CN114964686A - Horizontal impact test device and method for detecting performance of bridge anti-collision device - Google Patents
Horizontal impact test device and method for detecting performance of bridge anti-collision device Download PDFInfo
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- CN114964686A CN114964686A CN202210505709.1A CN202210505709A CN114964686A CN 114964686 A CN114964686 A CN 114964686A CN 202210505709 A CN202210505709 A CN 202210505709A CN 114964686 A CN114964686 A CN 114964686A
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to a horizontal impact test device and a horizontal impact test method for detecting the performance of a bridge anti-collision device. The impact vehicle is arranged on the horizontal rail and is driven by a traction assembly. The speed sensor measures speed. The acceleration sensor measures acceleration. The pressure sensor measures the impact force. The impact vehicle is provided with a reduced scale bow model, and the high-speed camera is used for recording the deformation of the reduced scale bow model. The speed sensor, the acceleration sensor and the pressure sensor are in signal connection with the dynamic data acquisition instrument and the central control computer. The impact vehicle horizontally impacts an induction steel plate on the reaction wall, and is regarded as first impact loading. And replacing a reduced scale bow model on the impact vehicle, and installing a bridge anti-collision device on the counterforce wall. And the impact vehicle horizontally impacts the bridge anti-collision device and is regarded as secondary impact loading. And comparing the two loading conditions to analyze the effect of the bridge anti-collision device. The method can simulate the actual ship collision process so as to improve the accuracy of the anti-collision performance detection.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a horizontal impact test device and method for detecting the performance of a bridge anti-collision device.
Background
In recent years, the rapid development of our country's economy has increased the demand of the transportation industry. The development of the inland river water transportation industry promotes the large-scale ship and the improvement of the channel grade. However, the development of water transportation traffic causes the risk of accidents caused by ships impacting bridges in the channels to increase suddenly, and as the size of the bridges crossing the channels such as Yangtze river, Zhujiang river and the like is large, and the bridge construction positions are mostly positioned at important nodes of a traffic network or intersect with rivers, the consequences of the accidents caused by ship-bridge collision are serious, so that the bridges are damaged or even collapsed, ships and personnel are injured and killed, and severe economic losses are caused.
The newly-built bridges are provided with ship collision prevention devices, and part of the built bridges are also used for propelling the ship collision prevention devices. The bridge structure mainly uses steel or composite material anti-collision facilities. From the use condition, the conditions of uneven technical level, large construction quality difference and the like generally exist in the domestic bridge ship collision prevention device industry at present. With the rise of various new materials, various novel material anti-collision devices are produced, which also brings new challenges to the bridge anti-collision design. The anti-collision performance of part of anti-collision devices needs to be improved, and the requirements of bridge anti-collision design cannot be met; the problems of high manufacturing cost, high maintenance cost and high maintenance cost are caused by the fact that part of anti-collision devices pursue improvement of anti-collision capacity. In addition, after being installed, the anti-collision facilities of partial projects are damaged and broken in a short time, and even float into the main channel of the river to become an obstacle. Part of the anti-collision facilities resist the impact of ships and play a role in protection, but deep research and analysis are still lacked.
Due to nonlinear dynamic response in the collision process, the test cost of the ship and bridge collision problem is high, the implementation is difficult, the traditional simulation test equipment has many limitations, deep test research on the collision-proof device after collision is few at present, most of the research is based on theoretical analysis and finite element simulation research, the research is biased to theorization, and the reference value of the detection result is low.
Disclosure of Invention
The invention aims to provide a horizontal impact test device and a horizontal impact test method for detecting the performance of a bridge anti-collision device, which can simulate the actual ship collision process so as to improve the accuracy of anti-collision performance detection.
In order to achieve the purpose, the invention adopts the following technical scheme:
a horizontal impact test device for detecting the performance of a bridge anti-collision device comprises a horizontal rail, an impact vehicle, a counterforce wall, a hammer body, a vertical guide rail, a fixed pulley, a steel cable, a speed sensor, an acceleration sensor, a pressure sensor, a dynamic data acquisition instrument, a high-speed camera and a central control computer; the impact vehicle can be horizontally movably arranged on the horizontal rail; the drop hammer body can be vertically movably arranged on the vertical guide rail and is connected with one end of the steel cable, the other end of the steel cable is provided with a steel cable traction connecting part, and the steel cable is horizontally connected with the impact truck through the steel cable traction connecting part after being steered by the fixed pulley; the speed sensor is used for measuring and recording the moving speed of the impact vehicle; the acceleration sensor is arranged on the impact vehicle to measure and record the acceleration of the impact vehicle; the pressure sensor is arranged on the reaction wall to measure and record the impact force of the impact vehicle; the head of the impact vehicle is provided with a reduced-scale bow model, and the high-speed camera is used for recording the deformation of the reduced-scale bow model; the speed sensor, the acceleration sensor and the pressure sensor are in signal connection with the dynamic data acquisition instrument and the central control computer.
