CN107782528B - Wind tunnel test research device and method for cable crane tank swinging under influence of strong wind - Google Patents
Wind tunnel test research device and method for cable crane tank swinging under influence of strong wind Download PDFInfo
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- CN107782528B CN107782528B CN201711156721.1A CN201711156721A CN107782528B CN 107782528 B CN107782528 B CN 107782528B CN 201711156721 A CN201711156721 A CN 201711156721A CN 107782528 B CN107782528 B CN 107782528B
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- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a wind tunnel test research device and method for cable crane tank swinging under the influence of strong wind, which comprises a wind simulation device for simulating a strong wind environment, wherein the wind simulation device is arranged on the side surface of a swinging device, and the swinging device is used for simulating the cable crane tank and is matched with the wind simulation device to simulate the swinging condition of the cable crane tank at different wind speed grades; the swing device is matched with a test recording instrument for recording simulation test results, and the test recording instrument records the test results. The device can simulate the swing condition of the cable crane suspension tank under the condition of strong wind, and further provides data support for subsequent research.
Description
Technical Field
The invention belongs to the field of cable crane construction research, and particularly relates to a wind tunnel test device and method for researching swing of a cable crane tank under the influence of strong wind.
Background
The cable machine is used as a main concrete transportation and pouring machine in the construction of arch dams in mountain canyon areas, and has the characteristics of one-time construction and benefit in the whole construction period. According to the self-structure analysis, the flexible cable of the cable crane is a main component in the transportation process of the suspension tank, and the length of the cable can reach hundreds of meters by considering the pouring height of the cable crane; moreover, considering the construction environment of the cable crane, the cable crane suspension tank moves back and forth between the feeding platform and the dam body, and conflicts with construction machinery and personnel in the dam pouring bin easily occur; in addition, the cable crane is arranged on two banks of a river and is subjected to the action of a load along the river, and the cable crane can swing to a larger extent, so that the construction safety of the cable crane is not good.
For some high mountain canyon regions like southwest of China, the wind power along the valley direction can reach nine grades, and the time of reaching seven grades of wind in the whole year accounts for a relatively long time, so that the phenomenon that the cable crane can swing greatly in the strong wind environment is worth paying attention. However, natural wind is a random excitation, and the wind speed changes randomly within a certain range under a certain fixed wind level condition, so that the real characteristic of the swing of the suspension tank cannot be reflected by using a mechanical model for approximate calculation.
Therefore, a model test method is adopted to manufacture a cable crane structural model, and the swing process of the cable crane tank is recorded under the artificial strong wind environment, so that the wind tunnel test device for researching the swing rule of the cable crane tank under the action of strong wind is formed.
Disclosure of Invention
The invention discloses a wind tunnel test device and a wind tunnel test method for cable crane tank swing research under the influence of strong wind, which can simulate the cable crane tank swing condition under the condition of strong wind, and further provide data support for subsequent research.
In order to achieve the technical characteristics, the invention aims to realize that: a wind tunnel test research device for cable crane bucket swinging under the influence of strong wind comprises a wind simulation device for simulating a strong wind environment, wherein the wind simulation device is arranged on the side surface of a swinging device, and the swinging device is used for simulating the cable crane bucket and is matched with the wind simulation device to simulate the swinging condition of the cable crane bucket under different wind speed grades; the swing device is matched with a test recording instrument for recording simulation test results, and the test recording instrument records the test results.
The wind analogue means includes bellows support, bellows are installed at bellows support's top, bellows internally mounted has the many grades of fans of interchange, bellows comprise gradual change section, branch hole section and flat section, are provided with anemorumbometer in the air outlet position of bellows, anemorumbometer installs on the anemorumbometer support.
The gradual change section internally mounted has the net of straining wind, divide the inside porous wind channel of rectangle that is provided with of hole section.
The swinging device comprises a swinging support, a cross rod is installed on the top support of the swinging support, a cross beam is installed between the cross rods, a swinging rope is hoisted in the middle of the cross beam, one end of the swinging rope is connected with a hoisting tank, the other end of the swinging rope bypasses a swinging rope guide hole and is connected with a manual reel, and the swinging rope guide hole is fixedly installed at the bottom of the cross rod.
