Artificial wave device for wind wave flow wind tunnel test

Abstract

The invention provides an artificial wave device for a wind wave flow wind tunnel test. The artificial wave device comprises a shell, a wave making mechanism, an elastic pavement layer and a matched controller. According to the artificial wave device for the wind wave flow wind tunnel test, the shell is arranged, the wave making mechanism is arranged in the experiment cavity in the shell, and the multiple telescopic parts, evenly distributed in the experiment cavity and capable of extending upwards in the vertical direction, of the wave making mechanism are connected with the elastic pavement layer, so that the elastic pavement layer moves along with the telescopic parts; the matched controller can control all the telescopic parts to drive the elastic pavement layer to move in the vertical direction, so that the elastic pavement layer is in the shape of sea waves.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to an artificial wave device used for wind-wave-current wind tunnel tests. Background Art

[0002] Wind tunnel testing is an experimental method used to study the flow behavior of airflow on the surface of an object. As engineering construction projects gradually move towards the ocean, the development of marine resources will also become a new growth point for the civil engineering industry. The movement of waves will affect the properties of wind, and the coupling phenomenon of wind and waves will make the wind-induced vibration problem of marine construction structures (such as offshore drilling platforms, offshore wind turbines, and cross-sea bridges) more complicated. Reynolds similarity refers to the ratio of the inertial force to the viscous force of two flow systems, that is, their Reynolds numbers are equal. The Reynolds number is a dimensionless number that describes the flow state of a fluid, which reflects the stability and turbulence of the fluid flow. The Froude similarity criterion is an important concept in fluid mechanics, which is mainly used to describe the similarity between flow systems under the action of gravity.

[0003] In the prior art, when conducting a wind tunnel test simulating ocean waves, a water tank is mainly set at the bottom of the wind tunnel, and two methods are mainly used to achieve the test: wave maker to generate waves or wind-generated waves. However, this implementation method is difficult to ensure the waterproof performance of the test equipment, and when using a wave maker to generate waves, the generated water waves will be affected by the wind, and the variables in the test cannot be strictly controlled. In addition, the generated waves often have reflected waves, which affects the test accuracy. When using wind-generated waves, the wind needs to satisfy the Reynolds similarity criterion and the waves need to satisfy the Froude similarity criterion. The two similarity criteria are difficult to directly unify, and the existing wave implementation method affects the test accuracy. Summary of the invention

[0004] The embodiment of the present invention provides an artificial wave device for wind-wave-current wind tunnel test, aiming to solve the problem of poor test accuracy of existing wave realization methods.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide an artificial wave device for wind-wave-current wind tunnel test, comprising: The housing has an experimental cavity with an open top; A wave-making mechanism is arranged in the experimental chamber, the wave-making mechanism has a plurality of telescopic parts that can extend upward in a vertical direction, and the plurality of telescopic parts are evenly distributed in the experimental chamber; An elastic paving layer, corresponding to the opening of the experimental cavity and connected to each of the telescopic parts; A matching controller is used to control each of the telescopic parts to drive the elastic paving layer to move in the vertical direction, so that the elastic paving layer forms a wave shape.

[0006] In a possible implementation, the wave-making mechanism includes: A plurality of telescopic structures are provided, and the plurality of telescopic structures are uniformly distributed in the experimental chamber along the horizontal direction, and each of the telescopic structures has a telescopic end extending vertically upward, and the telescopic end is the telescopic part; There are multiple connecting caps, each of which is fixed on each of the telescopic parts; any two adjacent connecting caps are connected with an elastic connecting rope, and each of the elastic connecting ropes is combined to form a net; The limiting grid is arranged at the open position of the experimental cavity, and the limiting grid is provided with a plurality of passages for the telescopic ends to pass through.

[0007] In a possible implementation, each of the telescopic structures includes: A driver, fixedly mounted at the bottom end of the housing; A spiral rotating rod is vertically arranged, the bottom end of which passes through the bottom end of the housing and is connected to the driver power, and the spiral rotating rod can rotate under the drive of the driver; A telescopic rod, which is sleeved on the spiral rotating rod and threadedly connected with the spiral rotating rod, wherein the outer wall of the telescopic rod abuts against the corresponding opening on the limiting grid, and is used to move the corresponding telescopic rod in the vertical direction when the driver drives the corresponding spiral rotating rod to rotate, and the telescopic rod is the telescopic part; Wherein, a through hole is provided at the bottom end of the shell for the spiral rotating rod to pass through.

