CN204924542U - A wave force testing arrangement for wave wall - Google Patents
A wave force testing arrangement for wave wall Download PDFInfo
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- CN204924542U CN204924542U CN201520622511.7U CN201520622511U CN204924542U CN 204924542 U CN204924542 U CN 204924542U CN 201520622511 U CN201520622511 U CN 201520622511U CN 204924542 U CN204924542 U CN 204924542U
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Abstract
The utility model provides a set up three group strain rosettes on the surperficial diameter that a wave force testing arrangement for wave wall, with wave wall wall body plane of constraint vertically direction on set gradually butt joint disc, elastic rod, fixed attaching means, connect fixed attaching means one end at the elastic rod to can realize horizontal wave power, perpendicular wave force, total power, do all can direction angle, overturning moment and offset distance's etc. The real -time accurate test of always doing all can always through above setting. Stability and loading analysis for the structure provide required data. The utility model discloses a wave force testing arrangement for wave wall measures and the record based on three component techniques, at first adopt strain rosette technique transfer message, secondly full graetz connection is adopted to the strain rosette, not only satisfies the temperature self compensating but also realize the output signal quadruple and enlarge, adopt the thin pole of rigidity to connect butt joint disc and elastic rod at last to this reinforcing signal reception's the rigidity and the linearity reduce signal distortion.
Description
Technical Field
The utility model belongs to hydrology measurement system field, concretely relates to wave power testing arrangement for wave wall.
Background
In the hydraulic and harbour engineering arts, as various novel structures are proposed, there is no particular theory or formula to accurately calculate the forces acting on these structures, including wave forces and water flow forces, etc. However, these forces are direct factors affecting the structural stability, and therefore, it is necessary to apply a model test to verify the structural stability or determine the structural load, such as the measurement of the wave force. In the wave test or the water flow test, two methods are generally adopted for the total force test of the coast protection engineering building or the hydraulic structure, wherein one method is to arrange a pressure probe to acquire a pressure signal and then obtain the total force through interpolation integration, and the other method is to use a total force sensor. When the first method is adopted, a plurality of pressure probes need to be arranged on the surface of a structure, and because the test environment requirement of the pressure probes is high, fine particles such as silt enter the probes, fatal damage can be caused, the test cost is high, and in addition, the error of an integral result is large; when the traditional S-shaped total force sensor is used for total force test, usually, the total force in a single direction can only be measured due to special requirements of structural arrangement, for example, the measurement of wave force of a wave wall and the measurement of water flow force of tower-shaped construction can only be completed, and the measurement mode is relatively rigid and single.
The invention application with the application number of '201410294079.3' discloses centrifugal model test wave circulation load simulation equipment and a test method thereof, wherein the equipment consists of a control part, a driving part and a force output part; an industrial personal computer of the control part is connected with a driving power amplifier through a data acquisition card connection signal conditioning and adapter; a driving power supply of the driving part is connected with the two exciters through a driving power amplifier; the wave action force generated by the two exciters of the force output part is applied to a research target in a non-contact mode through the armature suspended in the center below the top cover of the model box; the two exciters are respectively provided with a horizontal displacement laser displacement sensor and a settlement laser displacement sensor; a force sensor is arranged in the exciter; the output of each sensor is connected with an industrial personal computer. The design theory and thought followed and the corresponding method are all different from the application.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems and overcome the defects of low accuracy and single test result of the conventional total force testing device, the utility model provides a wave force testing device for a wave wall, which is used for measuring and recording based on a three-component force technology; transmitting information by adopting a strain rosette technology; the strain rosettes are connected in a full bridge mode, so that temperature self-compensation is met, and quadruple amplification of output signals is realized; then, adopt the rigidity pin to connect butt joint disc and elastic rod to this rigidity and the linearity that strengthens signal reception reduces signal distortion, and finally, adopt the lag tube to set up in the elastic rod periphery, avoid the influence of external environment to measurement accuracy. The technical scheme is as follows:
the utility model provides a wave power testing arrangement for wave wall sets up on wave wall's wall, its characterized in that:
comprises a butt joint disc (1), an elastic rod (2) and a fixed restraint piece (3) which are sequentially arranged in the direction vertical to a stress plane of a wave wall body,
three groups of strain flowers (4) are arranged on the surface diameter of one end of the elastic rod (2) connected with the fixed constraint piece (3),
the three groups of strain flowers are all two-piece type, the included angles between the two strain flowers in the three groups and the central axis of the elastic rod are both 45 degrees,
the connecting line of the two strain flowers in the first group of strain flowers is parallel to the X axial direction of the force-bearing plane,
the connecting line of the two strained flowers in the second group of strained flowers is parallel to the Y-axis direction of the stress plane,
the first group of strain flowers and the second group of strain flowers are arranged in a concentric circle,
the three groups of the corresponding flowers are connected to a data acquisition analyzer (8) through signal shielding wires (7).
