CN215065158U - Experimental device capable of simulating solitary waves in first-order and second-order modes ocean - Google Patents
Experimental device capable of simulating solitary waves in first-order and second-order modes ocean Download PDFInfo
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- CN215065158U CN215065158U CN202022830075.6U CN202022830075U CN215065158U CN 215065158 U CN215065158 U CN 215065158U CN 202022830075 U CN202022830075 U CN 202022830075U CN 215065158 U CN215065158 U CN 215065158U
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Abstract
The utility model discloses an experimental device capable of simulating solitary waves in first-order and second-order modes ocean, which comprises a transparent water tank, wherein liquid is filled in the transparent water tank; the linear guide rails are arranged on two sides of the transparent water tank in the length direction; the louver door linkage control box is installed on the longitudinal moving track, and a linkage control mechanism is arranged in the louver door linkage control box; the longitudinal movement driving mechanism is used for driving the louver door and the louver door linkage control box to move along the linear guide rail; the louver door consists of a plurality of slender thin blades, the partition doors formed by all the blades are arranged in an overlapping mode, the overlapping part has good sealing performance when the louver door is closed, and the blades can synchronously rotate to open and close instantly under the control of the linkage control mechanism and can move up and down along the height direction of the transparent water tank. The utility model discloses can establish the required square potential well of solitary wave in first order and the second order mode, it is little to the water disturbance also to have inherited solitary wave making device in the rotatory shutter door gravity type simultaneously, advantage that the operation is safe convenient.
Description
Technical Field
The utility model discloses an experimental apparatus that can simulate first order and second order modal ocean internal wave especially relates to the device that produces solitary wave in the second order modal in the density layering transparent trough, solitary wave in the density layering ocean that the simulation has certain spring layer thickness in the longer large-scale transparent trough of specially adapted length.
Background
In the ocean, due to the difference of water temperature and salinity, the distribution of seawater density in each depth layer is different, and the interface between fresh water and salt water is easy to be disturbed to generate internal waves. The restoring force of the internal wave is very weak, about 0.1% of the restoring force of the surface wave, the amplitude of the internal wave observed at present reaches hundreds of meters, the restoring force plays an important role in marine ecological regulation, and the restoring force has a non-negligible influence on the safety of marine engineering structures and underwater vehicles. Therefore, the generation evolution of solitary waves in a laboratory simulation and the effect of the solitary waves on the structure are significant.
The experimental devices for generating internal solitary waves at present are roughly divided into two types:
firstly, internal solitary waves are left by disturbing a density layering interface through a mechanical device, such as a rocking plate type wave making method, the requirement on density layering of fluid is high, and the structure for controlling basic elements for generating the internal solitary waves is complex;
and secondly, internal solitary waves are spontaneously generated in a gravity potential well constructing mode, such as a lifting gate type, a rolling gate type, a slot-pulling gate type, a shutter type and the like, wherein the shutter type wave making device has the advantages of small disturbance to a water body, safe and convenient operation, high quality of the generated internal solitary waves and the like.
However, the above two wave-generating devices are limited to the generation of solitons in the first-order mode, and cannot generate solitons in the second-order mode, which is insufficient for the solitons in laboratory research.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is: for overcoming make in the experimental transparent basin of second order modal solitary wave process loaded down with trivial details, the repeatability is poor and make ripples quality wayward etc. not enough in large-scale layering flows, follow the succinct, the convenient principle of operation safety of structure simultaneously, the utility model provides a novel solitary wave makes ripples device in combined type first order, the second order modal. The wave making device improves the structure of the louver door on the basis of the gravity type internal solitary wave making device of the rotary louver door, so that a square potential well required by solitary waves in first-order and second-order modes can be constructed. The combined type internal solitary wave generating device also inherits the advantages of small disturbance to the water body, safe and convenient operation of the gravity type internal solitary wave generating device of the rotary louver door.
