 comprises a shallow area 11. The wave absorbing beach 30 is placed in the shallow area 11 and faces the wave maker 20. In order to facilitate the description, in the embodiments of the present application, the pool body 10 is configured as a rectangular structure in the top view. In the horizontal direction, the length side of the pool body 10 is the first direction, and the width side is the second direction. The first direction and the second direction are perpendicular to each other, and respectively as Figure 2The X-axis and Y-axis directions are shown in FIG. In this embodiment, the wave generator 20 and the wave-breaking beach 30 are respectively disposed on both sides of the pool body 10 along the first direction. In this embodiment, the side of the wave-breaking beach 30 facing the wave generator 20 is the front side of the wave-breaking beach 30; correspondingly, the side of the wave-breaking beach 30 facing away from the wave generator 20 is the rear side of the wave-breaking beach 30.

[0056] The wave-breaking beach 30 is a porous, non-solid structure that mimics the gently sloping beaches found in nature. This allows waves that contact the beach to gradually break up and dissipate energy during propagation, reducing wave reflection or impact. A solid backboard 31 is provided on the side of the beach 30 facing away from the wave generator 20. This means that the solid backboard 31 is provided on the rear side of the beach 30 and covers the rear side of the beach 30. A lifting plate 13 is provided at the bottom of the pool body 10. The beach 30 can be repositioned toward or away from the wave generator 20 to change the distance from the wave generator 20 to the beach 30. The lifting plate 13 can be raised and lowered to change the depth of the pool body 10.

[0057] As an embodiment, only a shallow area 11 may be provided in the pool body 10 to simulate a shallow water environment and reproduce the wave action in the nearshore and shallow areas.

[0058] As an embodiment, the wave-breaking beach 30 may be a trapezoidal structure, specifically a right-angled trapezoid, and the rear side surface of the wave-breaking beach 30 is the right-angled side of the trapezoid.

[0059] In this embodiment, the front end of the breakwater 30 attenuates incident wave energy and, through its non-solid structure, prevents waves from experiencing strong reflections due to sudden obstructions. The solid backboard 31 at the rear end of the breakwater 30 forms a closed boundary, preventing waves from passing through the breakwater 30. Therefore, the solid backboard 31 in this embodiment functions as a pool boundary.

[0060] In actual applications, the natural vibration period of floating structures such as semi-submersible platforms, ship-type structures, and LNG pontoons has a wide distribution range, which is about 25-125s. When these structures are placed in a test pool to carry out physical model tests, the natural vibration period ranges from about 5-40s. When the natural vibration period of the floating structure is close to the oscillation period of the pool, the above-mentioned false resonance response will be generated, resulting in test failure. In this embodiment, the staff can change the length of the pool body 10 along the first direction by moving the wave-breaking beach 30, thereby changing the natural oscillation frequency of the pool body 10, so as to avoid the key frequency of the test, avoid resonance and interference, or conduct multiple groups of comparative tests after changing the size of the pool to verify the stability of the data, thereby reducing the impact of the natural oscillation frequency on the test.

[0061] At the same time, the lifting plate 13 provided in the pool body 10 of this embodiment can change the depth of the pool body 10, thereby changing the oscillation period of the pool body 10 by changing the pool depth. This, in conjunction with the movement of the wave-breaking beach 30, increases the adjustment range of the oscillation period of the pool body 10, thereby improving the applicability of the pool. The method of calculating the pool oscillation period by combining parameters such as the wave-generating frequency after changing the depth of the pool body 10 and moving the wave-breaking beach 30 is conventional technology and is not described in detail in this embodiment.

[0062] In summary, in the test pool for suppressing low-frequency oscillations provided in this embodiment, the wave-breaking beach 30 can not only continuously exert its wave-breaking function through the porous structure at the front end, but also serve as the pool boundary through the solid backboard 31 provided at the back. Therefore, the effective length of the pool can be directly changed by moving the placement of the wave-breaking beach 30. In conjunction with the lifting plate 13, the test pool provided in this embodiment realizes the combination of wave-breaking function and length / depth adjustment function, realizing dynamic adjustment of the pool geometric parameters through simple operation. Moreover, for small models or high-frequency tests, the utilization rate of the pool space can be improved by shortening the pool length.