According to the utility model discloses a wave power testing arrangement for wave wall, its characterized in that:
two strain rosettes in the first group of strain rosettes, the second group of strain rosettes and the third group of strain rosettes are all connected into a Wheatstone bridge in a full-bridge mode.
According to the utility model discloses a wave power testing arrangement for wave wall, its characterized in that:
the second group of strain flowers and the first group of strain flowers are arranged at an included angle of 90 degrees with each other.
According to the utility model discloses a wave power testing arrangement for wave wall, its characterized in that:
the butt joint disc (1) is connected with the elastic rod (2) through a rigid thin rod (5).
According to the utility model discloses a wave power testing arrangement for wave wall, its characterized in that:
a protective sleeve (6) is fixedly arranged on the periphery of the elastic rod (2),
the protective sleeve (6) is fixedly connected with the fixed constraint piece (3).
According to the utility model discloses a wave power testing arrangement for wave wall, its characterized in that:
the diameter of the butt joint disc (1) is 2.9cm-3.1cm,
the thickness of the butt joint disc (1) is 1.9mm-2.1 mm.
According to the utility model discloses a wave power testing arrangement for wave wall, its characterized in that:
the length of the elastic rod (2) is 19cm-21cm,
the diameter of the elastic rod (2) is 3.9cm-4.1 cm.
According to the utility model discloses a testing arrangement of wave force of wave wall, its characterized in that:
the diameter of the protective sleeve (6) is twice of that of the elastic rod (2).
According to the utility model discloses a testing arrangement of wave force of wave wall, its characterized in that:
the two ends of the rigid thin rod are arranged in a thread shape, and the rigid thin rod (5), the butt joint disc (1) and the elastic rod (2) are in threaded connection.
The utility model discloses a wave force testing device for wave wall, which is based on three-component force technology to measure and record; firstly, information is transmitted by adopting a strain rosette technology; secondly, the strain rosettes are connected in a full bridge mode, so that temperature self-compensation is met, and quadruple amplification of output signals is realized; then, adopt the rigidity pin to connect butt joint disc and elastic rod to this rigidity and the linearity that strengthens signal reception reduces signal distortion, and finally, adopt the lag tube to set up in the elastic rod periphery, avoid the influence of external environment to measurement accuracy.
The utility model discloses a wave force testing arrangement for wave wall can realize the real-time accurate test of horizontal wave force, vertical wave force, total power direction angle, the moment of overturning and total power offset distance etc. test convenience, response speed are fast, environmental suitability is strong; the arrangement of the protective sleeve and the rigid thin rod can avoid the influence of the external environment on the test precision, particularly the influence of waves or water flow on the rod piece.
Drawings
In the figure, the position of the upper end of the main shaft,
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a graph showing test data in the example;
specifically, FIG. 2-1 is a graph showing horizontal wave force data,
FIG. 2-2 is a graph showing vertical wave force data,
FIGS. 2-3 are graphs showing the total force data,
FIGS. 2-4 are graphs showing the total force direction angle data,
FIGS. 2-5 are graphs showing torque (overturning moment) data,
FIGS. 2-6 are graphs showing total force deflection distance data;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a side view of FIG. 1;
fig. 5 is a structural schematic diagram of three groups of strain roses in the utility model.
