CN117007281A - Laboratory surface wave and multimode internal wave coupling generation device and method - Google Patents
Laboratory surface wave and multimode internal wave coupling generation device and method Download PDFInfo
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- CN117007281A CN117007281A CN202311030649.3A CN202311030649A CN117007281A CN 117007281 A CN117007281 A CN 117007281A CN 202311030649 A CN202311030649 A CN 202311030649A CN 117007281 A CN117007281 A CN 117007281A
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- 230000008878 coupling Effects 0.000 title claims abstract description 30
- 238000010168 coupling process Methods 0.000 title claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 239000011521 glass Substances 0.000 claims abstract description 34
- 230000010355 oscillation Effects 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical group O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 24
- 230000005484 gravity Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention provides a laboratory surface wave and multimode internal wave coupling generating device, which comprises a glass water tank, an automatic lifting table, a wave generator block and a wave-absorbing plate, wherein the glass water tank is connected with the automatic lifting table; the glass water tank is internally filled with water with different densities; the automatic lifting platform is arranged at the upper part of one end of the glass water tank in a matching way; the wave generator is arranged on the automatic lifting table in a matching way and driven by the automatic lifting table to realize lifting; the power output end of the wave generator is provided with the wave generating block in a matching way; the wave-making block is positioned at the inner side of the glass water tank; the wave-absorbing plate is arranged in the other end of the glass water tank in a matching way and forms an included angle of 15-20 degrees with the bottom of the glass water tank. The invention is convenient for changing the wave-making module and combining with changing the oscillation frequency to obtain the surface waves with different wave heights and wavelengths, and can excite the multimode internal wave at the internal interface to realize the coupling generation of the surface waves and the multimode internal wave.
Description
Technical Field
The invention belongs to the technical field of ships and ocean engineering, and particularly relates to a laboratory surface wave and multimode internal wave coupling generation device and method.
Background
Ocean waves and internal waves are common physical phenomena in the ocean, both of which accompany the exchange of energy during propagation. The ocean internal wave is ocean internal wave generated when the layered structure is damaged by external force disturbance in the ocean with a stable layered structure, and is a wave phenomenon almost penetrating through the ocean full depth. And because the interlayer change of the density of the seawater is very small, the gravity is far less than the gravity, and compared with the waves at the free surface, the seawater can generate ocean internal waves with huge amplitude by being slightly disturbed. For underwater vehicles, such internal waves with large amplitude are accompanied by a drastic change in the density surface, and the resulting buoyancy fluctuation can have an important effect on the safe navigation of the vehicle. In addition, in the propagation process of internal waves, in addition to the change of the density surface, reciprocating horizontal flow with strong vertical shearing is generated, so that the safety of the marine structure is threatened, and the marine waves and the internal waves are the two most main loads in the ocean, so that the safety operation of the marine structure is seriously threatened. The research of the method has important significance for the fields of ships and ocean engineering.
The method of generating waves in a laboratory is mainly a mass source driving method, in which waves propagating unidirectionally to the other side of a pool are generated by periodic reciprocating motion of an object such as a push plate, a wave-making block, etc. on one side of the pool. The wave with different wave heights and different frequencies can be realized in the water pool by adjusting the size, the movement period and the like of the mass source. The generation of internal waves requires that two requirements be met, one being a marine structure with a density stabilizing layer and the other being the presence of a source of disturbance. In the laboratory, the current method for generating internal waves mainly uses a so-called gravity collapse method to generate internal solitary waves by means of a pumping plate. The method can realize the generation of solitary waves in different amplitudes by adjusting the height difference (collapse height) of the fluid at the left side and the right side of the pumping plate, but only one mode of internal wave can be generated for a fixed layering condition, so that multi-mode internal waves are difficult to obtain. Meanwhile, the wave or internal wave generation method needs to arrange devices on one side of the pool, the two devices have a competition relationship in space, the two devices are difficult to generate simultaneously, the surface wave and the internal wave are studied in an isolated mode, and the coupling action mechanism of the two devices is unclear.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a laboratory surface wave and multimode internal wave coupling generating device and a method which are convenient for changing a wave making module, combining with changing of an oscillation frequency, obtaining surface waves with different wave heights and wavelengths, exciting multimode internal waves at an internal interface and realizing coupling generation of the surface waves and the multimode internal waves.