The suspension tank is made of light aluminum alloy, the surface of the suspension tank is coated with fluorescent paint, and the suspension tank is in a cylindrical shape, and weights with certain mass are contained in the suspension tank.
The swing support is supported by four liftable tripods, and every liftable tripod supports all to contain multisection telescopic link, all marks two length size from last to down and from supreme down on every section telescopic link.
The test recording instrument is formed by combining an angle identification plate component and a high-definition camera, and the high-definition camera and the angle identification plate component are oppositely arranged and are perpendicular to the wind speed direction.
The high-definition camera is fixedly installed on the camera support.
The angle identification plate assembly comprises an angle identification plate, the angle identification plate is fixedly mounted on an angle identification plate frame body, the angle identification plate frame body is supported and mounted on a telescopic chute, the telescopic chute is mounted on an angle identification plate tripod, an angle identification line is arranged on the angle identification plate, and the angle identification line is matched with an angle scale mark to indicate an angle value; the angle scale lines are marked by fluorescent paint, and are distinguished by different colors in the positive and negative directions;
the initial position of the swing rope is overlapped with the angle marking line of the angle marking plate component.
The test method of the wind tunnel test research device for the swing of the cable crane bucket under the influence of any strong wind comprises the following steps:
step1: installing the swing device, installing a wind simulation device on the side surface of the swing device, erecting an anemorumbometer, installing a test recording instrument on the other side surface of the swing device, and installing a high-definition camera on the opposite surface of the test recording instrument;
step2: a swinging rope is arranged on the swinging device, and the other end of the swinging rope is connected with a manual reel;
step3: adjusting the heights of the swing bracket, the angle identification plate tripod and the swing rope, and ensuring that the cycloid is coincided with an angle identification line on the angle identification plate;
step4: placing a weight with proper weight in the suspension tank according to the test requirement;
step5: starting a wind simulation device, adjusting the wind speed of an alternating-current multi-gear fan, and blowing the suspension tank;
step6: recording the swing angle change conditions of the swing rope and the swing tank in the swing process through a high-definition camera;
step7: and performing post-processing on the video recorded by the high-definition camera, and analyzing the data.
The invention has the following beneficial effects:
1. by adopting the wind tunnel test research device, the swing condition of the cable crane suspension tank under the condition of strong wind can be simulated, and data support is further provided for follow-up research.
2. Through wind analogue means's bellows connect gradually by the gradual change section, the branch hole section, the straight section that the cross-section is the square and form, wherein, the gradual change section will exchange the wind that many grades of fans produced and assemble and smoothly introduce the branch hole section, because the branch hole section adds consequently wind can be by evenly distributed, through the guide of straight section at last, the speed fluctuation of wind is further by steady. The straight section comprises a plurality of sections, and the straight section is increased or decreased according to needs in the test, so that the simulated wind meets the natural wind characteristic that the wind speed fluctuates in a certain range at a certain wind level after geometric scaling of the model test.
3. The wind filtering net is made of square-hole gauze with equal aperture, the size of the wind filtering net can be just installed on the gradual change section of the wind box, and in the test process, the regulation and control of the wind speed and the wind level are realized by increasing and decreasing the number of layers of the gauze according to the number indication of the anemorumbometer and the gear of the fan at each time.
4. Through the fluorescent paint, the swing process of the suspension tank can be clearly recorded under the darkroom environment, and the swing angle of the suspension tank at each moment can be obtained by referring to the scales on the angle marking plate in the later-stage video processing.
5. The swing process of the tank crane can be clearly recorded through the high-definition camera in a darkroom environment, and the swing angle of the tank crane at each moment can be obtained by referring to the scales on the angle identification plate in later-stage video processing.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the structure of a straight section of the windbox of the present invention.
FIG. 3 is a schematic view of the structure of a branched segment of the windbox of the present invention.
FIG. 4 is a schematic view of the transition section structure of the windbox of the present invention.
Fig. 5 is a schematic structural diagram of an ac multi-stage fan according to the present invention.
