CN114993607B - Wind tunnel test device for multi-parameter adjustment of building externally attached awning - Google Patents
Wind tunnel test device for multi-parameter adjustment of building externally attached awning Download PDFInfo
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- CN114993607B CN114993607B CN202210773842.5A CN202210773842A CN114993607B CN 114993607 B CN114993607 B CN 114993607B CN 202210773842 A CN202210773842 A CN 202210773842A CN 114993607 B CN114993607 B CN 114993607B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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Abstract
The invention discloses a wind tunnel test device for multi-parameter adjustment of a building externally attached awning. The wind tunnel test model consists of a plurality of module grids which are arranged in an array, wherein the module grids are internally provided with the awning test module and the awning compensation module; the awning test module comprises a box body, a platform plate and a gear rotating mechanism; the gear rotating mechanism comprises a stepping motor gear, an arc-shaped track, an arc-shaped sliding block and a stepping motor push rod. The invention can realize the rapid adjustment of parameters of the projecting length, the inclined angle and the position of the building external awning in the building wind tunnel, improve the wind tunnel test efficiency, and realize the wind pressure test of the awning with the inclined angle and the projecting length dynamically changed under the condition of blowing.
Description
Technical Field
The invention relates to a wind load testing device, in particular to a wind tunnel test device for multi-parameter adjustment of a building externally attached awning.
Background
The awning is an important component of the building structure, is positioned at the entrance of a high-rise building, provides sunshade and rain protection for pedestrians at the entrance and the exit, and simultaneously prevents the high-altitude falling objects from damaging the pedestrians at the entrance and the exit. The building awning is developed towards the directions of large overhanging length, novel form and the like, and structurally has the characteristics of light weight, high flexibility and the like, and wind load is the main control load of the awning design. The awning wind load is extremely easy to be influenced by the structural form of the awning and the surrounding environment, the awning is easy to shake, overturn, fall off and the like greatly under the action of strong wind, and the safety of pedestrians below is seriously influenced. The building structure load standard does not strictly give the body form coefficients aiming at different types of awning, so that wind tunnel test is carried out on the building structure load standard, and the accurate obtaining of the body form coefficients of the awning has important significance on wind resistance design of the awning.
Because the body form factor of canopy is influenced by a plurality of factors such as canopy length, inclination, height, horizontal position, etc. when designing and structure selecting the canopy, the operating mode that waits to select is numerous, to the design preparation model of every canopy, carry out wind tunnel test and consume a large amount of manpower and materials. In the prior art, the change of single parameters such as the picking length or the inclination angle is mostly considered, the wind tunnel experimental model is complicated to disassemble, the time is greatly consumed in the experiment, the structural stability is influenced by manually changing working conditions, the problems of blockage and the like of measuring points are easily caused, the experimental result is influenced, and the experimental cost is increased.
Based on the analysis, the prior art lacks a awning wind tunnel test device which can automatically and rapidly perform parameter transformation of an awning in a wind tunnel test and realize coping with different parameter changes.
Disclosure of Invention
The invention aims to provide a wind tunnel test device for quickly adjusting the projecting length, the inclined angle and the position of a building externally attached awning, and the wind tunnel test device can also realize the test of the influence of dynamic changes of the inclined angle and the projecting length of the awning on the wind pressure of the awning under the condition of blowing. The device can automatically and rapidly perform parameter transformation of the awning in the wind tunnel test, and realize the wind tunnel test of the awning for coping with different parameter changes.
The technical scheme adopted for solving the technical problems is as follows:
the invention comprises a wind tunnel test model, a awning test module and an awning compensation module, wherein the wind tunnel test model is formed by a plurality of module grids which are arranged in an array, and the awning test module and the awning compensation module are arranged in the module grids.
The awning testing module comprises a box body, a platform plate and a gear rotating mechanism; a platform plate is arranged in the box body, the awning model is placed on the platform plate, racks parallel to the awning model are arranged on two sides of the awning model, the racks on two sides are connected with one end of the platform plate through a gear rotating mechanism, and the gear rotating mechanism drives the awning model to change in inclination angle; the platform plate and the awning model are arranged through grooves formed in the side, facing the incoming wind, of the box body, and wind pressure measuring points are arranged on the surface, extending out of the box body, of the awning model; the bottom surface of the other end of the platform plate is connected with the bottom surface of the through groove formed in the box body through a rolling bearing, and the top surface of the awning model at the through groove formed in the box body is connected with the top surface of the through groove through an elastic pressing block.