In order to solve the technical problems, the invention provides a laboratory surface wave and multimode internal wave coupling generating device which comprises a glass water tank, an automatic lifting table, a wave generator block and a wave absorbing plate; the glass water tank is internally filled with water with different densities; the automatic lifting platform is arranged at the upper part of one end of the glass water tank in a matching way; the wave generator is arranged on the automatic lifting table in a matching way and driven by the automatic lifting table to realize lifting; the power output end of the wave generator is provided with the wave generating block in a matching way; the wave-making block is positioned at the inner side of the glass water tank; the wave-absorbing plate is arranged in the other end of the glass water tank in a matching way and forms an included angle of 15-20 degrees with the bottom of the glass water tank.
The laboratory surface wave and multimode internal wave coupling generating device, wherein: the glass water tank comprises a water tank body and a support column; the water tank body is internally provided with a containing space and is filled with water with different densities; the water tank body is placed on the ground through a plurality of struts which are vertically fixedly arranged on the outer walls of the two ends of the water tank body.
The laboratory surface wave and multimode internal wave coupling generating device, wherein: the automatic lifting platform adopts a scissor type electric lifting platform which is matched with one end of the water tank body and comprises a base, a guide rail, a stepping motor, a transmission mechanism, a lifting frame and a table top; the base is matched and fixed at the upper part of one end of the water tank body; the guide rail is horizontally and fixedly arranged on the upper part of the base in a matching way; the stepping motor is arranged outside one end of the base in a matching way, and the power output end of the stepping motor horizontally extends to the upper part of the base; the transmission mechanism consists of a screw rod and a screw rod seat; one end of the screw rod is fixedly connected with the power output end of the stepping motor in a matching way, and the other end of the screw rod is hinged with a bearing seat in a matching way; the bearing seat is matched and fixed on the base at one side of the stroke end of the guide rail; the screw rod seat is matched and slidably mounted on the guide rail and is connected with the screw rod in a threaded fit manner, and the screw rod seat is driven by the screw rod to linearly displace along the guide rail; the lifting frame comprises a pair of support arms; the middle sections of the pair of support arms are hinged in a matched manner through a hinge shaft; the lower end of one support arm is hinged with the screw rod seat in a matching way, and the lower end of the other support arm is hinged with a support in a matching way; the support is matched and fixed at the upper part of the other end of the base; the table top is horizontally arranged at the upper ends of the pair of support arms in a matching way, the bottom of one end of the table top is hinged with the upper end of one support arm in a matching way, and the bottom of the other end of the table top is hinged with the upper end of the other support arm in a matching way.
The laboratory surface wave and multimode internal wave coupling generating device, wherein: the wave generator is arranged on the table top in a matching way and comprises a servo motor and a crank connecting rod; the servo motor is arranged on the table top, and the power output end of the servo motor is connected with one end of the crank connecting rod in a matching way; the other end of the crank connecting rod vertically stretches into the water tank body downwards.
The laboratory surface wave and multimode internal wave coupling generating device, wherein: the wave-making block is arranged at the end part of the other end of the crank connecting rod in a matching way; the rotation of the servo motor is converted into linear reciprocating motion of the wave-making block through the crank connecting rod; the servo motor can continuously change the wave-making frequency by changing the rotating speed of the servo motor, and the wave-making block oscillation stroke can be realized by changing the length of a connecting rod in the crank connecting rod.
The laboratory surface wave and multimode internal wave coupling generation method is based on the laboratory surface wave and multimode internal wave coupling generation device, and specifically comprises the following steps of:
(1) Configuring upper and lower layers of density layered water according to the size of the glass water tank, and strictly controlling the layer depth ratio;
(2) Adjusting the limit position of the wave-making block according to the size of the glass water tank and the oscillation stroke of the wave-making machine, so that the lowest position of the wave-making block is positioned above the two layers of density water layers, and the highest position of the wave-making block is positioned below the water surface of the upper layer of density water;
(3) Standing until the water surface is stable;
(4) According to the corresponding relation between the wave height and the frequency of the wave generator, the frequency of the wave generator is regulated, and surface waves with specific wave heights and wavelengths are generated;
(5) Observing the junction positions of the upper layer and the lower layer of the dense water layer;
(6) And stopping the wave generator after the two-mode internal wave is generated.