In the figure: the wind box comprises a wind box 1, a gradual change section 2, a hole division section 3, a straight section 4, an alternating-current multi-gear fan 5, a wind box support 6, a swing support 7, a swing rope guide hole 8, a cross rod 9, a cross beam 10, a swing rope 11, a suspension tank 12, a manual reel 13, a camera support 14, a high-definition camera 15, a wind direction indicator support 16, a wind speed and direction indicator 17, an angle identification plate tripod 18, angle scale lines 19, a telescopic chute 20, angle identification lines 21, an angle identification plate 22 and an angle identification plate frame body 23.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
as shown in fig. 1 to 5, a wind tunnel test research device for cable crane tank swing under the influence of strong wind comprises a wind simulation device for simulating a strong wind environment, wherein the wind simulation device is arranged on the side surface of a swing device, and the swing device is used for simulating the cable crane tank and is matched with the wind simulation device to simulate the swing condition of the cable crane tank at different wind speed grades; the swing device is matched with a test recording instrument for recording simulation test results, and the test recording instrument records the test results.
Further, wind analogue means includes bellows support 6, bellows 1 is installed at bellows support 6's top, 1 internally mounted of bellows has the many grades of fans of interchange 5, bellows 1 comprises gradual change section 2, branch hole section 3 and flat section 4, is provided with anemorumbometer 17 in the air outlet position of bellows 1, anemorumbometer 17 installs on anemorumbometer support 16. The transition section 2, the hole distribution section 3 and the straight section 4 are connected in sequence, wherein the transition section 2 is connected with an air outlet of the fan, the air blown out by the fan can be gathered and smoothly transited, the hole distribution section 3 can equally distribute the air into a shape like a Chinese character 'jing' on a spatial section, and finally the hole distribution section is connected with the straight section 4 with the length capable of being increased and decreased.
Furthermore, the gradual change section 2 internally mounted has the net 23 of straining wind, the inside porous wind channel of rectangle that is provided with of branch pore section 3. The air filtering net 23 is composed of a frame and a square hole gauze, and the size of the air filtering net is just consistent with the inner diameter of the transition section, so that the air filtering net can be tightly installed on the transition section. The regulation and control of the wind speed and the wind level are realized by increasing and decreasing the number of layers of the wind filtering net 23 according to the indication number of the anemorumbometer and the gear of the fan.
Furthermore, the bellows is formed by connecting gradually the gradual change section, the branch hole section, the straight section that the cross-section is the square in proper order, and wherein, the gradual change section will exchange the wind that many grades of fans produced and assemble and smoothly introduce the branch hole section, because the branch hole section has increased vertical and horizontal baffle consequently wind can by evenly distributed, and through the guide of straight section at last, the speed fluctuation of wind is further by steady. The straight section comprises a plurality of sections, and the straight section is increased or decreased according to needs in the test, so that the simulated wind meets the natural wind characteristic that the wind speed fluctuates in a certain range at a certain wind level after geometric scaling of the model test.
Further, pendulous device includes swing bracket 7, swing bracket 7's top is supported and is installed horizontal pole 9, install crossbeam 10 between the horizontal pole 9, the middle part hoist and mount of crossbeam 10 have pendulum rope 11, the one end of pendulum rope 11 is connected with cage 12, and the other end walks around pendulum rope bullport 8 to link to each other with manual reel 13, pendulum rope bullport 8 fixed mounting is in the bottom of horizontal pole 9. The swing rope 11 is made of a constantan wire, and the length of the swing rope can be adjusted through a manual reel 13.
Further, the suspension tank 12 is made of light aluminum alloy, the surface of which is coated with fluorescent paint, and the suspension tank is in a cylindrical shape and internally contains a certain mass of weights. The swing process of the suspension tank can be clearly recorded under the darkroom environment through the fluorescent paint, and the swing angle of the suspension tank at each moment can be obtained by referring to the scales on the angle marking plate in the later-stage video processing.