Preferably, the speed sensor is activated and the speed sensor triggers the acceleration sensor and the pressure sensor to measure and record speed, acceleration and impact force data of the impacting vehicle.
Preferably, an induction steel plate is attached to a surface of the reaction wall facing the impact truck by a plurality of bolts, and the pressure sensor is attached to the bolts.
Preferably, the impact vehicle is provided with a counterweight space for a counterweight.
Preferably, the reduced-size bow model is detachably mounted on the head of the impact vehicle.
Preferably, the horizontal impact test device for detecting the performance of the bridge anti-collision device further comprises a decoupling device, and the decoupling device can automatically disconnect the connection between the impact vehicle and the steel cable traction connecting part.
Preferably, the unhooking device is an electromagnetic or mechanical unhooking device.
Preferably, the bottom of the drop hammer body is filled with filler for shock insulation and energy absorption.
A horizontal impact test method for detecting the performance of a bridge anti-collision device comprises the horizontal impact test device for detecting the performance of the bridge anti-collision device and the steps of:
the method comprises the following steps: selecting the impact vehicle counterweight and the drop hammer body counterweight; setting the impact speed of the impact vehicle, and determining the initial height of the drop hammer body;
step two: connecting the reduced-scale bow model to the front end of the impact vehicle; installing the speed sensor, the acceleration sensor and the pressure sensor, and connecting the speed sensor, the acceleration sensor and the pressure sensor with the dynamic data acquisition instrument and the central control computer through signals; erecting the high-speed camera;
step three: lifting the falling hammer body to the initial height determined in the first step, and releasing the falling hammer body to enable the falling hammer body to perform free falling motion; the impact vehicle moves forwards to impact an induction steel plate on the counterforce wall, the first impact loading is considered, and the maximum impact force is recorded as F;
the speed sensor, the acceleration sensor and the pressure sensor measure and record speed, acceleration and impact force test data of the impact vehicle, and acquire signals through the dynamic signal acquisition instrument which transmits the signals to the central control computer;
step four: replacing the reduced scale bow model on the impact vehicle, and installing a bridge anti-collision device on the counterforce wall;
step five: lifting the falling hammer body to the initial height determined in the first step, and releasing the falling hammer body to enable the falling hammer body to perform free falling motion;
the impact vehicle moves forwards to impact the bridge anti-collision device on the counterforce wall, the second impact loading is considered, and the maximum impact force is recorded as F';
the speed sensor, the acceleration sensor and the pressure sensor measure and record speed, acceleration and impact force test data of the impact vehicle, and acquire signals through the dynamic signal acquisition instrument which transmits the signals to the central control computer;
step six: comparing the impact change conditions under the first impact loading and the second impact loading, and calculating the impact force reduction rate according to the following formula:
preferably, the speed sensor is activated and the speed sensor triggers the acceleration sensor and the pressure sensor to measure and record speed, acceleration and impact force data of the impacting vehicle.
The horizontal impact test device and the method for detecting the performance of the bridge anti-collision device have the advantages that: the steel cable is horizontally connected with the impact vehicle through the steel cable traction connecting part after being steered by the fixed pulley, so that horizontal impact force is provided for the impact vehicle. And because the head of the impact vehicle is provided with the reduced-scale bow model, the actual ship impact process can be simulated, and the accuracy of the anti-collision performance detection is improved.
Drawings
FIG. 1 is a schematic overall structure diagram of a horizontal impact test device for detecting the performance of a bridge anti-collision device according to an embodiment of the invention;
FIG. 2 is a structural view of an impact vehicle and a counterforce wall of an embodiment of the invention;
FIG. 3 is a block diagram of a portion of a draft assembly in accordance with an embodiment of the present invention;
FIG. 4 is a diagram of the position relationship of the impact truck, the reaction wall and the collection assembly in accordance with the embodiment of the present invention.