The gear rotating mechanism comprises a stepping motor gear, an arc-shaped track, an arc-shaped sliding block and a stepping motor push rod; the stepping motor gear is arranged on the platform plate, the gear of the stepping motor gear is meshed with the rack, and the awning model stretches out/stretches into the box body along the platform plate by rotating the stepping motor gear; the side of the platform plate is provided with a circular arc track, the circular arc track is provided with a circular arc sliding block in a sliding manner, the end part of the platform plate in the box body is hinged with the circular arc sliding block through a circular arc connector, the inner wall of the box body at the lower side of the platform plate is hinged with a stepping motor push rod, the upper end of the push rod of the stepping motor push rod is propped against the bottom surface of the platform plate, the platform plate is pushed to rotate around a rolling bearing by the stepping motor push rod, and the end part of the platform plate in the box body moves along the circular arc track together with the circular arc sliding block, so that the inclination angle change of the awning model is realized.
And a plurality of wind pressure measuring points are arranged at the positions of the awning model extending out of the upper surface and the lower surface of the box body, and the wind pressure measuring points are connected to a data acquisition device in the box body through wind pressure hoses.
The height of the wind tunnel test model is matched with the building where the awning is located, and the awning test module is arranged in a module grid corresponding to the building where the awning is located in the wind tunnel test model.
The building may be any building including, but not limited to, high rise buildings and low rise houses.
The rain fly model can be in various shapes, and is not limited to square and arc.
The invention has the beneficial effects that:
the invention can realize the rapid adjustment of parameters of the projecting length, the inclined angle and the position of the building external awning in the building wind tunnel, improve the wind tunnel test efficiency, and realize the wind pressure test of the awning with the inclined angle and the projecting length dynamically changed under the condition of blowing.
Drawings
Fig. 1 is a front view of the building model of the present invention.
Fig. 2 is a cross-sectional view of the canopy testing device of the present invention.
Fig. 3 is a partial detailed representation of the rain fly test apparatus.
Fig. 4 is a diagram of building and canopy parameters in an implementation.
FIG. 5 is a contour plot of the wind pressure coefficient of the upper surface of a rain fly in a positive windward situation in an implementation.
FIG. 6 is a contour plot of the wind pressure coefficient of the surface of a rain fly in a positive windward situation in an implementation.
In the figure: 1. wind tunnel test model 2, awning test module 3, awning compensation module 4, awning model 5, rack 6, wind pressure measuring point 7, wind pressure hose 8, data acquisition device, 9, a platform plate, 10, an elastic pressing block, 11, a rolling bearing, 12, a stepping motor gear, 13, an arc-shaped track, 14, an arc-shaped sliding block, 15, an arc-shaped connector, 16 and a stepping motor push rod.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the device comprises a wind tunnel test model 1, a awning test module 2 and an awning compensation module 3, wherein the wind tunnel test model 1 is formed by a plurality of module grids which are arranged in an array, and the awning test module 2 and the awning compensation module 3 are arranged in the module grids. The awning model 4 is arranged in a module grid by means of the awning test module 2.
As shown in fig. 2 and 3, the rain fly test module 2 includes a case, a platform plate 9, and a gear rotating mechanism; a platform plate 9 is arranged in the box body, the awning model 4 is placed on the platform plate 9, racks 5 parallel to the awning model 4 are arranged on two sides of the awning model 4, the racks 5 on two sides are connected with one end of the platform plate 9 through a gear rotating mechanism in the box body, and the gear rotating mechanism drives the awning model 4 to change in inclination angle; the platform plate 9 and the awning model 4 are arranged through grooves formed in the side, facing the incoming wind, of the box body, one part of the awning model 4 extends into the box body, the other part extends out of the box body, and wind pressure measuring points 6 are arranged on the surface, extending out of the box body, of the awning model 4; the bottom surface of the other end of the platform plate 9 is connected with the bottom surface of a through groove formed in the box body through a rolling bearing 11, the top surface of the awning model 4 at the through groove formed in the box body is connected with the top surface of the through groove through an elastic pressing block 10, and the bottom surface of the elastic pressing block 10 is arc-shaped, so that the platform plate 9 and the awning model 4 at the through groove formed in the box body are in compression connection with each other.
As shown in fig. 3, the gear rotating mechanism comprises a stepping motor gear 12, a circular arc-shaped track 13, a circular arc-shaped slide block 14 and a stepping motor push rod 16; the stepping motor gear 12 is arranged on the platform plate 9, the stepping motor gear 12 comprises a motor and a gear, the motor is arranged on the platform plate 9, the output shaft of the motor is synchronously connected with the gear, the gear of the stepping motor gear 12 is meshed with the rack 5, and the movement of the awning model 4 extending out of or into the box body along the platform plate 9 is realized by rotating the stepping motor gear 12; the side of the platform plate 9 is provided with a circular arc track 13, the circular arc track 13 is provided with a circular arc slide block 14 in a sliding manner, the end part of the platform plate 9 in the box body is hinged with the circular arc slide block 14 through a circular arc connector 15, the inner wall of the box body at the lower side of the platform plate 9 is hinged with a stepping motor push rod 16, the upper end of the stepping motor push rod 16 is propped against the bottom surface of the platform plate 9, the platform plate 9 is pushed to rotate around a rolling bearing 11 by the stepping motor push rod 16, the end part of the platform plate 9 in the box body and the circular arc slide block 14 move together along the circular arc track 13, the rotation of the awning model 4 on the platform plate 9 around the circular arc track 13 is realized, and the inclination change of the awning model 4 is realized.