Furthermore, the swing bracket 7 is supported by four liftable tripods, each liftable tripod support comprises a plurality of telescopic rods, and each telescopic rod is marked with two length dimensions from top to bottom and from bottom to top. So that the length of the cycloid can be read from the top to bottom dimension and the height of the tank can be read from the bottom to top dimension.
Furthermore, the test recording instrument is formed by combining an angle identification plate component and a high-definition camera 15, and the high-definition camera 15 and the angle identification plate component are oppositely arranged and are perpendicular to the wind speed direction.
Further, the high-definition camera 15 is fixedly mounted on the camera support 14. The swing process of the tank crane can be clearly recorded through the high-definition camera 15 in a darkroom environment, and the swing angle of the tank crane at each moment can be obtained by referring to the scales on the angle identification plate in later-stage video processing.
Further, the angle identification plate assembly comprises an angle identification plate 22, the angle identification plate 22 is fixedly installed on an angle identification plate frame body 23, the angle identification plate frame body 23 is supported and installed on a telescopic chute 20, the telescopic chute 20 is installed on an angle identification plate tripod 18, an angle identification line 21 is arranged on the angle identification plate 22, and the angle identification line 21 is matched with an angle scale mark 19 to indicate an angle value; the angle scale lines 19 are marked by fluorescent paint, and are distinguished by different colors in the positive and negative directions.
Furthermore, the angle scales on the identification plate are coated with fluorescent paint, and the positive direction and the negative direction of the swing angle are subjected to color distinguishing to emit light with different colors in a darkroom environment. Therefore, the swing angle change of the suspension tank recorded by the high-definition camera can be directly obtained by referring to the angle identification plate coated with the fluorescent paint in the later-stage video processing.
Further, the initial position of the swing rope 11 coincides with the angle marking line 21 of the angle marking plate assembly.
Example 2:
the test method of the wind tunnel test research device for the swing of the cable crane bucket under the influence of any strong wind comprises the following steps:
step1: installing the swing device, installing a wind simulation device on one side surface of the swing device, erecting an anemorumbometer 17, installing a test recording instrument on the other side surface of the swing device, and installing a high-definition camera 15 on the opposite surface of the test recording instrument;
step2: a swinging rope 11 is arranged on the swinging device, and the other end of the swinging rope 11 is connected with a manual reel 13;
step3: the heights of the swing bracket 7, the angle marking plate tripod 18 and the swing rope 11 are adjusted, and the cycloid 11 is ensured to be coincided with an angle marking line 21 on an angle marking plate 22;
step4: weights with proper weight are placed in the suspension tank 12 according to the test requirements;
step5: starting a wind simulation device, adjusting the wind speed of the alternating-current multi-gear fan 5, and blowing the suspension tank 12;
step6: recording the swing angle change conditions of the swing rope 11 and the suspension tank 12 in the swing process through a high-definition camera 15;
step7: and performing post-processing on the video recorded by the high-definition camera 15, and analyzing the data.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are within the spirit of the invention and the scope of the claims.
Claims (7)
1. The utility model provides a cable crane tank sling wobbling wind tunnel test research device under strong wind influence which characterized in that: the wind simulation device is arranged on the side face of the swinging device, and the swinging device is used for simulating a cable crane tank crane and is matched with the wind simulation device to simulate the swinging condition of the cable crane tank crane under different wind speed grades; the swing device is matched with a test recording instrument for recording simulation test results, and the test recording instrument records the test results;
the wind simulation device comprises a wind box support (6), a wind box (1) is installed at the top of the wind box support (6), an alternating-current multi-gear fan (5) is installed inside the wind box (1), the wind box (1) is composed of a gradual change section (2), a hole distribution section (3) and a flat section (4), a wind speed and direction indicator (17) is arranged at the position of an air outlet of the wind box (1), and the wind speed and direction indicator (17) is installed on a wind direction indicator support (16);
the air filtering net is arranged in the gradual change section (2), and a rectangular porous air channel is arranged in the pore distribution section (3);
the swinging device comprises a swinging support (7), a cross rod (9) is installed at the top support of the swinging support (7), a cross beam (10) is installed between the cross rods (9), a swinging rope (11) is hoisted at the middle part of the cross beam (10), one end of the swinging rope (11) is connected with a suspension tank (12), the other end of the swinging rope bypasses a swinging rope guide hole (8) and is connected with a manual reel (13), and the swinging rope guide hole (8) is fixedly installed at the bottom of the cross rod (9).
