Wind and wave simulation method for coastal engineering water tank test

Abstract

The invention discloses a wind and wave simulation method for a coastal engineering water tank test, the method is realized through a water tank wind generation device and a wave maker, and the water tank wind generation device and the wave maker are arranged at two opposite ends of a water tank along the length direction; according to test requirements, the walking trolley is moved to enable the fan assembly to move in the length direction of the water tank, the telescopic piece is driven to act to enable the fan assembly to move in the height direction of the water tank, and therefore the wind speed and the wind quantity are simulated at different positions in the water tank. According to the invention, the wind generating machine can move along the height direction of the water tank through the multi-stage telescopic cylinder and can be flexibly adjusted along the height direction, so that the wind generating requirements of different test water depths can be ensured; in addition, the whole fan can move in the length direction of the water tank through the walking trolley, and the wind generation requirements of different test positions can be met.

Description

Technical Field

[0001] The invention relates to the technical field of nearshore engineering, and in particular to a method for simulating wind and waves for nearshore engineering water tank tests. Background Art

[0002] In the field of nearshore engineering such as ships and ports, wind is an important environmental factor. More and more engineering tests need to consider wind speed, so wind-generating systems are often used in ship models and hydraulic tests. At present, the wind-generating method of the water tank wind-generating system is mostly fixed. When the test water level is low, the wind-passing area above the water surface is larger, and the wind-generating efficiency is lower; when the test location is far from the wind-generating system, the wind speed is affected by the loss along the way, and the wind-generating efficiency is also low.

[0003] Therefore, it is urgent to propose a method for generating wind and waves that can meet the needs of nearshore projects such as ships and ports. This method can be used for flume tests at different water depths and different locations to generate wind and waves, and has efficient wind and wave generation capabilities. Summary of the invention

[0004] In order to solve the deficiencies of the above technical solutions, the object of the present invention is to provide a method for simulating wind and waves for nearshore engineering flume tests.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] A method for simulating wind and waves for a flume test of a nearshore project, the method being implemented by a flume wind-generating device and a wave-generating machine, the flume wind-generating device and the wave-generating machine being placed at opposite ends of the flume along the length direction;

[0007] The water tank wind-generating device comprises a traveling trolley, a telescopic member, a fan assembly and a counterweight assembly. The traveling trolley is used to be slidably mounted on the wall of the water tank to achieve movement along the length direction of the water tank. The telescopic member is mounted on one side of the traveling trolley by bolts. The counterweight assembly is mounted on the other side of the traveling trolley to maintain the balance of the device. The fan assembly is installed at the bottom of the telescopic member to achieve movement along the height direction of the water tank.

[0008] The method for simulating wind and waves includes the following steps:

[0009] Step 1, storing water in the water tank until the water volume required for the test is reached;

[0010] Step 2: Turn on the wave maker and fan assembly to simulate the wind speed, wind volume and waves in the tidal current, collect various data on wave height, flow velocity and water level in the water tank, and at the same time, according to the test requirements, move the walking trolley to move the fan assembly along the length direction of the water tank, and drive the telescopic part to move the fan assembly along the height direction of the water tank to simulate wind speed and wind volume at different positions in the water tank.

[0011] In the above technical solution, a plurality of telescopic members are provided according to the width of the water tank, and the telescopic members are linked to each other to move the fan assembly along the height direction of the water tank.

[0012] In the above technical solution, the depth of the water in the water tank is 0.4-1.2m.

[0013] In the above technical solution, a track is laid on the top of each trough wall of the water trough, and the traveling trolley is slidably installed on the track, and the track is a hot-rolled steel rail.

[0014] In the above technical solution, the walking trolley includes a first truss and double-sided driving wheels and boundless driven wheels installed at the bottom of the first truss. The first truss is slidably installed on the track through the double-sided driving wheels and the boundless driven wheels. The double-sided driving wheels are arranged on opposite sides of the bottom of the first truss in pairs through shaft connection. The boundless driven wheels are arranged on opposite sides of the bottom of the first truss in pairs through shaft connection. The double-sided driving wheels are connected to the servo motor, and the walking trolley is driven to move by the servo motor.

[0015] In the above technical solution, a fan frame is installed at the bottom of the telescopic member, and a fan assembly is installed at the bottom of the fan frame.

[0016] In the above technical solution, the fan frame is a second truss made of stainless steel, with a width equal to the width of the water tank, the top is connected to the telescopic member by bolts, and the fan assembly is inverted at the bottom of the fan frame by bolts.

[0017] In the above technical solution, the fan assembly includes a fan and a rubber shock absorber. Each fan is installed at the bottom of the fan frame through four mounting seats, and a rubber shock absorber is installed on each mounting seat.