The wind pressure measuring points 6 are arranged at a plurality of positions of the upper surface and the lower surface of the awning model 4 extending out of the box body, the wind pressure measuring points 6 are connected to the data acquisition device 8 in the box body through wind pressure hoses 7, and the wind pressure hoses 7 extend out from the end parts of the awning model 4 extending into the box body.
The awning test module 2 is made of ABS engineering plastic or glass fiber reinforced plastic.
The height of the wind tunnel test model 1 is matched with the building where the awning is located, and the awning test module 2 is arranged in the module grid corresponding to the position of the building where the awning is located in the wind tunnel test model 1, so that the height of the module grid where the awning test module 2 is located in the wind tunnel test model 1 is consistent with the height of the building where the awning is located.
In practice, it is generally composed of 1 canopy testing module 2 and a plurality of canopy compensating modules 3. The position of the awning in the building is changed by exchanging the positions of the awning test module 2 and a certain awning compensation module 3. In practice, the canopy compensation module 3 is left empty, i.e. without any provision.
Examples:
the use of the device will now be described by taking a certain wind tunnel test device and a test process as examples.
As shown in fig. 1 to 5, the test procedure is as follows:
1) Wind tunnel test models 1 are arranged on a wind tunnel turntable with the diameter of 3.5m of a wind tunnel of a building of a university ZD-1, the size of the building of the models 1 is 60cm wide by 30cm thick by 40cm high, the size of the awning test module 2 is 20cm wide by 30cm thick by 20cm high, and the size of the awning compensation module 3 is 20cm wide by 30cm thick by 20cm high. The test model is made of ABS plastic material. The awning model 4 has the dimensions of 20cm width multiplied by 1cm thickness, the awning length is 4 cm-20 cm, and the awning length is controlled by the stepping motor gear 12. The parameter diagram is shown in fig. 4.
2) Wind pressure measuring points 6 are distributed on the upper surface and the lower surface of the overhanging part of the awning model, wind pressure point adjustment measuring points are uniformly distributed on the wind pressure measuring points along the thickness direction of the awning, 10 measuring points are uniformly distributed on the 20cm of the awning model along the width direction, one measuring point is distributed on the lower surface of the awning model along the overhanging direction without 2cm, if the overhanging length is 20cm, 10 measuring points are distributed, 200 points are distributed on the whole, the upper surface and the lower surface of the awning model are correspondingly distributed with the measuring points, 400 wind pressure measuring points 6 are distributed on the upper surface and the lower surface of the awning model, the wind pressure measuring points 6 extend out of the rear end of the awning model 4 through a PVC hose 7 with the outer diameter of 1.2mm, and the wind pressure measuring points are connected to a DSM3400 data acquisition device 8 of Scan Valve company.
3) Through putting 1 canopy test module 2 in the centre, 1 respectively in canopy test module 2 both sides are gone up to canopy compensation module 3, and canopy compensation module 3 is respectively three at the second floor, reaches the purpose that the canopy that waits to test is located building bottom intermediate position.
4) And (3) rotating the stepping motor gear 12, and adjusting the overhanging length of the awning 4 to be determined as the overhanging length of the awning of 12 cm.
5) The stepper motor push rod 16 is adjusted to adjust the tilt angle of the awning 4 to 0 °.
6) The wind pressure coefficient of the upper surface of the awning and the wind pressure coefficient of the lower surface of the awning are obtained through testing of the data acquisition device 8, wherein a contour diagram of the wind pressure coefficient of the upper surface under the condition of positive windward is shown in fig. 5, and a contour diagram of the wind pressure coefficient of the lower surface under the condition of positive windward is shown in fig. 6.
7) The length of the overhanging awning can be changed by rotating the stepping motor gear 12, the inclination angle of the overhanging awning can be changed by adjusting the stepping motor push rod 16, and the position of the awning can be adjusted by exchanging the awning test module and the awning compensation module 3. Thereby realizing the test of the wind pressure coefficients of the awning with different overhanging lengths, different dip angles and different positions.
8) The gear 12 of the stepping motor and the push rod 16 of the stepping motor are dynamically adjusted and rotated in the wind tunnel test process, so that the wind pressure test of the awning with dynamically changed awning inclination angle and lifting length under the condition of blowing can be realized.