The utility model provides a technical scheme that its technical problem adopted is:
an experimental device capable of simulating solitary waves in first-order and second-order modes of ocean comprises:
the transparent water tank is filled with liquid, and the edge of the upper end of the transparent water tank is provided with a linear guide rail along the length direction of the transparent water tank;
the longitudinal movement driving mechanism is used for driving the louver door and the louver door linkage control mechanism to move along the linear guide rail on the transparent water tank;
the louver door linkage mechanism is arranged on the linear guide rail and comprises a louver door and a louver door linkage control mechanism for driving the louver door to be linked, the louver door consists of a plurality of slender thin blades, the blades can synchronously and instantly rotate to open and close under the control of the linkage control mechanism, partition doors formed by all the blades are arranged in an overlapping mode, the overlapping part has sealing performance when the blades are closed, and the bottoms of the blades are rotatably connected with a bottom plate;
the shutter door coordinated control mechanism includes:
the linkage control box is installed on the linear guide rail, and a link rod sliding block, a sliding guide rail, an air cylinder and an air pump are arranged in the linkage control box, wherein each blade is connected with one end of the link rod sliding block corresponding to the linkage block through the linkage block, all the link rod sliding blocks rotate around the corresponding linkage block, the other ends of all the link rod sliding blocks are connected with an air cylinder piston rod, the link rod sliding blocks do reciprocating motion on the sliding guide rail, and when the air cylinder piston drives the piston rod to do reciprocating motion, the link rod sliding blocks are driven to move, so that the link blocks of the blades are driven to rotate by 90 degrees at the same time;
the single blade includes:
the blade comprises a blade body, a first connecting rod, a second connecting rod and a linkage block, wherein the upper end of the blade body is rigidly connected with the bottom end of the first connecting rod, the upper end of the first connecting rod is connected with the linkage block in a sliding manner, and the upper end of the linkage block is connected with the linkage control mechanism in a bolt manner;
the bottom of the blade body is provided with a hollow vertical cavity containing internal threads, and the bottom plate is provided with a circular groove;
the second connecting rod comprises a vertical rod positioned at the upper end and a disc connected to the bottom end of the vertical rod, the disc is movably connected with the circular groove in the bottom plate, and the vertical rod of the second connecting rod comprises an external thread which is in threaded connection with the hollow vertical cavity at the bottom of the blade body;
and the lifting mechanism is used for driving the whole louver door to move up and down along the height direction of the transparent water tank.
One end of the linkage block is provided with a sliding groove which is formed along the axial direction of the linkage block, and the upper end of the first connecting rod extends into the sliding groove and is in sliding connection with the inner wall of the sliding groove through a ball.
The lifting mechanism comprises two shaft rollers with equal diameters arranged at the left end and the right end of the louver door linkage mechanism, the two ends of each shaft roller are connected with the bottom plate through steel wire ropes respectively, and the synchronous lifting of 4 steel wire ropes at the two ends of the bottom plate can be realized by rotating one shaft roller.
And the bottom plate is provided with a lifting hook for connecting a steel wire rope.
The longitudinal movement driving mechanism comprises a ball screw and two worm and gear reducers, wherein the two worm and gear reducers are connected in series, a nut moving pair on the ball screw is fixedly connected with the linkage control box, and the forward and backward movement of the linkage control box is completed by driving the worm and gear by a direction rocking handle or a stepping motor.
The utility model has the advantages that:
the utility model discloses the combined type is first order, wave device is made to solitary wave in second order modal is the experimental facilities who is applicable to in the transparent basin of stratified flow, the first realization can produce the device of solitary wave in the second order modal in the wave mechanism that makes of solitary wave in utilizing the gravity principle of collapsing to produce, adopt closed shutter door and reciprocate in the shutter door system, the lower rivers passageway switching reaches and realizes constructing solitary wave drop condition in first order and the second order modal along transparent basin longitudinal movement regulation water mode, the synchronous quick switching of shutter door passes through the coordinated control system and realizes, combined type is first order, wave device is made to solitary wave in the second order modal is installed on transparent basin edge guide rail, wave machine main part is made along the longitudinal removal of transparent basin through motor and corresponding speed reduction structure control.
The louver door is closed through left and right movement and up and down movement, so that a potential well structure required by solitary waves in first-order and second-order modes is constructed. The wave generator can generate solitary waves in a first-order or second-order mode through the gravity potential well.
The device is less to the water disturbance for the interior solitary wave quality of production is higher, and whole device structure is succinct easy operation simultaneously, and the security obtains effectively improving.