[0008] In a possible implementation, each of the telescopic rods includes: A hollow rod body is sleeved on the corresponding spiral rotating rod and is spaced apart from the corresponding spiral rotating rod; The displacement nut is arranged at the bottom end of the hollow rod body and is fixedly connected to the hollow rod body. The displacement nut is sleeved on the corresponding spiral rotating rod and is threadedly connected to the corresponding spiral rotating rod.

[0009] In a possible implementation, the outer wall of each of the hollow rods is a polygonal structure; Wherein, the opening of the limiting grid is a polygonal structure adapted to the outer wall of the hollow rod body.

[0010] In a possible implementation, a limit stopper is provided at the bottom end of each hollow rod, and the limit stopper is used to prevent the hollow rod from being separated from the spiral rotating rod.

[0011] In a possible implementation manner, the driver is a servo motor.

[0012] In the present implementation, compared with the prior art, an outer shell is provided, and a wave-making mechanism is provided in an experimental cavity inside the outer shell. The elastic pavement layer is connected through a plurality of telescopic parts of the wave-making mechanism which are evenly distributed in the experimental cavity and can extend upward in the vertical direction, so that the elastic pavement layer moves with the telescopic parts. The matching controller can control the telescopic parts to drive the elastic pavement layer to move in the vertical direction, so that the elastic pavement layer forms the shape of ocean waves, and the test accuracy is good and the practicability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of an artificial wave device for wind-wave-current wind tunnel testing provided by an embodiment of the present invention; Figure 2 for Figure 1 The enlarged structural schematic diagram of the structural schematic diagram of the artificial wave device used for wind-wave-current wind tunnel test provided is shown at A; Figure 3 for Figure 1 The enlarged structural schematic diagram of the structural schematic diagram B of the artificial wave device provided for wind wave and current wind tunnel test; Figure 4 A schematic diagram of a partial structure of an artificial wave device for wind-wave-current wind tunnel testing provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a telescopic structure of an artificial wave device for wind-wave-current wind tunnel testing provided by an embodiment of the present invention; Description of reference numerals: 10. Shell; 20. Wave-making mechanism; 21. Telescopic structure; 211. Driver; 212. Screw-rotating rod; 213. Telescopic rod; 2131. Hollow rod body; 2132. Displacement nut; 2133. Limit block; 22. Connecting cap; 23. Elastic connecting rope; 24. Limiting grille; 30. Elastic paving layer; 40. Matching controller. DETAILED DESCRIPTION

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] Please also read Figures 1 to 5Now, the artificial wave device for wind-wave-current wind tunnel test provided by the present invention is described. The artificial wave device for wind-wave-current wind tunnel test comprises a shell 10, a wave-making mechanism 20, an elastic pavement layer 30 and a matching controller 40. The shell 10 has an experimental cavity with an open top. The wave-making mechanism 20 is arranged in the experimental cavity, and the wave-making mechanism 20 has a plurality of telescopic parts that can extend upward in the vertical direction, and the plurality of telescopic parts are evenly distributed in the experimental cavity. The elastic pavement layer 30 corresponds to the opening of the experimental cavity and is connected to each telescopic part. The matching controller 40 is used to control each telescopic part to drive the elastic pavement layer 30 to move in the vertical direction, so that the elastic pavement layer 30 forms the shape of a wave.

[0016] Compared with the prior art, the artificial wave device for wind-wave-current wind tunnel test provided in the present embodiment is provided with a shell 10, and a wave-making mechanism 20 is provided in the experimental cavity inside the shell 10. The wave-making mechanism 20 is connected to an elastic pavement layer 30 through a plurality of telescopic parts evenly distributed in the experimental cavity and extending upward in the vertical direction, so that the elastic pavement layer 30 moves with the telescopic parts. The matching controller 40 can control the telescopic parts to drive the elastic pavement layer 30 to move in the vertical direction, so that the elastic pavement layer 30 forms the shape of waves, and the test accuracy is good and the practicability is good.