2. The wind tunnel test research device for cable crane tank swinging under the influence of strong wind according to claim 1, characterized in that: the suspension tank (12) is made of light aluminum alloy, the surface of the suspension tank is coated with fluorescent paint, and the suspension tank is in a cylindrical shape and internally contains a weight with certain mass.
3. The wind tunnel test research device for cable crane tank swinging under the influence of strong wind according to claim 1, characterized in that: swing bracket (7) are supported by four liftable tripods, and every liftable tripod supports all contains multisection telescopic link, all indicates from last to two length dimensions supreme down and from down on every telescopic link.
4. The wind tunnel test research device for cable crane tank swinging under the influence of strong wind according to claim 1, characterized in that: the test recording instrument is formed by combining an angle identification plate component and a high-definition camera (15), wherein the high-definition camera (15) is arranged opposite to the angle identification plate component and is perpendicular to the wind speed direction.
5. The wind tunnel test research device for cable crane tank swinging under the influence of strong wind according to claim 4, characterized in that: the high-definition camera (15) is fixedly arranged on the camera bracket (14).
6. The wind tunnel test research device for cable crane tank swinging under the influence of strong wind according to claim 4, characterized in that: the angle marking plate assembly comprises an angle marking plate (22), the angle marking plate (22) is fixedly installed on an angle marking plate frame body (23), the angle marking plate frame body (23) is installed on a telescopic chute (20) in a supporting mode, the telescopic chute (20) is installed on an angle marking plate tripod (18), angle marking lines (21) are arranged on the angle marking plate (22), and the angle marking lines (21) are matched with angle scale marks (19) to indicate angle values; the angle scale lines (19) are marked by fluorescent paint, and are distinguished by different colors in the positive and negative directions;
the initial position of the swing rope (11) is superposed with an angle marking line (21) of the angle marking plate component.
7. A test method of the wind tunnel test research device for the swing of the cable crane bucket under the influence of strong wind is adopted according to any one of claims 1 to 6, and is characterized by comprising the following steps:
step1: installing the swing device, installing a wind simulation device on one side surface of the swing device, erecting an anemoscope (17), installing a test recording instrument on the other side surface of the swing device, and installing a high-definition camera (15) on the opposite surface of the test recording instrument;
step2: a swinging rope (11) is arranged on the swinging device, and the other end of the swinging rope (11) is connected with a manual reel (13);
step3: the heights of the swing support (7), the angle identification plate tripod (18) and the swing rope (11) are adjusted, and the swing rope (11) is ensured to be superposed with an angle identification line (21) on the angle identification plate (22);
step4: according to the test requirement, a weight with proper weight is placed in the suspension tank (12);
step5: starting a wind simulation device, adjusting the wind speed of the alternating current multi-gear fan (5) and blowing the suspension tank (12);
step6: recording the swing angle change conditions of the swing rope (11) and the suspension tank (12) in the swing process through a high-definition camera (15);
step7: and performing post-processing on the video recorded by the high-definition camera (15), and analyzing the data.
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| CN109697487A (en) * | 2018-12-04 | 2019-04-30 | 三峡大学 | A kind of cable machine cage conflicts early warning system with concrete construction machinery risk |
| CN110595989A (en) * | 2019-08-30 | 2019-12-20 | 国网福建省电力有限公司电力科学研究院 | Cable damage test platform and method for manually simulating strong wind and coastal environment |
| CN112924134A (en) * | 2021-01-25 | 2021-06-08 | 吉林大学 | Portable anti-wind stability test system |
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| JP2016120995A (en) * | 2014-12-25 | 2016-07-07 | Ｉｈｉ運搬機械株式会社 | Swing angle detection method and device of crane |
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| CN207515996U (en) * | 2017-11-20 | 2018-06-19 | 三峡大学 | The wind- tunnel investigation device that cable machine cage is swung under the influence of a kind of strong wind |
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