Drawings
FIG. 1 is a schematic structural diagram of an experimental device capable of simulating solitary waves in first-order and second-order modes of ocean according to the present invention;
FIG. 2 is a schematic view of the structure of a single blade of the present invention;
FIG. 3 is an enlarged view of a connection structure between the first link and the linkage block of FIG. 1;
FIG. 4 is a schematic view of the connection structure between the base plate, the second connecting rod and the blade body in FIG. 1;
FIG. 5 is a schematic view of a shutter door lifting mechanism;
FIG. 6 is a side view of FIG. 5;
fig. 7 is a side view of soliton waves in a first-order mode of the present invention.
Fig. 8 is a side view of soliton waves within the second order mode of the present invention.
In the figure, 1, a louver door, 2, a bottom plate, 4, a linkage control box, 5, a link rod sliding block, 6, a cylinder piston, 7, a sliding guide rail, 8, a reversing valve, 9, a worm gear reducer, 10, a ball screw, 11, a linear guide rail, 12, a direction rocking handle, 13, a stepping motor, 14, an air pump, 15, a transparent water tank, 16, a brine layer, 17, a clear water layer, 18, a first steel wire rope, 19, a second steel wire rope, 20, a shaft roller, 21, a lifting hook, 1-1, a linkage block, 1-2, a first connecting rod, 1-3, a blade body, 1-4, a second connecting rod and 1-5 balls are arranged.
Detailed Description
As shown in fig. 1-8, the utility model relates to an experimental device capable of simulating solitary waves in first-order and second-order modal oceans, which comprises:
a transparent water tank 15 filled with liquid, wherein linear guide rails 11 are arranged on two sides of the upper end of the transparent water tank 15 along the length direction of the transparent water tank;
the louver door linkage mechanism is arranged on the linear guide rail 11 and comprises a louver door 1 and a louver door linkage control mechanism for driving the louver door to be linked, the louver door 1 consists of a plurality of slender thin blades, the blades can synchronously and instantly rotate to open and close under the control of the linkage control mechanism, partition doors formed by all the blades are arranged in an overlapping mode, the overlapping part has good sealing performance when the partition doors are closed, and the bottoms of the blades are rotatably connected with a bottom plate 2;
the longitudinal movement driving mechanism is used for driving the louver door and the louver door linkage control mechanism to move along the linear guide rail 11 on the transparent water tank;
the single blade includes:
the blade comprises a blade body 1-3, a first connecting rod 1-2, a second connecting rod 1-4 and a linkage block 1-1, wherein the upper end of the blade body 1-3 is rigidly connected with the bottom end of the first connecting rod 1-2, the upper end of the first connecting rod 1-2 is connected with the linkage block 1-1 in a sliding manner, and the upper end of the linkage block 1-1 is connected with the linkage control mechanism in a bolt manner;
the bottom of the blade body is provided with a hollow vertical cavity containing internal threads, and the bottom plate is provided with a circular groove;
the second connecting rod 1-4 is of a T-shaped rod structure, a cross rod of the T-shaped rod structure is connected with the circular groove in the bottom plate, and a vertical rod of the T-shaped rod structure comprises an external thread and is in threaded connection with a hollow vertical cavity at the bottom of the blade body;
and the lifting mechanism is used for driving the whole louver door to move up and down along the height direction of the transparent water tank.
Furthermore, the lifting mechanism comprises two shaft rollers 20 with the same diameter and arranged at the left end and the right end of the louver door linkage mechanism, the two ends of each shaft roller 20 are respectively connected with the bottom plate 2 through steel wire ropes, and the synchronous lifting of 4 steel wire ropes at the two ends of the bottom plate 2 can be realized by rotating one shaft roller.
Furthermore, a lifting hook 21 for connecting a steel wire rope is arranged on the bottom plate 2.
As shown in fig. 3, a sliding groove formed along the axial direction of the linkage block is formed at one end of the linkage block 1-1, and the upper end of the first connecting rod 1-2 extends into the sliding groove and is in sliding connection with the inner wall of the sliding groove through a ball 1-5.