In the figure, 1 is a butt joint disc; 2 is an elastic rod; 3 is a fixed restraint piece; 4 is a strain flower; 5 is a rigid thin rod; 6 is a protective sleeve; 7 is a signal shielding wire; and 8, a data acquisition analyzer.
Detailed Description
Next, a wave force testing device for a wave wall according to the present invention will be described in further detail with reference to the drawings and the following detailed description.
The wave force testing device for the wave wall shown in figures 1, 3 and 4 is arranged on the wall of the wave wall and comprises a butt joint disc 1, an elastic rod 2 and a fixed restraint piece 3 which are sequentially arranged in the direction vertical to a stress plane of the wave wall body,
three groups of strain flowers 4 are arranged on the diameter of the surface of one end of the elastic rod 2 connected with the fixed constraint part 3,
the three groups of strain flowers are all two-piece type, the included angles between the two strain flowers in the three groups and the central axis of the elastic rod are both 45 degrees,
the connecting line of the two strain flowers in the first group of strain flowers is parallel to the X axial direction of the force-bearing plane,
the connecting line of the two strained flowers in the second group of strained flowers is parallel to the Y-axis direction of the stress plane,
the first group of strain flowers and the second group of strain flowers are arranged in a concentric circle,
the three groups of the corresponding chips are connected to a data acquisition analyzer 8 through signal shielding wires 7.
Wherein,
two strain rosettes in the first group of strain rosettes, the second group of strain rosettes and the third group of strain rosettes are all connected into a Wheatstone bridge in a full-bridge mode. (as shown in FIG. 5)
Wherein,
the second group of strain flowers and the first group of strain flowers are arranged at an included angle of 90 degrees with each other.
Wherein,
the butt joint disc 1 is connected with the elastic rod 2 through a rigid thin rod 5.
Wherein,
a protective sleeve 6 is fixedly arranged on the periphery of the elastic rod 2,
the protective sleeve 6 is fixedly connected with the fixed constraint piece (3).
Wherein,
the diameter of the butt joint disc 1 is 2.9cm-3.1cm (preferably 3),
the thickness of the butt joint disc 1 is 1.9mm-2.1mm (preferably 2).
Wherein,
the length of the elastic rod 2 is 19cm-21cm (preferably 20),
the diameter of the elastic rod 2 is 3.9cm-4.1cm (preferably 4).
Wherein,
the diameter of the protective sleeve 6 is twice the diameter of the elastic rod 2.
Wherein,
the two ends of the rigid thin rod are arranged in a thread shape, and the rigid thin rod 5 is in threaded connection with the butt joint disc 1 and the elastic rod 2.
A wave power testing arrangement for wave wall is used for providing the stability of measuring structure and the required data of load analysis, corresponding test assembly and step with it as follows:
s1: an elastic rod 2 is arranged in the direction vertical to the stress plane of the wave wall body through a butt joint disc 1
The elastic rod is used for sensing and transmitting stress;
s2: the other end of the elastic rod is provided with a fixed restraint part 3, the surface diameter of one end of the elastic rod 2 connected with the fixed restraint part 3 is provided with three groups of strain flowers 4, the three groups of strain flowers are two pieces, the included angles between two strain flowers in the three groups and the central axis of the elastic rod are both 45 degrees,
the connecting line of the two strain flowers in the first group of strain flowers is parallel to the X axial direction of the force-bearing plane,
the connecting line of the two strained flowers in the second group of strained flowers is parallel to the Y-axis direction of the stress plane,
the first group of strain flowers and the second group of strain flowers are arranged in a concentric circle;
s3: obtaining the main strain value epsilon of the surface positions of the two ends of the diameter of the elastic rod where the strain rosettes are located according to the voltage value of the first group of strain rosettes1，
Obtaining the main strain value epsilon of the first point position according to the voltage value of the second group of strain rosettes2，
According to the principal strain value epsilon1、ε2Obtaining the bending moment M of the root section of the elastic rodθAnd the direction angle theta of the total force corresponding to the bending moment;
s4: according to the distance L between the section of the first group of strain flowers and the section of the second group of strain flowers and the butting disk and the distance M in the step S3θObtaining the total force F borne by the wall body, the horizontal force Fx and the vertical force Fy borne by the wall body;
s5: according to the firstThe voltage values of the three groups of strain rosettes obtain the shear strain value epsilon of the point position3And a torque T;
s6: the distance d of the total force acting point from the central axis of the elastic rod 2 is obtained according to the torque T in step S5 and the total force F in step S4. (the data information maps above are shown in FIG. 2).
