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CN-224232278-U - Dynamic simulation demonstration model of cable-stayed bridge

CN224232278UCN 224232278 UCN224232278 UCN 224232278UCN-224232278-U

Abstract

The utility model provides a dynamic simulation demonstration model of a cable-stayed bridge, which comprises a base, a transverse ruler, an oblique stay rope, a driving motor and a force sensor, wherein the transverse ruler, the oblique stay rope, the driving motor and the force sensor are supported on the base. The oblique stay cord is connected to the driving motor through a pulley block, the pulley block comprises a first pulley and a second pulley, and an output shaft of the driving motor is connected with a driving pulley to drive synchronous rotation. When the driving pulley rotates, the oblique stay rope winds or releases around the driving pulley to drive the transverse ruler to swing, and the change of the pulling force is measured and represented. The horizontal length direction of the transverse ruler is taken as the x direction, and the rotation axes of the first pulley and the second pulley are vertical and parallel in the y direction. The first pulley, the second pulley and the transverse ruler are positioned on the same side of the vertical rod, and the direction of the rotation axis of the driving pulley is parallel to the x axis. Therefore, in the process of dynamically simulating the change of the tension state of the cable-stayed rope of the cable-stayed bridge, the accuracy and intuitiveness of the force measurement data of the sensor are ensured.

Inventors

  • LI TIWEI
  • ZHANG LEI
  • LU YIGANG

Assignees

  • 南京大德科教设备有限公司

Dates

Publication Date
20260512
Application Date
20241213

Claims (15)

  1. 1. The dynamic simulation demonstration model for the cable-stayed bridge is characterized by comprising a base, a transverse ruler, an oblique stay rope, a driving motor and a force sensor; the upper surface of the base is fixedly provided with an upright rod extending upwards; The transverse ruler is characterized in that a rotatable installation relation is formed between one end of the transverse ruler and the upright rod, a first hook is arranged on the transverse ruler, and the first hook is connected with the tail end of the oblique stay rope and can be pulled by the oblique stay rope, so that the transverse ruler performs deflection movement around the installation position of the transverse ruler in space; the cable-stayed rope is arranged to be connected to the output end of the driving motor through a pulley block, and the pulley block comprises a first pulley arranged in the top direction of the vertical rod and a second pulley arranged in the bottom direction of the vertical rod; The output shaft of the driving motor is connected with a driving pulley, and the driving pulley is driven to synchronously rotate by the rotation of the driving motor; The cable-stayed rope extends from the first hook to bypass the first pulley and the second pulley in turn, further extends to the driving pulley and can be wound or released around the driving pulley when the driving pulley rotates clockwise or anticlockwise; The second pulley is also connected with a force sensor, and the force sensor is used for detecting the force born by the second pulley in real time to represent the tension of the inclined pull rope so as to dynamically simulate the tension state change of the inclined pull rope influenced by the dead weight of the transverse ruler; The longitudinal direction of the transverse ruler, which is arranged on the upright rod and is in a horizontal state, is taken as an x direction, the direction of the rotation axis of the first pulley is a y direction perpendicular to the x direction, and the direction of the rotation axis of the second pulley is a y direction perpendicular to the x direction; the rotating axis of the first pulley is parallel to the rotating axis of the second pulley, and the first pulley, the second pulley and the transverse ruler are positioned on the same side of the vertical rod; The direction of the rotation axis of the driving pulley is parallel to the x axis.
  2. 2. The cable-stayed bridge dynamic simulation demonstration model of claim 1, wherein the distance d1 between the first pulley and the central line of the vertical rod along the x direction and the distance d2 between the second pulley and the central line of the vertical rod along the x direction satisfy d1=d2.
  3. 3. The cable-stayed bridge dynamic simulation demonstration model of claim 1, wherein the distance d3 between the first pulley and the central line of the vertical rod along the y direction and the distance d4 between the second pulley and the central line of the vertical rod along the y direction satisfy d3=d4.
  4. 4. A dynamic simulation demonstration model of a cable-stayed bridge according to any one of claims 1-3, wherein the oblique stay cord is positioned in the same plane from the fixed connection point of the first hook, the position of bypassing the first pulley and the position of bypassing the second pulley.
  5. 5. The dynamic simulation demonstration model of a cable-stayed bridge according to claim 1, wherein tangent lines of the cable-stayed rope passing through the second pulley in and out direction are parallel to each other.
  6. 6. The dynamic simulation demonstration model of the cable-stayed bridge according to claim 1, wherein the tangent line of the connection position of the oblique stay rope and the driving pulley is kept on the same straight line with the tangent line of the position of the cable-stayed rope which bypasses the second pulley and enters the driving pulley based on the arrangement of the rotation axis of the driving pulley and the rotation axis of the second pulley.
  7. 7. The dynamic simulation demonstration model of a cable-stayed bridge according to claim 1, wherein the head end of the cable-stayed rope is fixed with the driving pulley and is wound or released around the rotation direction thereof with respect to the tail end of the cable-stayed rope.
  8. 8. The cable-stayed bridge dynamic simulation demonstration model according to claim 1, wherein the driving motor is installed on the vertical rod through a motor installation frame and is positioned below the installation position of the transverse ruler; The second pulley is positioned at the same side as the driving motor and at the lower position of the transverse ruler relative to the mounting position of the transverse ruler, and the first pulley is positioned at the upper position of the transverse ruler.
  9. 9. The dynamic simulation demonstration model of the cable-stayed bridge according to claim 1, wherein a first chute which is in a longitudinal square shape along the transverse ruler is formed on the upper surface of the transverse ruler, the first hook is arranged in the first chute in an adaptive manner, and the first hook can slide in the first chute.
  10. 10. The cable-stayed bridge dynamic simulation demonstration model according to claim 1, wherein at least one level bubble is arranged on the transverse ruler and used for representing the horizontal state of the transverse ruler and representing whether the transverse ruler is in the horizontal state or not in the process of dynamically simulating the deflection movement of the transverse ruler.
  11. 11. The cable-stayed bridge dynamic simulation demonstration model of claim 1, wherein the surface of the transverse ruler is further provided with scale marks and scale values for visually representing the moving position of the first hook.
  12. 12. The dynamic simulation demonstration model of a cable-stayed bridge according to any one of claims 1 to 11, wherein when the driving pulley rotates to wind the oblique stay cord, the cable-stayed cord is pulled to wind around the first pulley and the second pulley in turn and wound on the driving pulley, and the transverse ruler is pulled to swing in the lifting direction.
  13. 13. The model of any one of claims 1 to 11, wherein when the driving pulley rotates to release the cable-stayed rope, the cable-stayed rope wound on the driving pulley sequentially bypasses the second pulley and the first pulley to release towards the first hook on the transverse ruler, so as to drive the transverse ruler to swing in the descending direction.
  14. 14. The cable-stayed bridge dynamic simulation demonstration model according to any one of claims 1 to 11, further comprising a control system connected to the driving motor for controlling the operation of the driving motor.
  15. 15. A dynamic simulation demonstration model of a cable-stayed bridge according to any one of claims 1-11, further provided with a display device in data communication with the force sensor for displaying the measured force data and/or the force variation.