The above-described embodiments are intended to illustrate the present invention, not to limit it, and any modifications and variations made to the present invention within the spirit of the present invention and the scope of the appended claims fall within the scope of the present invention.
Claims (4)
1. The utility model provides a wind tunnel test testing arrangement about building appends multi-parameter adjustment of canopy which characterized in that:
the wind tunnel test system comprises a wind tunnel test model (1), a awning test module (2) and an awning compensation module (3), wherein the wind tunnel test model (1) is formed by a plurality of module grids which are arranged in an array, and the awning test module (2) and the awning compensation module (3) are arranged in the module grids;
the awning testing module (2) comprises a box body, a platform plate (9) and a gear rotating mechanism; a platform plate (9) is arranged in the box body, the awning model (4) is placed on the platform plate (9), racks (5) parallel to the awning model (4) are arranged on two sides of the awning model (4), the racks (5) on two sides are connected with one end of the platform plate (9) through a gear rotating mechanism, and the gear rotating mechanism drives the awning model (4) to change in inclination angle; the platform plate (9) and the awning model (4) are arranged through grooves formed in the side, facing the incoming wind, of the box body, and the awning model (4) is provided with wind pressure measuring points (6) on the surface extending out of the box body; the bottom surface of the other end of the platform plate (9) is connected with the bottom surface of a through groove formed in the box body through a rolling bearing (11), and the top surface of a awning model (4) at the through groove formed in the box body is connected with the top surface of the through groove through an elastic pressing block (10);
the gear rotating mechanism comprises a stepping motor gear (12), an arc-shaped track (13), an arc-shaped sliding block (14) and a stepping motor push rod (16); a stepping motor gear (12) is arranged on the platform plate (9), the gear of the stepping motor gear (12) is meshed with the rack (5), and the awning model (4) stretches out/stretches into the box body along the platform plate (9) by rotating the stepping motor gear (12); an arc-shaped track (13) is arranged beside the platform plate (9), an arc-shaped sliding block (14) is slidably arranged on the arc-shaped track (13), the end part of the platform plate (9) in the box body is hinged with the arc-shaped sliding block (14) through an arc-shaped connector (15), a stepping motor push rod (16) is hinged with the inner wall of the box body at the lower side of the platform plate (9), the upper end of the push rod of the stepping motor push rod (16) is propped against the bottom surface of the platform plate (9), the platform plate (9) is pushed by the stepping motor push rod (16) to rotate around a rolling bearing (11), and the end part of the platform plate (9) in the box body and the arc-shaped sliding block (14) move together along the arc-shaped track (13), so that the inclination angle of the awning model (4) is changed.
2. The wind tunnel test device for multi-parameter adjustment of an externally attached awning for a building according to claim 1, wherein the wind tunnel test device comprises: wind pressure measuring points (6) are arranged at a plurality of positions, extending out of the upper surface and the lower surface of the box body, of the awning model (4), and the wind pressure measuring points (6) are connected to a data acquisition device (8) in the box body through wind pressure hoses (7).
3. The wind tunnel test device for multi-parameter adjustment of an externally attached awning for a building according to claim 1, wherein the wind tunnel test device comprises: the height of the wind tunnel test model (1) is matched with a building where the awning is located, and a awning test module (2) is arranged in a module grid corresponding to the building where the awning is located in the wind tunnel test model (1).
4. A wind tunnel test device for multi-parameter adjustment of a building exterior awning according to claim 3, wherein: the building includes, but is not limited to, high-rise buildings and low-rise houses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210773842.5A CN114993607B (en) | 2022-07-01 | 2022-07-01 | Wind tunnel test device for multi-parameter adjustment of building externally attached awning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210773842.5A CN114993607B (en) | 2022-07-01 | 2022-07-01 | Wind tunnel test device for multi-parameter adjustment of building externally attached awning |
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| Publication Number | Publication Date |
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| CN114993607A CN114993607A (en) | 2022-09-02 |
| CN114993607B true CN114993607B (en) | 2023-06-16 |
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| CN202210773842.5A Active CN114993607B (en) | 2022-07-01 | 2022-07-01 | Wind tunnel test device for multi-parameter adjustment of building externally attached awning |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6488069B1 (en) * | 2000-07-20 | 2002-12-03 | Dometic Corporation | Rain dump structure for awning |
| CN206267439U (en) * | 2016-11-25 | 2017-06-20 | 精浚科技股份有限公司 | Movable masking extension apparatus |
| CN107888136A (en) * | 2017-12-15 | 2018-04-06 | 郑州天舜电子技术有限公司 | A kind of solar panels angle regulator of multistage sliding bar mechanism |
| CN216341240U (en) * | 2021-11-14 | 2022-04-19 | 石家庄翔卯至诚塑料制品有限公司 | Scalable formula of accomodating sunshine board canopy |
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