[0017] In some embodiments, the wave-making mechanism 20 may be implemented as follows: Figure 4 See the structure shown. Figure 4 The wave-making mechanism 20 includes: a telescopic structure 21, a connecting cap 22 and a limiting grid 24. There are multiple telescopic structures 21, and the multiple telescopic structures 21 are evenly distributed in the experimental chamber along the horizontal direction. Each telescopic structure 21 has a telescopic end extending vertically upward, and the telescopic end is a telescopic part. There are multiple connecting caps 22, and each connecting cap 22 is fixed on each telescopic part one by one. Any two adjacent connecting caps 22 are connected with an elastic connecting rope 23, and each elastic connecting rope 23 is combined to form a mesh. The limiting grid 24 is set at the open end of the experimental chamber, and the limiting grid 24 is provided with a plurality of openings for each telescopic end to pass through.

[0018] The telescopic structure 21 can be an electric push rod, which is an electric drive device that converts the rotational motion of the motor into the linear reciprocating motion of the push rod. The electric push rod is a prior art and will not be described in detail here. The connecting caps 22 can be fixed on each telescopic part one by one, and the elastic connecting rope 23 can connect any two adjacent connecting caps 22. When the telescopic structure 21 is arranged in a matrix, the elastic connecting rope 23 obliquely connects the corresponding connecting caps 22. The limiting grid 24 can pass through multiple openings for each telescopic end to pass through.

[0019] In some embodiments, the telescopic structure 21 may be configured as follows: Figure 3 , Figure 4 See the structure shown. Figure 3 , Figure 4 Each telescopic structure 21 includes: a driver 211, a spiral rotating rod 212 and a telescopic rod 213. The driver 211 is fixed at the bottom end of the housing 10. The spiral rotating rod 212 is vertically arranged, and the bottom end of the spiral rotating rod 212 passes through the bottom end of the housing 10 and is connected to the driver 211. The spiral rotating rod 212 can rotate under the drive of the driver 211. The telescopic rod 213 is sleeved on the spiral rotating rod 212 and is threadedly connected to the spiral rotating rod 212. The outer wall of the telescopic rod 213 abuts against the corresponding opening on the limiting grid 24, so that when the driver 211 drives the corresponding spiral rotating rod 212 to rotate, the corresponding telescopic rod 213 moves in the vertical direction. The telescopic rod 213 is a telescopic part.

[0020] The bottom end of the housing 10 is provided with a through hole for the spiral rotating rod 212 to pass through.

[0021] The driver 211 may be fixedly mounted at the bottom end of the housing 10. The spiral rotating rod 212 may penetrate the bottom end of the housing 10 and be dynamically connected to the driver 211, and the spiral rotating rod 212 may rotate under the driving of the driver 211. The telescopic rod 213 may be sleeved on the spiral rotating rod 212 and threadedly connected to the spiral rotating rod 212, so that when the driver 211 drives the corresponding spiral rotating rod 212 to rotate, the corresponding telescopic rod 213 may move in the vertical direction.

[0022] In some embodiments, the telescopic rod 213 may be Figure 4 , Figure 5 See the structure shown. Figure 4 , Figure 5 Each telescopic rod 213 includes: a hollow rod body 2131 and a displacement nut 2132. The hollow rod body 2131 is sleeved on the corresponding spiral rotating rod 212 and is spaced apart from the corresponding spiral rotating rod 212. The displacement nut 2132 is disposed at the bottom end of the hollow rod body 2131 and is fixedly connected to the hollow rod body 2131. The displacement nut 2132 is sleeved on the corresponding spiral rotating rod 212 and is threadedly connected to the corresponding spiral rotating rod 212.

[0023] The hollow rod body 2131 can be sleeved on the corresponding spiral rotating rod 212 and spaced apart from the corresponding spiral rotating rod 212. The displacement nut 2132 can be set at the bottom end of the hollow rod body 2131 and threadedly connected to the corresponding spiral rotating rod 212, so as to drive the hollow rod body 2131 to move when the spiral rotating rod 212 rotates.

[0024] In some embodiments, the hollow rod 2131 may be formed as follows: Figure 2 , Figure 4 , Figure 5 See the structure shown. Figure 2 , Figure 4 , Figure 5 The outer wall of each hollow rod 2131 is a polygonal structure.

[0025] The opening of the limiting grid 24 is a polygonal structure adapted to the outer wall of the hollow rod body 2131 .

[0026] The outer wall of the hollow rod body 2131 is a polygonal structure, which can be adapted to the polygonal structure of the opening of the limiting grid 24 , thereby preventing the hollow rod body 2131 from rotating with the spiral rotating rod 212 .