The component names and designations in the drawings are as follows:
the device comprises a horizontal rail (1), an impact vehicle (2), a steel cable traction connecting part (3), a unhooking device (4), a reaction wall (5), a drop hammer body (6), a vertical guide rail (7), a fixed pulley (8), a steel cable (9), a speed sensor (10), an acceleration sensor (11), a pressure sensor (12) and a high-speed camera (13).
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As shown in fig. 1, the embodiment discloses a horizontal impact test device for detecting the performance of a bridge anti-collision device. The horizontal impact test device for detecting the performance of the bridge anti-collision device comprises a horizontal rail 1, an impact vehicle 2, a steel cable traction connecting part 3, a unhooking device 4, a reaction wall 5, a drop hammer body 6, a vertical guide rail 7, a fixed pulley 8, a steel cable 9, a speed sensor 10, an acceleration sensor 11, a pressure sensor 12, a dynamic data acquisition instrument, a high-speed camera 13 and a central control computer.
The horizontal track 1 of the present embodiment is two flat steel rails disposed on the ground. The impact vehicle 2 is movably mounted on the horizontal rail 1. In the horizontal impact test, the impact truck 2 is moved along the horizontal rail 1 at a predetermined speed. The impact vehicle 2 of the present embodiment has steel wheel rails. The impact vehicle 2 runs on the horizontal rail 1 through steel wheel rails.
The impact vehicle 2 of the present embodiment is driven by a traction assembly. In other embodiments, the impact vehicle 2 may also have its own drive to travel on the horizontal track 1. The mass range of the impact vehicle 2 is required to be 10 t-100 t in the embodiment, the impact instantaneous speed reaches 5m/s, and meanwhile, the impact speed is controllable. The impact vehicle 2 should leave a space for the counterweight, and the counterweight is reasonably arranged so that the impact vehicle 2 does not shake when impacting the reaction wall 5.
As a preferable scheme, the impact vehicle 2 is provided with a reduced-scale bow model with equivalent rigidity towards the head of the counterforce wall 5 according to the fortification ship condition so as to approach the actual ship impact process, and therefore the accuracy of the detection result is improved.
The traction assembly of the embodiment comprises a drop hammer body 6, a vertical guide rail 7, a fixed pulley 8 and a steel cable 9. The wire rope 9 has a wire rope traction connection 3 to connect with the impact car 2. The drop hammer body 6 is used for providing impact energy. In other embodiments, the traction assembly may be a high power winch.
Continuing with FIG. 1, vertical guide rails 7 are mounted on the ground directly in front of the impact vehicle 2. The hammer body 6 is mounted on the vertical guide rail 7 and can slide up and down along the vertical guide rail 7. This embodiment further comprises a mounting frame arranged on one side of the vertical guide rail 7 for mounting two fixed pulleys 8. One end of the steel cable 9 is connected with the drop hammer body 6, and the other end of the steel cable 9 is connected to the impact vehicle 2 after passing through the fixed pulleys 8 on the two mounting frames and one fixed pulley 8 on the ground. Specifically, the other end of the wire rope 9 forms a wire rope traction link 3, and the wire rope traction link 3 is connected to the impact truck 2. The steel cable 9 of this embodiment should ensure that no damage or breakage occurs at the time of maximum impact force to ensure safety of the horizontal impact test. Wherein the three fixed pulleys 8 are used to adjust the direction of the wire rope 9 so that the wire rope traction connection 3 exerts a horizontal pulling force on the impact vehicle 2.
This embodiment still includes disengaging gear 4, and disengaging gear 4 is used for breaking away the connection that strikes car 2 and wire rope pull connecting portion 3 at horizontal impact test's in-process, and then breaks away from the connection that strikes car 2 and pull the subassembly for strike car 2 can be with the state striking reaction wall 5 at the uniform velocity. The unhooking device 4 of the present embodiment may be of an electromagnetic type or a mechanical type.
The reaction wall 5 of the present embodiment is installed directly in front of the impact vehicle 2 and between the impact vehicle 2 and the vertical guide rail 7. The reaction wall 5 of the present embodiment is mainly used to receive the instantaneous impact force of the impact vehicle 2. The reaction wall 5 can record the impact force after being impacted by the impact vehicle 2. The reaction wall 5 of the present embodiment is not easily damaged and does not undergo visible displacement under the maximum impact force of the impact vehicle 2. And connecting points are arranged on the reaction wall 5 so as to detachably fix the bridge anti-collision device on the reaction wall 5.