Further, the shutter door linkage control mechanism includes:
and the linkage control box 4 is installed on the linear guide rail 11, a link rod slide block, a sliding guide rail, an air cylinder and an air pump are arranged in the linkage control box 4, each blade is connected with one end of the link rod slide block corresponding to the linkage block through the linkage block 1-1, the other end of each link rod slide block is connected with an air cylinder piston rod, the link rod slide blocks reciprocate on the sliding guide rail, and when the air cylinder piston drives the piston rod to reciprocate, the link rod slide blocks are driven to move, so that the linkage blocks 1-1 of the blades are driven to rotate by 90 degrees at the same time.
Furthermore, the longitudinal movement driving mechanism comprises a ball screw and two worm and gear reducers 9, wherein the two worm and gear reducers 9 are connected in series, a nut moving pair on the ball screw is fixedly connected with the linkage control box 4, and the forward and backward movement of the linkage control box 4 is completed by driving the worm and gear by a direction rocking handle or a stepping motor.
Utilize the utility model relates to an experimental method that experimental apparatus that can simulate solitary wave in first order and second order mode ocean carries out solitary wave in first order mode, and solitary wave attribute in the first order mode of at first making as required calculates the layering water of wave making machine right side density after required first order mode wave making machine removesThickness h 'of middle and upper layer'10Namely the depth of the potential well and the distance L between the initial position of the wave making machine and the right side of the water tank10I.e., the width of the potential well, and then by the equation
L0h10＝h′10L10 (17)
L0＝L10+x0 (19)
Obtaining the distance L of the initial position of the wave making machine according to the right side of the water tank0And the moving distance x of the wave generator0And finally, actually operating the wave making machine to move to construct a square potential well, and specifically comprising the following steps of:
1) moving the wave generator to an initial position J with the louvre door open0Is located at a distance L from the right side of the water tank0；
2) Starting the linkage control mechanism to close the louver door, lifting the louver door to ensure that the upper end of the louver door is exposed out of the water surface, and reserving an overflow channel between a bottom plate at the bottom of the louver door and the bottom of the transparent water tank;
3) starting the longitudinal movement driving mechanism to move the louver door to the right side of the transparent water tank at a constant speed by a distance x0To position J1Is located at a distance L from the right side of the water tank10Then the required square potential well can be constructed;
4) slowly putting down the shutter door, after the potential well is slightly stable, starting the control device to open the shutter door instantly, and the square potential well collapses under the action of gravity to form the required internal solitary wave.
The experiment of solitary waves in the first-order mode is shown in FIG. 7, h10The thickness of the upper layer in the density layered water body, h20The thickness of the lower layer in the density layered water body, H is the total depth, S is the total length of the transparent water tank, rho10Is the density of the upper water body, rho20Is the density of the lower-layer water body,J0to the initial position of the wave-making machine, J1For moving the rear position of the wave-making machine, x0For the moving distance of wave-making machine, L0According to the distance L on the right side of the water tank at the initial position of the wave generator10According to the distance of the right side of the water tank, namely the width of the potential well, at the final position of the first-order mode wave generator,
the thickness of the upper layer in the density layering water body on the left side of the wave making machine after the movement of the first-order mode wave making machine is the depth of a potential well,
the thickness of the middle and lower layers of the density layered water body at the left side of the wave making machine after the wave making machine moves in a first-order mode h1'0Is the upper layer thickness h 'in the layered water body of the density at the right side of the wave making machine after the movement of the first-order mode wave making machine'20The first-order mode is the thickness of the middle and lower layers of the density layered water body on the right side of the wave making machine after the wave making machine moves.
As shown in fig. 8, similar to the first-order intra-modal soliton implementation step, first, according to the property of the second-order intra-modal soliton to be manufactured, the position offset parameter t and the well depth h in the required cubic well geometric parameters are calculated "2And a potential well width L2By the equation:
(1) the wave making machine moves to I1At the time of position
L-x1＝L1 (1)
Lh1＝L1h′1 (2)
Lh2＝L1h'2 (3)
h1+h2+h3＝H (4)
h′1+h'2+h′3＝H (5)
(2) The wave making machine moves to I2At the time of position
L1-x2＝L2 (9)
L1h′3＝L2h″3 (10)
L1h'2＝L2h″2 (11)
h″1+h″2+h″3＝H (12)
Taking the position offset parameter of the middle jump layer in the square potential well as t, wherein the position offset parameter satisfies the equation:
to obtain L, x1And x2Namely the initial position of the wave maker and the positions of the two movements.