The laboratory surface wave and multimode internal wave coupling generation method comprises the following steps: the upper-layer dense water in the step (1) can be common fresh water with the specific density of 1, and the lower-layer dense water is brine with the specific density of 1.05.
By adopting the technical scheme, the invention has the following beneficial effects:
the laboratory surface wave and multimode internal wave coupling generating device has simple and reasonable structural design and convenient operation, and can realize the coupling generation of surface waves with different wave heights and wavelengths and multimode internal waves by matching the salt water with different densities in the glass water tank, changing the layer depth ratio of the salt water and the pure water, combining an automatic lifting table to efficiently and quantitatively adjust the position of a wave making block and combining a frequency-adjustable wave making machine, thereby reducing the labor cost while improving the wave making precision, and being suitable for popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a laboratory surface wave and multimode internal wave coupling generating device of the present invention;
fig. 2 is a schematic structural diagram of an automatic lifting platform of the laboratory surface wave and multimode internal wave coupling generating device.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further illustrated with reference to specific embodiments.
As shown in fig. 1, the laboratory surface wave and multimode internal wave coupling generating device provided in this embodiment includes a glass water tank 1, an automatic lifting table 2, a wave generator 3, a wave generating block 4 and a wave absorbing plate 5.
The glass water tank 1 comprises a water tank body 11 and a pillar 12; wherein, the water tank body 11 is internally provided with a containing space and is filled with water with different densities; the water tank body 11 is placed on the ground through a plurality of struts 12 which are vertically fixed on the outer walls of the two ends of the water tank body in a matching way.
The automatic lifting table 2 adopts a scissor type electric lifting table which is matched with one end of the water tank body 11 of the glass water tank 1 and comprises a base 21, a guide rail 22, a stepping motor 23, a transmission mechanism 24, a lifting frame 25 and a table top 26. The base 21 is fixed on the upper part of one end of the water tank body 11 of the glass water tank 1 in a matching way; the guide rail 22 is horizontally fixed on the upper part of the base 21 in a matching way; the stepper motor 23 is disposed outside one end of the base 21, and its power output end extends horizontally above the base 21. The transmission mechanism 24 consists of a screw 241 and a screw seat 242; one end of the lead screw 241 is fixedly connected to the power output end of the stepping motor 23 in a matching way, and the other end of the lead screw is hinged with a bearing seat 243 in a matching way; the bearing seat 243 is matched and fixed on the base 21 at one side of the stroke end of the guide rail 22; the screw rod seat 242 is slidably mounted on the guide rail 22 through a sliding block, and is connected with the screw rod 241 through a threaded fit, and the screw rod seat 242 is driven by the screw rod 241 to linearly displace along the guide rail 22. The lifting frame 25 includes a pair of arms 251; the middle sections of the pair of support arms 251 are hinged with each other in a matching way through a hinge shaft 252; the lower end of one support arm 251 is hinged with the screw rod seat 242 of the transmission mechanism 24 in a matching way, and the lower end of the other support arm 251 is hinged with a support 253 in a matching way; the support 253 is matingly fixed to the upper portion of the other end of the base 21 remote from the stepping motor 23. The table 26 is horizontally mounted on the upper ends of the pair of arms 251 in a matching manner, one end bottom of the table is hinged with the upper end of one of the arms 251 in a matching manner, and the other end bottom of the table is hinged with the upper end of the other arm 251 in a matching manner.
The wave generator 3 is arranged on the table top 26 of the automatic lifting table 2 in a matching way and comprises a servo motor 31 and a crank connecting rod 32; the servo motor 31 is arranged on the table top 26 of the automatic lifting table 2, and the power output end of the servo motor is connected with one end of the crank connecting rod 32 in a matching way; the other end of the crank link 32 extends vertically downward into the interior of the trough body 11 of the glass trough 1.