Preferably, the bottom of the drop hammer body 6 of the embodiment is filled with a large amount of fillers for shock insulation and energy absorption so as to prevent the drop hammer body 6 from being damaged.
As shown in fig. 3, the vertical guide 7 of the present embodiment preferably includes four high-strength rails. Four high-strength steel rails enclose a space, the drop hammer body 6 is positioned in the space, and the drop hammer body 6 is arranged on the four high-strength steel rails in a sliding manner.
As shown in fig. 4, the speed sensor 10 of the present embodiment employs a photogate speed sensor. The speed sensor 10 is installed near the horizontal rail 1 and between the impact truck 2 and the reaction wall 5. The speed sensor 10 is used to measure and record the speed of movement of the impact vehicle 2.
The speed sensor 10 is used to measure and record test data. The embodiment also comprises a dynamic data acquisition instrument. When the speed sensor 10 starts to measure and record the speed of the impact vehicle 2, a signal is sent to a central control computer through a dynamic data acquisition instrument, and the other sensors start to measure and record test data.
As shown in fig. 1, the acceleration sensor 11 of the present embodiment is mounted on a side frame of the impact vehicle 2. The length of the lead of the acceleration sensor 11 should be ensured to exceed the length of the horizontal rail 1, so as to prevent the acceleration sensor 11 and the dynamic data acquisition instrument from being damaged due to the excessively short lead.
The present embodiment is provided with a plurality of pressure sensors 12. The pressure sensor 12 may be a piezoelectric pressure sensor.
The reaction wall 5 is provided with an induction steel plate on the surface facing the impact vehicle 2 by a plurality of bolts. The pressure sensor 12 is mounted on the bolt and the movement of the pressure sensor 12 in the direction of the impact is not restricted.
One end of the dynamic data acquisition instrument of the embodiment is connected with the speed sensor 10, the acceleration sensor 11 and the pressure sensor 12, the other end of the dynamic data acquisition instrument is connected with the central control computer through a wire, the speed and the acceleration data of the impact vehicle 2 are acquired and recorded through the dynamic data acquisition instrument and the central control computer, and the instantaneous impact force on the reaction wall 5 is acquired and recorded.
The dynamic data acquisition instrument of the present embodiment may be mounted with the high-speed camera 13. The high-speed camera 13 of the embodiment is erected between the reduced scale bow model and the counterforce wall 5, is positioned on the outer side of the horizontal rail 1, and is used for recording the deformation conditions of the reduced scale bow model and the bridge anti-collision device.
The horizontal impact test method for detecting the performance of the bridge anti-collision device is based on the horizontal impact test device for detecting the performance of the bridge anti-collision device.
The method comprises the following steps: selecting a proper counter weight of the impact vehicle 2 and a proper counter weight of the drop hammer body 6 according to the collision prevention fortification conditions of the bridge collision prevention device and the project of which the protection performance needs to be detected; the impact velocity of the impact vehicle 2 is set and the starting height of the drop weight 6 is determined. In general, 4.1m/s can be taken as the impact velocity.
Step two: the fore model of the reduced-size ship is tightly connected to the front end of the impact vehicle 2 through a high-strength bolt; a speed sensor 10, an acceleration sensor 11 and a pressure sensor 12 are installed and are connected with a dynamic data acquisition instrument and a central control computer through wires;
starting a speed sensor 10, an acceleration sensor 11, a pressure sensor 12 and a dynamic data acquisition instrument to check whether each sensor normally operates;
and erecting the high-speed camera 13, and adjusting the parameters of the high-speed camera 13 to ensure that the high-speed camera 13 can clearly record the deformation condition of the reduced-scale bow model.
Step three: lifting the drop hammer body 6 to the initial height determined in the first step, and releasing the drop hammer body 6 to enable the drop hammer body 6 to perform free-fall vertical downward movement on the vertical guide rail 7. The gravitational potential energy of the drop hammer body 6 is converted into the kinetic energy of the impact vehicle 2. The impact vehicle 2 moves forwards to impact an induction steel plate on the reaction wall 5, and is regarded as first impact loading;
the speed sensor 10, the acceleration sensor 11 and the pressure sensor 12 measure and record speed, acceleration and impact force test data in the impact process of the impact vehicle 2, acquire signals through the dynamic signal acquisition instrument, process and transmit the signals to the data storage unit of the central control computer for storage.