[0018] In the above technical solution, the counterweight assembly includes a counterweight box and a counterweight block. Each counterweight box is installed on the first truss, and the counterweight block is installed in the counterweight box. The mass of the counterweight block is equal to the total mass of the telescopic part, the fan frame and the fan assembly to prevent the walking trolley from tipping over during movement.

[0019] In the above technical solution, the telescopic member is a multi-stage telescopic cylinder.

[0020] The advantages and beneficial effects of the present invention are:

[0021] 1. The present invention realizes the movement of the fan along the height direction of the water tank through a multi-stage telescopic cylinder, and can be flexibly adjusted along the height direction to meet the wind-making needs of different test water depths; in addition, the fan is moved along the length direction of the water tank as a whole through a walking trolley to meet the wind-making needs of different test positions.

[0022] 2. The present invention can ensure that the power of the wind fan will be reduced under the condition of the same wind-generating performance by moving the wind fan, thereby reducing the purchase cost of the wind fan; secondly, the mobile wind fan adopts an automated method, which reduces the workload of manually lifting the wind fan and making temporary wind tunnels, saves labor costs, and shortens the test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view of the device of the present invention (including the water tank).

[0024] Figure 2 It is a rear view of the device of the present invention (including the water tank).

[0025] Figure 3 It is a schematic diagram of the overall structure of the device of the present invention (excluding the water tank).

[0026] Among them, 1: track, 2: walking trolley, 2.1: first truss, 2.2: double-sided driving wheel, 2.3: borderless driven wheel, 3: telescopic part, 4: fan frame, 5: fan assembly, 5.1: fan, 5.2: mounting seat, 6: counterweight assembly, 7: water tank. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0028] like Figure 1-Figure 3 As shown, a method for simulating wind and waves for a flume test of a nearshore project is provided, wherein the method realizes the simulation by a flume wind-generating device and a wave-generating machine, wherein the flume wind-generating device and the wave-generating machine are placed at opposite ends of the flume along the length direction;

[0029] The water trough wind-making device comprises a track 1, a trolley 2, a telescopic part 3 (a multi-stage telescopic cylinder in the present embodiment), a fan frame 4, a fan assembly 5 and a counterweight assembly 6. The track 1 is laid along the length direction of the water trough 7 on the top of its trough wall. The trolley 2 is slidably installed on the track 1 (a hot-rolled steel rail in the present embodiment, model: YB222-63) across the water trough 7 to achieve movement along the length direction of the water trough 7. The telescopic part 3 is installed on one side of the trolley 2 by bolts, and the counterweight assembly 6 is installed on the other side of the trolley 2 to maintain the balance of the device. The fan assembly 5 is installed on the bottom of the telescopic part 3 through the fan frame 4 to achieve movement along the height direction of the water trough 7. The telescopic part 3 is arranged in plurality according to the width of the water trough 7, and each telescopic part 3 is linked to move the fan assembly 5 along the height direction of the water trough 7.

[0030] The walking trolley 2 includes a first truss 2.1 and two double-sided driving wheels 2.2 and two boundless driven wheels 2.3 installed at the bottom of the first truss 2.1. The first truss 2.1 is slidably installed on the track 1 through the double-sided driving wheels 2.2 and the boundless driven wheels 2.3 to ensure that the walking trolley does not derail during movement and to avoid jamming during movement of the walking trolley. The two double-sided driving wheels 2.2 are arranged on opposite sides of the bottom of the first truss 2.1 through an axis connection, and the two boundless driven wheels 2.3 are arranged on opposite sides of the bottom of the first truss 2.1 through an axis connection. The double-sided driving wheels 2.2 are connected to a servo motor, and the walking trolley 2 is driven to move by the servo motor.

[0031] The fan frame 4 is a second truss, made of stainless steel, with a width equal to the width of the water tank 7. The top is connected to the telescopic member 3 by bolts. The fan assembly 5 is inverted at the bottom of the fan frame 4 by bolts. The fan assembly 5 includes four wind generators 5.1 and rubber shock absorbers. Each wind generator 5.1 is installed on the connecting plate at the bottom of the fan frame 4 through four mounting seats 5.2. A rubber shock absorber is installed on each mounting seat 5.2 to reduce the vibration caused by the wind generator when it is working.

[0032] The counterweight assembly 6 includes multiple counterweight boxes and counterweight blocks, each of which is installed on the first truss 2.1 of the walking trolley 2, and the counterweight block is installed in the counterweight box. The mass of the counterweight block is equal to the total mass of the telescopic part 3, the fan frame 4 and the fan assembly 5 to prevent the walking trolley 2 from tipping over during movement.