[0063] As an embodiment, the wave-breaking beach 30 and the wave maker 20 may also be respectively arranged on both sides of the pool body 10 along the second direction.

[0064] As an embodiment, in order to ensure the energy dissipation effect of the wave-breaking beach 30 on waves and the boundary effect of the solid backboard 31 , both sides of the wave-breaking beach 30 along the length direction abut against the inner wall of the pool body 10 .

[0065] In one embodiment, the solid back plate 31 also covers the top surface of the wave-breaking beach 30 .

[0066] Specifically, in use, the top surface of the wave-breaking beach 30 is exposed above the water surface of the shallow area 11. The back and top surfaces of the solid backboard 31 both cover the wave-breaking beach 30, which can enhance the overall rigidity of the wave-breaking beach 30, improve the wave-breaking efficiency, and ensure the adjustment accuracy of the effective length of the pool.

[0067] In one embodiment, see Figures 1 to 3 The pool body 10 includes a deep water area 12; the lifting plate 13 is arranged in the deep water area 12; the wave-breaking beach 30 can be placed at the edge of the shallow area 11 close to the deep water area 12 to separate the deep water area 12 and the shallow area 11.

[0068] In this embodiment, the shoal area 11 is of fixed depth. The deep water area 12 can be adjusted in depth by the position of the lifting plate 13 to adapt to different test conditions. Specifically, the lifting plate 13 can be raised to be flush with the shoal area 11, at which time the pool main body 10 forms a structure of an entire shoal area. The lifting plate 13 can also be lowered to form a height difference with the shoal area 11, so that the deep water area 12 and the shoal area 11 form a difference in water level depth, to simulate the depth variation of the coast from deep to shallow, and to adjust the depth difference between the deep water area 12 and the shoal area 11 by the lifting plate 13.

[0069] In this embodiment, the wave-breaking beach 30 can also be moved to the edge of the shoal area 11, as shown in Figure 3 Due to the boundary isolation effect of the solid back plate 31 on the wave-breaking beach 30, the deep water area 12 and the shoal area 11 are separated, so that the pool can be used for separate tests in deep water and shallow water environments.

[0070] It should be noted that in actual applications, the way to move the wave-breaking beach 30 to the placement position can be, for example, by a traction device on the bank of the pool, which belongs to the prior art, and therefore will not be described in this embodiment.

[0071] In one embodiment, referring to Figure 4 , a slope 14 is arranged in the pool main body 10; the slope 14 is arranged between the shoal area 11 and the deep water area 12, and the slope 14 connects the bottom of the shoal area 11 and the bottom of the deep water area 12.

[0072] In applications, the slope 14 can have a slope of 30° to 60° to avoid excessive occupation of the use area of the deep water area 12 by the slope 14.

[0073] In applications, the slope 14 can be configured to be flush with the shoal area 11 when the lifting plate 13 is lowered to the bottommost position, to achieve a gentle transition. As an embodiment, the slope 14 is a triangular columnar block that can be disassembled and transferred.

[0074] By arranging the slope 14, the discontinuous surface at the transition position of the deep water area 12 and the shoal area 11 can be eliminated to prevent the quality of the waves from being reduced, and the risk of uncontrollable waves can be reduced.

[0075] In one embodiment, referring to Figure 5 , a damping member 40 is further included; the damping member 40 is placed in the shoal area 11 and located between the wave-breaking beach 30 and the wave maker 20.

[0076] The damping member 40 arranged in the shoal area 11 can consume the energy of water body oscillation in a frictional and energy dissipating manner to improve the stability of the waves and inhibit the occurrence of wave reflection and low-frequency oscillation waves in the pool.

[0077] As an embodiment, the interior of the damping member 40 is a hollow energy dissipation mesh structure, so that when waves pass through, the mesh pores can dissipate the kinetic energy of the waves by causing friction, turbulence, diversion and pressure changes in the waves.

[0078] In one embodiment, the height of the damping member 40 is less than the water depth of the shallow area 11 .