Step four: replacing a reduced scale bow model on the impact vehicle 2, and installing a bridge anti-collision device on the counterforce wall 5; starting a speed sensor 10, an acceleration sensor 11, a pressure sensor 12 and a dynamic data acquisition instrument to check whether each sensor normally operates;
and adjusting the parameters of the high-speed camera 13 to ensure that the high-speed camera 13 can clearly record the deformation condition of the foreship model of the reduced-size ship.
Step five: lifting the drop hammer body 6 to the initial height determined in the first step, and releasing the drop hammer body 6 to enable the drop hammer body 6 to perform free-fall vertical downward movement on the vertical guide rail 7. The gravitational potential energy of the hammer falling body 6 is converted into the kinetic energy of the impact vehicle 2;
the impact vehicle 2 moves forwards to impact an anti-collision device on the reaction wall 5, and secondary impact loading is considered;
the speed sensor 10, the acceleration sensor 11 and the pressure sensor 12 measure and record speed, acceleration and impact force test data in the impact process of the impact vehicle 2, acquire signals through the dynamic signal acquisition instrument, process and transmit the signals to the data storage unit of the central control computer for storage.
Step six: and after the two horizontal impact tests in the third step and the fifth step, comparing the impact change conditions under the conditions of naked impact and collision avoidance according to relevant standard regulations, and analyzing the test results. The impact force reduction rate is calculated as follows:
in the formula: f is the instantaneous maximum impact force under the condition of naked collision, and the unit is N; f' is the instantaneous maximum impact force of the counterforce wall 5 when the anti-collision device is installed, and the unit is N.
The horizontal impact test device and method for detecting the performance of the bridge anti-collision device have the advantages that: compared with the prior art, the performance of the bridge anti-collision device can be evaluated more visually and quantitatively by the horizontal impact test of the embodiment. A reduced-scale bow model is arranged on the impact vehicle 2, so that the test can simulate the actual situation better.
The horizontal impact test of the embodiment is automatically triggered by the speed sensor 10, and signals are sent to start the acceleration sensor 11 and the pressure sensor 12 to measure and record test data, so that the degree of automation is high, and the safety is good.
The measured data of the embodiment is collected by the dynamic data acquisition instrument, and the test data such as speed, acceleration and impact force can be obtained by signal processing, so that the method is more accurate compared with the traditional method, and is reliable in work, economical and practical.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A horizontal impact test device for detecting the performance of a bridge anti-collision device is characterized by comprising a horizontal rail (1), an impact vehicle (2), a reaction wall (5), a drop hammer body (6), a vertical guide rail (7), a fixed pulley (8), a steel cable (9), a speed sensor (10), an acceleration sensor (11), a pressure sensor (12), a dynamic data acquisition instrument, a high-speed camera (13) and a central control computer; the impact vehicle (2) can be horizontally movably arranged on the horizontal rail (1); the drop hammer body (6) is vertically movably mounted on the vertical guide rail (7) and is connected with one end of the steel cable (9), the other end of the steel cable (9) is provided with a steel cable traction connecting part (3), and the steel cable (9) is horizontally connected with the impact vehicle (2) through the steel cable traction connecting part (3) after being turned by the fixed pulley (8); the speed sensor (10) is used for measuring and recording the moving speed of the impact vehicle (2); the acceleration sensor (11) is mounted on the impact vehicle (2) to measure and record the acceleration of the impact vehicle (2); the pressure sensor (12) is arranged on the counterforce wall (5) to measure and record the impact force of the impact vehicle (2); a reduced scale bow model is mounted at the head of the impact vehicle (2), and the high-speed camera (13) is used for recording the deformation of the reduced scale bow model; the speed sensor (10), the acceleration sensor (11) and the pressure sensor (12) are in signal connection with the dynamic data acquisition instrument and the central control computer.
2. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 1, wherein: the speed sensor (10) is started and the speed sensor (10) triggers the acceleration sensor (11) and the pressure sensor (12) to measure and record speed, acceleration and impact force data of the impact vehicle (2).
3. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 1, wherein: the reaction wall (5) faces the surface of the impact vehicle (2) and is provided with an induction steel plate through a plurality of bolts, and the pressure sensor (12) is arranged on the bolts.
4. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 1, characterized in that: the impact vehicle (2) is provided with a counterweight space for counterweight.
5. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 1, characterized in that: the head of the impact vehicle (2) is detachably provided with the reduced-scale bow model.
6. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 1, wherein: the horizontal impact test device for detecting the performance of the bridge anti-collision device further comprises a unhooking device (4), wherein the unhooking device (4) can automatically disconnect the connection between the impact vehicle (2) and the steel cable traction connecting part (3).
7. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 6, wherein: the unhooking device (4) is an electromagnetic type unhooking element or a mechanical type unhooking element.
8. The horizontal impact test device for detecting the performance of the bridge anti-collision device according to claim 1, wherein: and the bottom of the drop hammer body (6) is filled with a shock-insulation and energy-absorption filler.
9. A horizontal impact test method for detecting the performance of a bridge anti-collision device is characterized by comprising the horizontal impact test device for detecting the performance of the bridge anti-collision device according to any one of claims 1 to 8 and the following steps:
the method comprises the following steps: selecting the balance weight of the impact vehicle (2) and the balance weight of the hammer falling body (6); setting the impact speed of the impact vehicle (2), and determining the initial height of the drop hammer body (6);
step two: connecting the reduced-scale bow model to the front end of the impact vehicle (2); installing the speed sensor (10), the acceleration sensor (11) and the pressure sensor (12), and connecting the speed sensor (10), the acceleration sensor (11) and the pressure sensor (12) with the dynamic data acquisition instrument and the central control computer through signals; erecting the high-speed camera (13);
step three: lifting the drop hammer body (6) to the initial height determined in the step one, and releasing the drop hammer body (6) to enable the drop hammer body (6) to perform free-falling motion; the impact vehicle (2) moves forwards to impact an induction steel plate on the reaction wall (5), the first impact loading is considered, and the maximum impact force is recorded as F;
the speed sensor (10), the acceleration sensor (11) and the pressure sensor (12) measure and record speed, acceleration and impact force test data of the impact vehicle (2), and acquire signals through the dynamic signal acquisition instrument, and the dynamic signal acquisition instrument transmits the signals to the central control computer;
step four: replacing the reduced-scale bow model on the impact vehicle (2), and installing a bridge anti-collision device on the counterforce wall (5);
step five: lifting the drop hammer body (6) to the initial height determined in the step one, and releasing the drop hammer body (6) to enable the drop hammer body (6) to perform free-falling motion;
the impact vehicle (2) moves forwards to impact the bridge anti-collision device on the counterforce wall (5), the second impact loading is considered, and the maximum impact force is recorded as F';
the speed sensor (10), the acceleration sensor (11) and the pressure sensor (12) measure and record speed, acceleration and impact force test data of the impact vehicle (2), and acquire signals through the dynamic signal acquisition instrument, and the dynamic signal acquisition instrument transmits the signals to the central control computer;
step six: comparing the impact change conditions under the first impact loading and the second impact loading, and calculating the impact force reduction rate according to the following formula:
10. the horizontal impact test method for detecting the performance of the bridge anti-collision device according to claim 9, characterized in that: the speed sensor (10) is started and the speed sensor (10) triggers the acceleration sensor (11) and the pressure sensor (12) to measure and record speed, acceleration and impact force data of the impact vehicle (2).
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| CN202210505709.1A CN114964686A (en) | 2022-05-10 | 2022-05-10 | Horizontal impact test device and method for detecting performance of bridge anti-collision device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839813A (en) * | 2022-10-25 | 2023-03-24 | 杭州国电机械设计研究院有限公司 | Impact test method for ship lift rigid beam anti-collision system and related components |
| CN117125267A (en) * | 2023-10-26 | 2023-11-28 | 中国飞机强度研究所 | Impact power performance test system and method for landing gear of carrier-based aircraft |
| CN115839813B (en) * | 2022-10-25 | 2024-04-12 | 杭州国电机械设计研究院有限公司 | Impact test method for rigid beam anti-collision system of ship lift and related components |
-
2022
- 2022-05-10 CN CN202210505709.1A patent/CN114964686A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839813A (en) * | 2022-10-25 | 2023-03-24 | 杭州国电机械设计研究院有限公司 | Impact test method for ship lift rigid beam anti-collision system and related components |
| CN115839813B (en) * | 2022-10-25 | 2024-04-12 | 杭州国电机械设计研究院有限公司 | Impact test method for rigid beam anti-collision system of ship lift and related components |
| CN117125267A (en) * | 2023-10-26 | 2023-11-28 | 中国飞机强度研究所 | Impact power performance test system and method for landing gear of carrier-based aircraft |
| CN117125267B (en) * | 2023-10-26 | 2024-02-02 | 中国飞机强度研究所 | Impact power performance test system and method for landing gear of carrier-based aircraft |
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