[0033] The method for simulating wind and waves comprises the following steps:

[0034] Step 1, storing water in the water tank until the water volume required for the test is reached;

[0035] Step 2: Turn on the wave maker and fan assembly to simulate the wind speed, wind volume and waves in the tidal current, collect various data on wave height, flow velocity and water level in the water tank, and at the same time, according to the test requirements, move the walking trolley to move the fan assembly along the length direction of the water tank, and drive the telescopic part to move the fan assembly along the height direction of the water tank to simulate wind speed and wind volume at different positions in the water tank.

[0036] In this embodiment, the water tank 7 has a length of 98 m, a width of 4 m, and a height of 2 m, a test water depth of 0.4 m-1.2 m, a maximum wave height of 0.5 m, and a maximum wind speed of 25 m / s.

[0037] Compared with the traditional technology, the wind speed is about 22.7m / s at a distance of 20m from the fan outlet, about 18.3m / s at a distance of 30m from the fan outlet, and about 15.4m / s at a distance of 50m from the fan outlet. The farther from the fan outlet, the lower the wind speed. The effective moving distance of the device in this embodiment along the length direction of the water tank is 70m, the moving distance in the height direction is 0.6m, and the wind-generating range of the wind speed of 25m / s covers the entire steel structure section of the test water tank. The method of this embodiment has a significant advantage of efficient wind generation.

[0038] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0039] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0040] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A method for simulating wind and waves for offshore engineering flume tests, characterized in that: The method is implemented by a water tank wind-generating device and a wave-generating machine, wherein the water tank wind-generating device and the wave-generating machine are placed at opposite ends of the water tank along the length direction; The water tank wind-generating device comprises a traveling trolley, a telescopic member, a fan assembly and a counterweight assembly, wherein the traveling trolley is used for sliding installation on the wall of the water tank to achieve movement along the length direction of the water tank, the telescopic member is installed on one side surface of the traveling trolley, the counterweight assembly is installed on the other side surface of the traveling trolley, and the fan assembly is installed at the bottom of the telescopic member to achieve movement along the height direction of the water tank; The method for simulating wind and waves includes the following steps: Step 1, storing water in the water tank until the water volume required for the test is reached; Step 2: Turn on the wave maker and fan assembly to simulate the wind speed, wind volume and waves in the tidal current, collect various data on wave height, flow velocity and water level in the water tank, and at the same time, according to the test requirements, move the walking trolley to move the fan assembly along the length direction of the water tank, and drive the telescopic part to move the fan assembly along the height direction of the water tank to simulate wind speed and wind volume at different positions in the water tank.

2. The method according to claim 1, characterized in that The telescopic parts are arranged in plurality according to the width of the water tank, and the telescopic parts are linked to each other.

3. The method according to claim 1, characterized in that The depth of the water in the water tank is 0.4-1.2m.

4. The method according to claim 1, characterized in that: A track is laid on the top of each tank wall of the water tank, and the traveling trolley is slidably installed on the track.

5. The method according to claim 1, characterized in that The walking trolley includes a first truss and double-sided driving wheels and boundless driven wheels installed at the bottom of the first truss. The first truss is slidably installed on the track through the double-sided driving wheels and the boundless driven wheels. The double-sided driving wheels are arranged on opposite sides of the bottom of the first truss in pairs through shaft connection. The boundless driven wheels are arranged on opposite sides of the bottom of the first truss in pairs through shaft connection. The double-sided driving wheels are connected to a servo motor, and the walking trolley is driven to move by the servo motor.

6. The method according to claim 5, characterized in that A fan frame is installed at the bottom of the telescopic member, and a fan assembly is installed at the bottom of the fan frame.

7. The method according to claim 6, characterized in that The fan frame is a second truss made of stainless steel, with a width equal to the width of the water tank, and the top is connected to the telescopic member by bolts, and the fan assembly is inverted at the bottom of the fan frame by bolts.

8. The method according to claim 7, characterized in that The fan assembly includes a fan and a rubber shock absorber. Each fan is installed at the bottom of the fan frame through four mounting seats, and a rubber shock absorber is installed on each mounting seat.

9. The method according to claim 8, characterized in that The counterweight assembly includes a counterweight box and a counterweight block. Each counterweight box is installed on the first truss, and the counterweight block is installed in the counterweight box. The mass of the counterweight block is equal to the total mass of the telescopic part, the fan frame and the fan assembly to prevent the walking trolley from tipping over during movement.

10. The method according to claim 1, characterized in that The telescopic member is a multi-stage telescopic cylinder.

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