The experiment of solitary waves in the second-order mode is shown in FIG. 8, I0For the initial position of the wave generator, L is the length of the initial position of the wave generator from the right side of the transparent water tank, h1The thickness of the upper layer in the density layered water body, h2In density stratified waterThickness of the intermediate layer h3The thickness of the middle and lower layers of the density layered water body, H is the total depth, and S is the total length of the transparent water tank; rho1Is the density of the upper water body, rho2Is the water density of the middle layer, rho3The density of the middle layer water body; i is1For the first step of the wave-making machine to move the rear position, x1Distance of primary movement of wave-making machine, L1The distance between the position of the wave making machine after the initial movement and the right side of the transparent water tank is long,
the thickness of the upper layer in the density layering water body on the left side of the wave making machine after the wave making machine moves for the first time,
the thickness of the middle layer in the density layering water body on the left side of the wave making machine after the wave making machine moves for the first time,
is the thickness h of the middle layer in the density layering water body at the left side of the wave making machine after the wave making machine is moved for the first time'1Is the upper layer thickness h 'in the wave making machine right side density layered water body after the wave making machine is moved for the first time'2Is the thickness h of the middle layer in the density layering water body at the right side of the wave making machine after the wave making machine is moved for the first time'3The thickness of the middle and lower layers of the density layered water body on the right side of the wave making machine after the wave making machine moves for the first time; i is2For the second step of the wave-making machine, the post-position, x2Distance of primary movement of wave-making machine, L2The length of the position of the wave making machine after moving again from the right side of the transparent water tank is the width of the potential well,
in order to increase the thickness of the upper layer in the density layering water body on the left side of the wave making machine after the wave making machine moves again,
in order to ensure that the thickness of the middle layer in the density layering water body on the left side of the wave making machine is increased after the wave making machine moves again,
the thickness h of the middle layer in the density layering water body at the left side of the wave making machine after the wave making machine moves again1The thickness h of the upper layer in the density layered water body at the right side of the wave making machine after the wave making machine moves again2The thickness of the middle layer in the density layering water body at the right side of the wave making machine after the wave making machine moves again, namely the depth of a potential well h ″3The thickness of the lower layer in the density layered water body on the right side of the wave making machine after the wave making machine moves again, the parameter t is a position offset parameter which is the ratio of the height difference of the density interface between the middle layer on the right side of the wave making machine and the upper layer and the lower layer on the left side of the wave making machine,
finally, actually operating the wave making machine to move to construct a square potential well, and specifically comprising the following steps:
1) moving the wave generator to position I with the louvre door open0At least one of (1) and (b);
2) starting the control device to close the louver door, lifting the louver door to ensure that the upper end of the louver door is exposed out of the water surface, and reserving an overflow channel between a bottom plate at the bottom of the louver door and the bottom of the transparent water tank;
3) the starting control device slowly moves the louver door at a constant speed by a distance x1To position I1After treatment, the louver door is slowly put down, a bottom plate at the bottom of the louver door is contacted with the bottom of the water tank, the bottom overflow channel is closed, and meanwhile, the top of the louver door is ensured to fall below the water surface, and a new overflow channel is formed at the top;
4) the starting control device slowly moves the louver door at a constant speed by a distance x2To position I2Then, the required square potential well can be constructed;
5) after the square potential well is slightly stabilized, the control device is started to instantly open the louver door, and the square potential well collapses under the action of gravity to form a required second-order modal solitary wave.