Examples
A wave force testing device for a wave wall comprises a butt joint disc, a rigid thin rod, an elastic rod, a protective sleeve, a first group of strain flowers, a second group of strain flowers, a third group of resistance strain flowers, a signal shielding wire, a data acquisition analyzer and a fixed restraint piece (shown in figure 1). Wherein the center of the butt joint disc is provided with screw holes (the aperture is matched with the threads at two ends of the rigid slender rod), and the circumference direction is provided with 4 screw holes; both ends of the rigid thin rod are in a thread shape; the root of the elastic rod is fixedly connected with the fixed constraint part, and the head of the elastic rod is provided with a threaded hole and is connected with the rigid thin rod; the protective sleeve covers the outside of the elastic rod, is fixedly connected with the fixed constraint part and has the diameter twice that of the elastic rod; the first group of strain patterns are arranged at two ends of the diameter of the surface of the elastic rod, the strain patterns are two pieces at an angle of 90 degrees, and an included angle between the two strain pieces and the central axis of the elastic rod is 45 degrees during arrangement; the second group of strain flowers are arranged at two ends of the diameter with the included angle of 90 degrees with the diameter of the first group of strain flowers, and the arrangement mode is the same as that of the first group of strain flowers; the third group of strain rosettes are arranged at two ends of the elastic rod with any diameter in the same way as the first group of strain rosettes; the strain rosette is connected with the data acquisition analyzer through a signal shielding wire
The length of the elastic rod is 20cm, the diameter of the elastic rod is 4cm, the diameter of the protective sleeve is 8cm, the length of the protective sleeve is 20cm, the diameter of the rigid thin rod is 5mm, the length of the rigid thin rod is 5cm, the diameter of the butt joint disc is 3cm, and the thickness of the butt joint disc is 2 mm. The types of the first group to the third group of resistance strain rosettes are as follows: BX120-2CA, resistance: 120 ± 0.3 Ω, sensitivity coefficient: 2.08 ± 1.0%, sensitive gate length: 2 mm.
Taking the arc wave wall as an example, the method mainly tests wave loads under the action of waves in a section model test, wherein the wave loads comprise horizontal wave force, vertical wave force, total force direction angle, overturning moment, total force offset distance and the like. The method comprises the following specific steps:
1. adhering the first group to the third group of 3 groups of resistance strain patterns on the peripheral surface of the lower end of the elastic rod according to the test requirement, then taking the elastic rod as a reference to enable the test device to be vertical to the plane where the acting force of an acting object is located, enabling the diameter of the first group of strain gauges to be in the x direction to be tested and the diameter of the second group of strain patterns to be in the y direction vertical to the x direction, and then fixing the strain patterns through a fixing and restraining part;
2. respectively connecting the first group of strain rosettes, the second group of strain rosettes and the third group of strain rosettes into a Wheatstone bridge in a full-bridge mode;
3. dividing voltage signals measured by a full-bridge circuit of the first group of strain roses and the second group of strain roses by 4 to convert the voltage signals into 45-degree directional strain epsilon of 2 point positionsM1' and εM2'; deducing the bending moment M at the measuring point according to the bending normal stress formula of the mechanics of materialsθAnd the bending moment corresponds to the direction angle theta of the total force.