[0079] Specifically, as an embodiment, the damping members 40 include multiple members, each of which may be 4-6 meters long, 1-2 meters wide, and 0.3-0.5 meters high. Furthermore, in actual use, personnel may arrange the length of the damping members 40 as needed; for example, the damping members 40 may be arranged along the second direction to abut the inner wall of the pool body 10.

[0080] In this embodiment, because the height of the damping elements 40 is less than the water depth of the shallow area 11, when the damping elements 40 are arranged in a single layer, the damping elements 40 can be completely submerged below the water surface. This allows the damping elements 40 to be configured so as not to contact the water surface, thereby reducing wave reflections caused by waves colliding with the structural surface of the damping elements 40 while not affecting the entry of wave energy into the damping area.

[0081] In one embodiment, the plurality of damping members 40 can be arranged in a side-by-side state, a submerged state, or an exposed state; in the side-by-side state, the plurality of damping members 40 are laid side by side along the width direction of the wave-breaking beach 30; in the submerged state, the plurality of damping members 40 are stacked in a vertical direction, and the stacking height of the plurality of damping members 40 is less than the water depth of the shallow area 11; in the exposed state, the plurality of damping members 40 are stacked in a vertical direction, and the stacking height of the plurality of damping members 40 is greater than the water depth of the shallow area 11.

[0082] Specifically, in the side-by-side state, a plurality of damping members 40 are arranged along a first direction, such as Figure 6 Arranging the damping elements 40 in multiple rows in parallel can achieve multi-level energy dissipation of waves, break the regular propagation path of reflected waves, improve energy dissipation efficiency, and reduce the risk of turbulent areas forming behind the damping elements 40.

[0083] In the submerged state, the damping members 40 are arranged in a multi-layer structure and are still located below the water surface, such as Figure 7 Because wave energy in water is not evenly distributed but exhibits a specific attenuation pattern with depth, arranging the damping elements 40 in multiple layers can specifically consume wave energy in each layer and allow personnel to adjust the number of damping elements 40 layers according to experimental conditions, enhancing adaptability to different test conditions.

[0084] In the exposed state, damping element 40 also has a multi-layer structure and extends above the water surface of shallow area 11. In this state, it is possible to conduct targeted tests on wave energy transfer and interference in the water surface and near-surface areas, broaden the wave absorption frequency, and test the ability to control complex wave phenomena.

[0085] It should be noted that, among the above states, different states can be superimposed on each other, for example, multiple damping members 40 are arranged in a side-by-side state and an exposed state at the same time.

[0086] In practical applications, see Figure 8 Without the damping element 40, the wave heights of two groups of waves were recorded and analyzed over a period of 0 to 650 seconds. The specific process was to generate the first group of waves for 300 seconds (0 to 300 seconds), then pause for 50 seconds, and then generate the second group of waves for 300 seconds (350 to 650 seconds) under the same conditions. In this case, the wave height data continuously observed from 0 to 650 seconds at the center of the deep water area 12 is shown in the figure below. Figure 8 As shown in the figure, the frequency spectrum of the first group (0 to 300s) and the second group (350 to 650s) of wave height observation data were analyzed respectively, and the frequency-spectrum superposition diagram of the two groups of waves was obtained as shown in the figure. Figure 9 shown. Figure 9 The solid line in the figure represents the spectrum of the first wave group, and the dashed line represents the spectrum of the second wave group. As can be seen from the figure, the difference in spectral area between the first and second wave groups is 7.3%. The frequency difference between the two wave groups is large, and the wave stability is low. This means that the wave field formed at this time is low-stability and prone to oscillation effects.

[0087] See also Figure 10 , in the case where the damping element 40 is installed and the damping element 40 is in a submerged state, the wave heights of the two groups of waves are recorded and the spectrum is analyzed in the time from 0 to 650s. The working conditions and duration of the two groups of waves are the same as those mentioned above. Figure 8 The same situation is the same as in the previous example. After the first set of 300s (0 to 300s) waves are generated, a 50s pause is performed, and then the second set of 300s (350 to 650s) waves are generated under the same working conditions. In this case, the wave height data of 0-650s continuously observed at the center of deep water area 12 is shown in the figure below. Figure 10 As shown in the figure, the frequency spectrum of the first group (0 to 300s) and the second group (350 to 650s) of wave height observation data were analyzed respectively, and the frequency-spectrum superposition diagram of the two groups of waves was obtained as shown in the figure. Figure 11 As shown in the figure, the solid line represents the spectrum of the first wave group, and the dashed line represents the spectrum of the second wave group. As can be seen from the figure, the area difference between the first and second wave groups is 1.52%, indicating that the frequency difference between the two wave groups is small and the waves are highly stable, which means that the wave field formed at this time is a high-quality wave field that can suppress oscillation effects.