Description

Dynamic simulation demonstration model of cable-stayed bridge Technical Field The utility model relates to the technical field of teaching simulation instruments and equipment, in particular to a dynamic simulation demonstration model of a cable-stayed bridge. Background The cable-stayed bridge is a typical bridge structure, mainly comprising a girder, a bridge tower and stay cables, wherein the girder is directly pulled on the bridge tower by the stay cables to construct a bridge. The main girder is a main structural part for bearing the load of vehicles and the like, and has various forms, such as a steel box girder, a concrete box girder and the like. The bridge tower is an important supporting structure of the cable-stayed bridge, is generally towered at two ends or in the middle of the bridge, and is made of reinforced concrete or steel materials. The stay cables are key components for connecting the bridge tower and the main beams, are in various radial or harp-shaped arrangement forms and the like, and transmit the load of the main beams to the bridge tower. At present, in the teaching scientific research and science popularization demonstration activities aiming at the cable-stayed bridge design and construction, a structural model with reduced equal proportion is used, the cable-stayed bridge is manufactured by materials such as wood, plastics and metal, for example, the outer shells of a girder and a bridge tower are manufactured by plastics, the structural strength of the cable-stayed bridge is enhanced by a metal framework, a high-strength steel wire or nylon rope is used for the cable-stayed bridge according to a certain proportion, the cable-stayed bridge is precisely measured and reduced, and then the corresponding materials are used for fine processing and fixed assembly to form the structural model, so that the real structural mode and form of the cable-stayed bridge, including the whole appearance, the structural detail and the connection relation among all parts of the cable-stayed bridge, are more vividly and intuitively displayed, the space form and the structure of the cable-stayed bridge can be better known, but the bonded and fixed structure can not be dynamically simulated and demonstrated, for example, the change conditions such as the girder, the dynamic load and the like can not be dynamically demonstrated, and the principle and the mechanical property of the cable-stayed bridge are still limited to a certain extent. Disclosure of utility model In view of the defects and shortcomings of the prior art, the utility model aims to provide a dynamic simulation demonstration model of a cable-stayed bridge, which comprises a base, a transverse ruler, an oblique stay rope, a driving motor and a force sensor; the upper surface of the base is fixedly provided with an upright rod extending upwards; The transverse ruler is characterized in that a rotatable installation relation is formed between one end of the transverse ruler and the upright rod, a first hook is arranged on the transverse ruler, and the first hook is connected with the tail end of the oblique stay rope and can be pulled by the oblique stay rope, so that the transverse ruler performs deflection movement around the installation position of the transverse ruler in space; the cable-stayed rope is arranged to be connected to the output end of the driving motor through a pulley block, and the pulley block comprises a first pulley arranged in the top direction of the vertical rod and a second pulley arranged in the bottom direction of the vertical rod; The output shaft of the driving motor is connected with a driving pulley, and the driving pulley is driven to synchronously rotate by the rotation of the driving motor; The cable-stayed rope extends from the first hook to bypass the first pulley and the second pulley in turn, further extends to the driving pulley and can be wound or released around the driving pulley when the driving pulley rotates clockwise or anticlockwise; The second pulley is also connected with a force sensor, and the force sensor is used for detecting the force born by the second pulley in real time to represent the tension of the inclined pull rope so as to dynamically simulate the tension state change of the inclined pull rope influenced by the dead weight of the transverse ruler; The longitudinal direction of the transverse ruler, which is arranged on the upright rod and is in a horizontal state, is taken as an x direction, the direction of the rotation axis of the first pulley is a y direction perpendicular to the x direction, and the direction of the rotation axis of the second pulley is a y direction perpendicular to the x direction; the rotating axis of the first pulley is parallel to the rotating axis of the second pulley, and the first pulley, the second pulley and the transverse ruler are positioned on the same side of the vertical rod; The direction of the rotation axis of the driving pulley is para