Wherein E is the elastic modulus of the elastic rod 3 is less than or equal to 20 Gpa;
εM1' and εM2' respectively representing the strain values of the point positions of the first group of strain flowers and the second group of strain flowers at the 45-degree azimuth;
is the bending section coefficient of the elastic rod 3;
Mθbending moment of the cross section where the first group of strain rosettes and the second group of strain rosettes are located;
theta is an included angle between the total force and the horizontal direction;
d is the section diameter of the elastic rod 3;
combining equation (1) and equation (2) yields
θ＝arctan(εM2′/εM1′)，
4. The distance between the first group of strain rosettes and the second group of strain rosettes and the butt joint disc is L, the total force F borne by the structure is calculated,
horizontal force Fx＝F·cosθ，
Vertical force Fy＝F·sinθ。
5. Dividing the voltage signal of the third set of strain rosettes by 4 to convert to strain epsilon at 45 deg. of the pointn3′，
And deducing the torque T on the elastic rod according to a material mechanics shear stress formula.
Wherein G is the shear modulus of the elastic rod 3;
εn3' represents the strain at the point of the third set of strain rosettes at 45 °;
is the torsional section coefficient of the elastic rod 3.
6. Dividing the torque T obtained in the fifth step by the total force F obtained in the fourth step to obtain the distance of the total force action position deviating from the central axis of the elastic rodPositive values indicate that the resilient lever is subjected to a counterclockwise torque, and negative values are opposite, thereby achieving accurate positioning of the total force.
The length of the arc wave wall is 50cm, after a testing device is installed, a portable electronic scale with level bubbles acts on 10kg of tensile force in the horizontal direction and the vertical direction respectively to calibrate a bending moment testing part, then the bending moment testing part deviates a certain distance from a fixed position and is perpendicular to an elastic rod, a 5kg of tensile force acts on the position of the bending moment testing part deviating a certain distance from the fixed position and is deviated by 3cm of an axis, a torque testing part is calibrated, and a calibration coefficient is given for testing. Because the device is arranged at both ends of the arc wave wall, a signal tested by the method and the device is subjected to double amplification time course curve as shown in figure 2.
According to the test results, it can be obviously seen (as shown in fig. 2, specifically 2-1 to 2-6), the wave load is not limited to horizontal wave force, vertical wave force, total force direction angle, torque (overturning moment) or total force offset distance, and the response period is the same as the input wave period, and the test method and the device thereof are accurate and reliable.
The utility model discloses a wave force testing device for wave wall, which is based on three-component force technology to measure and record; firstly, information is transmitted by adopting a strain rosette technology; secondly, the strain rosettes are connected in a full bridge mode, so that temperature self-compensation is met, and quadruple amplification of output signals is realized; then, adopt the rigidity pin to connect butt joint disc and elastic rod to this rigidity and the linearity that strengthens signal reception reduces signal distortion, and finally, adopt the lag tube to set up in the elastic rod periphery, avoid the influence of external environment to measurement accuracy.
The utility model discloses a wave force testing arrangement for wave wall can realize the real-time accurate test of horizontal wave force, vertical wave force, total power direction angle, the moment of overturning and total power offset distance etc. test convenience, response speed are fast, environmental suitability is strong; the arrangement of the protective sleeve and the rigid thin rod can avoid the influence of the external environment on the test precision, particularly the influence of waves or water flow on the rod piece.
Claims (9)
1. The utility model provides a wave power testing arrangement for wave wall sets up on wave wall's wall, its characterized in that:
comprises a butt joint disc (1), an elastic rod (2) and a fixed restraint piece (3) which are sequentially arranged in the direction vertical to a stress plane of a wave wall body,
three groups of strain flowers (4) are arranged on the surface diameter of one end of the elastic rod (2) connected with the fixed constraint piece (3),
the three groups of strain flowers are all two-piece type, the included angles between the two strain flowers in the three groups and the central axis of the elastic rod are both 45 degrees,
the connecting line of the two strain flowers in the first group of strain flowers is parallel to the X axial direction of the force-bearing plane,
the connecting line of the two strained flowers in the second group of strained flowers is parallel to the Y-axis direction of the stress plane,
the first group of strain flowers and the second group of strain flowers are arranged in a concentric circle,
the three groups of the corresponding flowers are connected to a data acquisition analyzer (8) through signal shielding wires (7).