The wave-making block 4 is matched and arranged at the end part of the other end of the crank connecting rod 32 of the wave-making machine 3; the rotation of the servo motor 31 is converted into the linear reciprocating motion of the wave-making block 4 through the crank connecting rod 32, the wave-making frequency can be continuously changed by changing the rotation speed of the servo motor 31, and the oscillating stroke of the wave-making block 4 can be realized by changing the length of the connecting rod in the crank connecting rod 32.
The wave-absorbing plate 5 is arranged in the other end of the water tank body 11 of the glass water tank 1 in an inclined matching way, and forms an included angle of 15-20 degrees with the bottom of the water tank body 11, so that surface waves or internal waves can be eliminated better.
The invention relates to a method for generating coupling of laboratory surface waves and multimode internal waves, which comprises the following specific processes:
(1) Two layers of density layered water are configured according to the size of the glass water tank 1; the upper-layer density water can be common fresh water, the specific density is 1, the lower-layer density water is salt water, and the specific density is 1.05; strictly controlling the layer depth ratio, wherein the layer depth ratio is as follows: 1:4 (upper depth: lower depth), which can be a two-mode internal wave than in the case of the depth ratio; wherein, the layer depth ratio is not fixed and can be adjusted according to the requirement;
(2) The limit position (adjusted by the automatic lifting table 2) of the wave-making block 4 is adjusted according to the size of the glass water tank 1 and the oscillating stroke of the wave-making machine 3, so that the lowest position (lower edge) of the wave-making block 4 is positioned above the two-layer density water layer junction, and the highest position (center) of the wave-making block 4 is positioned below the water surface of the upper-layer density water layer;
(3) After the steps (1) - (2) are adjusted, standing until the water surface is stable;
(4) According to the corresponding relation between the wave height and the frequency of the wave generator 3, the frequency of the wave generator 3 is regulated, and surface waves with specific wave heights and specific wave lengths are generated;
(5) Observing the junction positions of two layers of density water layers;
(6) And stopping the wave generator 3 after the two-mode internal wave is generated.
The invention can realize the coupling generation of surface waves with different wave heights and wavelengths and multimode internal waves, improves the wave-making precision, reduces the labor cost and is suitable for popularization and application.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. A laboratory surface wave and multimode internal wave coupling generating device is characterized in that: the generating device comprises a glass water tank, an automatic lifting table, a wave generator, a wave generating block and a wave absorbing plate;
the glass water tank is internally filled with water with different densities;
the automatic lifting platform is arranged at the upper part of one end of the glass water tank in a matching way;
the wave generator is arranged on the automatic lifting table in a matching way and driven by the automatic lifting table to realize lifting; the power output end of the wave generator is provided with the wave generating block in a matching way; the wave-making block is positioned at the inner side of the glass water tank;
the wave-absorbing plate is arranged in the other end of the glass water tank in a matching way and forms an included angle of 15-20 degrees with the bottom of the glass water tank.
2. The laboratory surface wave and multimode internal wave coupling generating device of claim 1, wherein: the glass water tank comprises a water tank body and a support column; the water tank body is internally provided with a containing space and is filled with water with different densities; the water tank body is placed on the ground through a plurality of struts which are vertically fixedly arranged on the outer walls of the two ends of the water tank body.
3. The laboratory surface wave and multimode internal wave coupling generating device of claim 2, wherein: the automatic lifting platform adopts a scissor type electric lifting platform which is matched with one end of the water tank body and comprises a base, a guide rail, a stepping motor, a transmission mechanism, a lifting frame and a table top;
the base is matched and fixed at the upper part of one end of the water tank body;
the guide rail is horizontally and fixedly arranged on the upper part of the base in a matching way;
the stepping motor is arranged outside one end of the base in a matching way, and the power output end of the stepping motor horizontally extends to the upper part of the base;
the transmission mechanism consists of a screw rod and a screw rod seat; one end of the screw rod is fixedly connected with the power output end of the stepping motor in a matching way, and the other end of the screw rod is hinged with a bearing seat in a matching way; the bearing seat is matched and fixed on the base at one side of the stroke end of the guide rail; the screw rod seat is matched and slidably mounted on the guide rail and is connected with the screw rod in a threaded fit manner, and the screw rod seat is driven by the screw rod to linearly displace along the guide rail;
the lifting frame comprises a pair of support arms; the middle sections of the pair of support arms are hinged in a matched manner through a hinge shaft; the lower end of one support arm is hinged with the screw rod seat in a matching way, and the lower end of the other support arm is hinged with a support in a matching way; the support is matched and fixed at the upper part of the other end of the base;
the table top is horizontally arranged at the upper ends of the pair of support arms in a matching way, the bottom of one end of the table top is hinged with the upper end of one support arm in a matching way, and the bottom of the other end of the table top is hinged with the upper end of the other support arm in a matching way.