[0027] A preferred embodiment is that the cross section of the hollow rod 2131 can be Figure 4 Schematic rectangular structure.

[0028] In some embodiments, the hollow rod 2131 may be formed as follows: Figure 5 See the structure shown. Figure 5 A limit stopper 2133 is disposed at the bottom end of each hollow rod body 2131 , and the limit stopper 2133 is used to prevent the hollow rod body 2131 from escaping from the spiral rotating rod 212 .

[0029] The limit stopper 2133 can prevent the hollow rod body 2131 from being separated from the spiral rotating rod 212 .

[0030] In some embodiments, the driver 211 may be implemented as follows: Figure 3 , Figure 4 See the structure shown. Figure 3 , Figure 4 , the driver 211 is a servo motor.

[0031] A servo motor is an electric motor that precisely controls mechanical displacement, speed, and torque. It is an auxiliary motor indirect speed change device that can precisely control physical quantities such as the position, speed, and acceleration of the output shaft according to the instructions of the input signal. The servo motor is an existing technology and will not be elaborated on here.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An artificial wave device for wind-wave-current wind tunnel test, characterized in that: include: The housing has an experimental cavity with an open top; A wave-making mechanism is arranged in the experimental chamber, the wave-making mechanism has a plurality of telescopic parts that can extend upward in a vertical direction, and the plurality of telescopic parts are evenly distributed in the experimental chamber; An elastic paving layer, corresponding to the opening of the experimental cavity and connected to each of the telescopic parts; A matching controller is used to control each of the telescopic parts to drive the elastic paving layer to move in the vertical direction, so that the elastic paving layer forms a wave shape.

2. The artificial wave device for wind-wave-current wind tunnel test according to claim 1, characterized in that: The wave-making mechanism comprises: A plurality of telescopic structures are provided, and the plurality of telescopic structures are uniformly distributed in the experimental chamber along the horizontal direction, and each of the telescopic structures has a telescopic end extending vertically upward, and the telescopic end is the telescopic part; There are multiple connecting caps, each of which is fixed on each of the telescopic parts; any two adjacent connecting caps are connected with an elastic connecting rope, and each of the elastic connecting ropes is combined to form a net; The limiting grid is arranged at the open position of the experimental cavity, and the limiting grid is provided with a plurality of passages for the telescopic ends to pass through.

3. The artificial wave device for wind-wave-current wind tunnel test according to claim 2, characterized in that: Each of the telescopic structures comprises: A driver, fixedly mounted at the bottom end of the housing; A spiral rotating rod is vertically arranged, the bottom end of which passes through the bottom end of the housing and is connected to the driver power, and the spiral rotating rod can rotate under the drive of the driver; A telescopic rod, which is sleeved on the spiral rotating rod and threadedly connected with the spiral rotating rod, wherein the outer wall of the telescopic rod abuts against the corresponding opening on the limiting grid, and is used to move the corresponding telescopic rod in the vertical direction when the driver drives the corresponding spiral rotating rod to rotate, and the telescopic rod is the telescopic part; Wherein, a through hole is provided at the bottom end of the shell for the spiral rotating rod to pass through.

4. The artificial wave device for wind-wave-current wind tunnel test according to claim 3, characterized in that: Each of the telescopic rods comprises: A hollow rod body is sleeved on the corresponding spiral rotating rod and is spaced apart from the corresponding spiral rotating rod; The displacement nut is arranged at the bottom end of the hollow rod body and is fixedly connected to the hollow rod body. The displacement nut is sleeved on the corresponding spiral rotating rod and is threadedly connected to the corresponding spiral rotating rod.

5. The artificial wave device for wind-wave-current wind tunnel test according to claim 4, characterized in that: The outer wall of each hollow rod is a polygonal structure; Wherein, the opening of the limiting grid is a polygonal structure adapted to the outer wall of the hollow rod body.

6. The artificial wave device for wind-wave-current wind tunnel test according to claim 4, characterized in that: A limit stopper is provided at the bottom end of each hollow rod body, and the limit stopper is used to prevent the hollow rod body from escaping from the spiral rotating rod.

7. The artificial wave device for wind-wave-current wind tunnel test according to claim 3, characterized in that: The driver is a servo motor.

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