[0088] Therefore, through the above experimental comparison, it can be seen that in the embodiments provided in the present application, the provision of damping elements can effectively improve the wave-making performance of the test water pool and improve the wave-making stability.

[0089] The above are only preferred embodiments of the present application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the aforementioned examples or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A test water pool for suppressing low-frequency oscillations, characterized in that: include: A water pool body (10), a wave generator (20), a wave-breaking beach (30) and a damping member (40); The wave maker (20) is arranged on the water pool body (10) and is used to generate waves in the water pool body (10); The pool body (10) includes a shallow area (11); The wave-breaking beach (30) is placed in the shallow area (11) and directly faces the wave maker (20); A solid back plate (31) is provided on the side of the wave-breaking beach (30) facing away from the wave maker (20); The solid backboard (31) covers the side of the wave-breaking beach (30); A lifting plate (13) is provided at the bottom of the pool body (10); The wave-breaking beach (30) can be changed in placement along a direction close to or away from the wave-making machine (20) to change the distance between the wave-making machine (20) and the wave-breaking beach (30); The lifting plate (13) can be raised and lowered to change the depth of the pool body (10); The damping member (40) is placed in the shallow area (11) and is located between the wave-breaking beach (30) and the wave maker (20); The height of the damping member (40) is less than the water depth of the shallow area (11); The damping members (40) include a plurality of damping members (40), and the plurality of damping members (40) can be arranged in a side-by-side state, a submerged state, or an exposed state; In the side-by-side state, the plurality of damping members (40) are laid side by side along the width direction of the wave-breaking beach (30); In the submerged state, the plurality of damping members (40) are stacked in a vertical direction, and the stacking height of the plurality of damping members (40) is less than the water depth of the shallow area (11); In the exposed state, the plurality of damping members (40) are stacked in a vertical direction, and the stacking height of the plurality of damping members (40) is greater than the water depth of the shallow area (11).

2. The test water pool for suppressing low-frequency oscillation according to claim 1, characterized in that: The solid backboard (31) covers the top surface of the wave-breaking beach (30).

3. The test water pool for suppressing low-frequency oscillation according to claim 1, characterized in that: Both sides of the wave-breaking beach (30) along the length direction abut against the inner wall of the pool body (10).

4. The test water pool for suppressing low-frequency oscillation according to claim 1, characterized in that: The pool body (10) includes a deep water area (12); The lifting plate (13) is arranged in the deep water area (12); The wave-breaking beach (30) can be placed at the edge of the shallow area (11) close to the deep water area (12) to separate the deep water area (12) from the shallow area (11).

5. The test water pool for suppressing low-frequency oscillation according to claim 4, characterized in that: A slope (14) is provided in the pool body (10); The slope (14) is arranged between the shallow area (11) and the deep water area (12), and the slope (14) connects the bottom of the shallow area (11) and the bottom of the deep water area (12).

6. The test water pool for suppressing low-frequency oscillation according to claim 5, characterized in that: The slope (14) has a gradient of 30° to 60°.

7. The test water pool for suppressing low-frequency oscillation according to claim 5, characterized in that: The slope (14) is a detachable triangular columnar block.

8. The test water pool for suppressing low-frequency oscillation according to claim 1, characterized in that: The wave-breaking beach (30) is a non-solid structure with pores.

9. The test water pool for suppressing low-frequency oscillation according to claim 1, characterized in that: The interior of the damping member (40) is a hollow energy dissipation net structure.

10. The test water pool for suppressing low-frequency oscillation according to claim 1, characterized in that: The length of the damping member (40) is 4-6 m; The width of the damping member (40) is 1-2 m; The height of the damping member (40) is 0.3-0.5 m.

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