2. A wave force testing device for a wave wall according to claim 1, wherein:
two strain rosettes in the first group of strain rosettes, the second group of strain rosettes and the third group of strain rosettes are all connected into a Wheatstone bridge in a full-bridge mode.
3. A wave force testing device for a wave wall according to claim 1, wherein:
the second group of strain flowers and the first group of strain flowers are arranged at an included angle of 90 degrees with each other.
4. A wave force testing device for a wave wall according to claim 1, wherein:
the butt joint disc (1) is connected with the elastic rod (2) through a rigid thin rod (5).
5. A wave force testing device for a wave wall according to claim 1, wherein:
a protective sleeve (6) is fixedly arranged on the periphery of the elastic rod (2),
the protective sleeve (6) is fixedly connected with the fixed constraint piece (3).
6. A wave force testing device for a wave wall according to claim 1, wherein:
the diameter of the butt joint disc (1) is 2.9cm-3.1cm,
the thickness of the butt joint disc (1) is 1.9mm-2.1 mm.
7. A wave force testing device for a wave wall according to claim 1, wherein:
the length of the elastic rod (2) is 19cm-21cm,
the diameter of the elastic rod (2) is 3.9cm-4.1 cm.
8. The wave force testing device for the wave wall according to claim 5, wherein:
the diameter of the protective sleeve (6) is twice of that of the elastic rod (2).
9. The wave force testing device for the wave wall according to claim 4, wherein:
the two ends of the rigid thin rod are arranged in a thread shape, and the rigid thin rod (5), the butt joint disc (1) and the elastic rod (2) are in threaded connection.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107631826A (en) * | 2017-10-16 | 2018-01-26 | 山东省科学院海洋仪器仪表研究所 | A kind of ocean wave power monitoring device |
| CN108750001A (en) * | 2018-06-22 | 2018-11-06 | 上海船舶运输科学研究所 | Wave Integrated Measurement System when ship's navigation |
| CN108917821A (en) * | 2018-03-17 | 2018-11-30 | 鲁东大学 | A kind of marine eco-environment monitoring system |
| CN109555172A (en) * | 2019-01-03 | 2019-04-02 | 水利部交通运输部国家能源局南京水利科学研究院 | The laboratory measurement method of Oversea bridge basis wave force |
| CN109960217A (en) * | 2017-12-22 | 2019-07-02 | 财团法人工业技术研究院 | The method for building up of toolroom machine Service controll simulator and controlled body Model |
| CN112577655A (en) * | 2020-12-03 | 2021-03-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for measuring wave force of structure of sea-crossing bridge |
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- 2015-08-18 CN CN201520622511.7U patent/CN204924542U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107631826A (en) * | 2017-10-16 | 2018-01-26 | 山东省科学院海洋仪器仪表研究所 | A kind of ocean wave power monitoring device |
| CN107631826B (en) * | 2017-10-16 | 2019-07-26 | 山东省科学院海洋仪器仪表研究所 | A kind of ocean wave power monitoring device |
| CN109960217A (en) * | 2017-12-22 | 2019-07-02 | 财团法人工业技术研究院 | The method for building up of toolroom machine Service controll simulator and controlled body Model |
| CN109960217B (en) * | 2017-12-22 | 2020-08-04 | 财团法人工业技术研究院 | Machine tool service control simulation device and method for establishing controlled body model |
| CN108917821A (en) * | 2018-03-17 | 2018-11-30 | 鲁东大学 | A kind of marine eco-environment monitoring system |
| CN108750001A (en) * | 2018-06-22 | 2018-11-06 | 上海船舶运输科学研究所 | Wave Integrated Measurement System when ship's navigation |
| CN108750001B (en) * | 2018-06-22 | 2023-08-15 | 上海船舶运输科学研究所 | Comprehensive wave measurement system for ship navigation |
| CN109555172A (en) * | 2019-01-03 | 2019-04-02 | 水利部交通运输部国家能源局南京水利科学研究院 | The laboratory measurement method of Oversea bridge basis wave force |
| CN112577655A (en) * | 2020-12-03 | 2021-03-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for measuring wave force of structure of sea-crossing bridge |
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