Claims (5)
1. An experimental device capable of simulating solitary waves in first-order and second-order modes of ocean comprises:
the transparent water tank is filled with liquid, and the edge of the upper end of the transparent water tank is provided with a linear guide rail along the length direction of the transparent water tank;
the longitudinal movement driving mechanism is used for driving the louver door and the louver door linkage control mechanism to move along the linear guide rail on the transparent water tank;
the louver door linkage mechanism is arranged on the linear guide rail and comprises a louver door and a louver door linkage control mechanism for driving the louver door to be linked, the louver door consists of a plurality of slender thin blades, the blades can synchronously and instantly rotate to open and close under the control of the linkage control mechanism, partition doors formed by all the blades are arranged in an overlapping mode, the overlapping part has sealing performance when the blades are closed, and the bottoms of the blades are rotatably connected with a bottom plate;
the shutter door coordinated control mechanism includes:
the linkage control box is installed on the linear guide rail, and a link rod sliding block, a sliding guide rail, an air cylinder and an air pump are arranged in the linkage control box, wherein each blade is connected with one end of the link rod sliding block corresponding to the linkage block through the linkage block, all the link rod sliding blocks rotate around the corresponding linkage block, the other ends of all the link rod sliding blocks are connected with an air cylinder piston rod, the link rod sliding blocks do reciprocating motion on the sliding guide rail, and when the air cylinder piston drives the piston rod to do reciprocating motion, the link rod sliding blocks are driven to move, so that the link blocks of the blades are driven to rotate by 90 degrees at the same time;
characterized in that a single said blade comprises:
the blade comprises a blade body, a first connecting rod, a second connecting rod and a linkage block, wherein the upper end of the blade body is rigidly connected with the bottom end of the first connecting rod, the upper end of the first connecting rod is connected with the linkage block in a sliding manner, and the upper end of the linkage block is connected with the linkage control mechanism in a bolt manner;
the bottom of the blade body is provided with a hollow vertical cavity containing internal threads, and the bottom plate is provided with a circular groove;
the second connecting rod comprises a vertical rod positioned at the upper end and a disc connected to the bottom end of the vertical rod, the disc is movably connected with the circular groove in the bottom plate, and the vertical rod of the second connecting rod comprises an external thread which is in threaded connection with the hollow vertical cavity at the bottom of the blade body;
and the lifting mechanism is used for driving the whole louver door to move up and down along the height direction of the transparent water tank.
2. The experimental device for simulating solitary waves in the sea of first and second order modes according to claim 1, wherein a sliding groove formed along the axial direction of the linkage block is formed in one end of the linkage block, and the upper end of the first connecting rod extends into the sliding groove and is in sliding connection with the inner wall of the sliding groove through a ball.
3. The experimental device capable of simulating solitary waves in the sea in the first-order and second-order modes as claimed in claim 1, wherein the lifting mechanism comprises two shaft rollers with equal diameters arranged at the left end and the right end of the louver door linkage mechanism, two ends of each shaft roller are respectively connected with the bottom plate through steel wire ropes, and synchronous lifting of 4 steel wire ropes at two ends of the bottom plate can be realized by rotation of one shaft roller.
4. The experimental device capable of simulating solitary waves in the sea in the first and second orders of modes according to claim 3, wherein the bottom plate is provided with a lifting hook for connecting a steel wire rope.
5. The experimental device capable of simulating solitary waves in first-order and second-order modes as claimed in claim 1, wherein the longitudinal movement driving mechanism comprises a ball screw and two worm gear reducers, wherein the two worm gear reducers are connected in series, a nut moving pair on the ball screw is fixedly connected with the linkage control box, and the forward and backward movement of the linkage control box is completed by driving the worm gear with a direction rocking handle or a stepping motor.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890080A (en) * | 2024-03-15 | 2024-04-16 | 中国海洋大学 | Method for simulating wave generation of solitary waves in shutter door rotating ocean |
| CN118032276A (en) * | 2024-04-11 | 2024-05-14 | 交通运输部天津水运工程科学研究所 | Experimental device capable of simulating multi-mode ocean internal solitary wave |
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2020
- 2020-11-30 CN CN202022830075.6U patent/CN215065158U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890080A (en) * | 2024-03-15 | 2024-04-16 | 中国海洋大学 | Method for simulating wave generation of solitary waves in shutter door rotating ocean |
| CN117890080B (en) * | 2024-03-15 | 2024-05-28 | 中国海洋大学 | Method for simulating wave generation of solitary waves in shutter door rotating ocean |
| CN118032276A (en) * | 2024-04-11 | 2024-05-14 | 交通运输部天津水运工程科学研究所 | Experimental device capable of simulating multi-mode ocean internal solitary wave |
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