4. The laboratory surface wave and multimode internal wave coupling generating device of claim 3, wherein: the wave generator is arranged on the table top in a matching way and comprises a servo motor and a crank connecting rod; the servo motor is arranged on the table top, and the power output end of the servo motor is connected with one end of the crank connecting rod in a matching way; the other end of the crank connecting rod vertically stretches into the water tank body downwards.
5. The laboratory surface wave and multimode internal wave coupling generating device of claim 4, wherein: the wave-making block is arranged at the end part of the other end of the crank connecting rod in a matching way; the rotation of the servo motor is converted into linear reciprocating motion of the wave-making block through the crank connecting rod; the servo motor can continuously change the wave-making frequency by changing the rotating speed of the servo motor, and the wave-making block oscillation stroke can be realized by changing the length of a connecting rod in the crank connecting rod.
6. A method for generating coupling between a laboratory surface wave and a multimode internal wave, based on the device for generating coupling between a laboratory surface wave and a multimode internal wave according to any one of claims 1 to 5, characterized by comprising the following steps:
(1) Configuring upper and lower layers of density layered water according to the size of the glass water tank, and strictly controlling the layer depth ratio;
(2) Adjusting the limit position of the wave-making block according to the size of the glass water tank and the oscillation stroke of the wave-making machine, so that the lowest position of the wave-making block is positioned above the two layers of density water layers, and the highest position of the wave-making block is positioned below the water surface of the upper layer of density water;
(3) Standing until the water surface is stable;
(4) According to the corresponding relation between the wave height and the frequency of the wave generator, the frequency of the wave generator is regulated, and surface waves with specific wave heights and wavelengths are generated;
(5) Observing the junction positions of the upper layer and the lower layer of the dense water layer;
(6) And stopping the wave generator after the two-mode internal wave is generated.
7. The method of generating a laboratory surface wave and multimode internal wave coupling of claim 6, wherein: the upper-layer dense water in the step (1) can be common fresh water with the specific density of 1, and the lower-layer dense water is brine with the specific density of 1.05.
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| CN202311030649.3A CN117007281A (en) | 2023-08-16 | 2023-08-16 | Laboratory surface wave and multimode internal wave coupling generation device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105509995A (en) * | 2015-11-24 | 2016-04-20 | 中山大学 | Vertical-multilayer-control-based internal wave making system and control method thereof |
| CN105758617A (en) * | 2016-03-03 | 2016-07-13 | 中山大学 | Nonlinear and multidirectional irregular wave and internal wave generating system and control method therefor |
| CN112309218A (en) * | 2020-10-16 | 2021-02-02 | 中国矿业大学 | Water tank device for simulating natural generation of internal waves and method thereof |
| CN112697390A (en) * | 2020-11-30 | 2021-04-23 | 中国人民解放军国防科技大学 | Composite first-order and second-order modal internal solitary wave generation device and method suitable for large water tank |
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2023
- 2023-08-16 CN CN202311030649.3A patent/CN117007281A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509995A (en) * | 2015-11-24 | 2016-04-20 | 中山大学 | Vertical-multilayer-control-based internal wave making system and control method thereof |
| CN105758617A (en) * | 2016-03-03 | 2016-07-13 | 中山大学 | Nonlinear and multidirectional irregular wave and internal wave generating system and control method therefor |
| CN112309218A (en) * | 2020-10-16 | 2021-02-02 | 中国矿业大学 | Water tank device for simulating natural generation of internal waves and method thereof |
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