Main beam transverse ruler and cable-stayed bridge simulation demonstration model with same

Abstract

The utility model provides a main beam transverse ruler and a cable-stayed bridge simulation demonstration model with the same, and the main beam transverse ruler comprises a transverse ruler main body which defines a cuboid structure; a first sliding groove and a second sliding groove in the lengthwise direction of the transverse ruler body are formed in the upper surface and the lower surface of the transverse ruler body respectively, and a first hook is arranged in the first sliding groove in a sliding mode. A second hook is arranged in the second sliding groove in a sliding mode. Scale marks and / or scale values are arranged on the side face of the transverse ruler body. The cable-stayed bridge simulation demonstration model comprises a base, a main beam transverse ruler, a cable-stayed rope, a driving motor and a force sensor; the inclined pulling rope is wound or released around the driving pulley when the driving pulley rotates, so that the main beam transverse ruler is driven to swing, and the change of the pulling force is measured and represented. Therefore, the influence of the dead weight of the transverse ruler in the swinging process and the tension state change of the inclined pull rope at different positions are dynamically simulated. A movable weight is arranged below the transverse ruler of the main beam as a load to dynamically demonstrate the tension dynamic change of the inclined pull rope under the conditions of the self weight of the transverse ruler and the load.

Description

Technical Field

[0001] This utility model relates to the field of teaching simulation instruments and equipment technology, specifically to a main beam crossbar and a cable-stayed bridge simulation demonstration model having the crossbar. Background Technology

[0002] A cable-stayed bridge is a typical bridge structure, mainly composed of three parts: the main girder, the towers, and the stay cables. The main girder is directly connected to the towers by the stay cables to construct the bridge. The main girder is the primary structural component bearing loads such as those from vehicles, and it comes in various forms, including steel box girders and concrete box girders. The towers are crucial supporting structures of a cable-stayed bridge, typically towering at both ends or in the middle of the bridge, and are usually made of reinforced concrete or steel. The stay cables are the key components connecting the towers and the main girder; they are arranged in various ways, such as radially or harp-shaped, transferring the load of the main girder to the towers.

[0003] Currently, in teaching, research, and popular science demonstrations related to the design and construction of cable-stayed bridges, scaled-down structural models are used. These models are made from materials such as wood, plastic, and metal. For example, plastic is used to make the outer shell of the main beam and bridge towers, while a metal skeleton is used internally to enhance structural strength. High-strength steel wire or nylon rope is used for the stay cables. The cable-stayed bridge is precisely measured and scaled down according to a certain proportion, and then finely processed and fixedly assembled into a structural model using appropriate materials. This model realistically and intuitively demonstrates the actual structural method and form of cable-stayed bridges, including the overall appearance, structural details, and connection relationships between various parts. It helps to provide a clearer understanding of the spatial form and construction of cable-stayed bridges. However, bonded and fixed structures cannot be dynamically simulated and demonstrated. For example, it is impossible to dynamically demonstrate changes in the main beam of the bridge or dynamic loads. Therefore, there are still certain limitations in dynamically demonstrating the principles and mechanical properties of cable-stayed bridges. Utility Model Content

[0004] In view of the defects and shortcomings of the existing technology, the purpose of this utility model is to provide a main beam crossbar for a dynamic simulation model of a cable-stayed bridge, comprising:

[0005] The main body of the ruler is defined as a cuboid structure;

[0006] A first groove is provided on the upper surface of the ruler body along the longitudinal direction of the ruler body, and at least one first hook is slidably disposed in the first groove.

[0007] A second groove, extending along the longitudinal direction of the ruler body, is provided on the lower surface opposite to the main body of the ruler; at least one second hook is slidably disposed within the second groove; and

[0008] The ruler body has scale lines and / or scale values ​​on at least one side.

[0009] As an optional embodiment, the relative positions of the first slide and the second slide are designed to be symmetrical.

[0010] As an optional embodiment, the first slide and the second slide have the same dimensions.

[0011] As an optional embodiment, the main body of the ruler is characterized in that at least one side is provided with a spirit level.

[0012] According to a second aspect of the present invention, a simulation demonstration model of a cable-stayed bridge is also proposed, including the aforementioned main beam crossbar, as well as a base, cable stays, a drive motor, and a force sensor;

[0013] An upwardly extending upright is fixed to the upper surface of the base;

[0014] One end of the main beam crossbar is rotatably mounted to the upright. A first hook is provided on the main beam crossbar. The first hook is connected to the end of the inclined rope and can be pulled by the inclined rope, so that the main beam crossbar can swing around the installation position in space.

[0015] The inclined cable is configured to be connected to the output end of the drive motor via a pulley system; the pulley system includes a first pulley located at the top of the pole and a second pulley located at the bottom of the pole.

[0016] The output shaft of the drive motor is connected to a drive pulley, and the rotational motion of the drive motor drives the drive pulley to rotate synchronously.

[0017] The inclined cable extends from the first hook, passes successively around the first pulley and the second pulley, and then extends further to the drive pulley. It can wrap around or release the drive pulley when the drive pulley rotates clockwise or counterclockwise.

[0018] The second pulley is also connected to a force sensor, which is used to detect the force on the second pulley in real time to characterize the tension of the cable, so as to dynamically simulate the change of tension state of the cable under the influence of the weight of the main beam.

[0019] At least one second hook is provided with a load weight.

[0020] As an optional embodiment, the angled pull rope is located in the same plane from the fixed connection point of the first hook, the position around the first pulley, and the position around the second pulley.

[0021] As an optional embodiment, the drive motor is mounted on the upright via a motor mounting bracket and is located below the installation position of the main beam crossbar;

[0022] Relative to the installation position of the main beam crossbar, the second pulley is located on the same side as the drive motor, below the main beam crossbar;

[0023] The first pulley is located above the crossbar of the main beam.

[0024] As an optional embodiment, the bubble level set on the main beam crossbar can visually indicate whether the main beam crossbar is in a horizontal state during the dynamic simulation of the main beam crossbar's swaying motion.

[0025] As an optional embodiment, the main beam crossbar is installed onto the upright through a perforated fixing block;

[0026] The perforated fixing block is fitted onto the upright. The first knob passes through the main beam crossbar and the side wall of the perforated fixing block, thereby screwing into the perforated fixing block and tightening it against the upright, thus fixing the position of the perforated fixing block on the upright.

[0027] As an optional embodiment, the head of the first knob is provided with threads to engage with the threaded hole on the side wall of the perforated fixing block and tighten it.

[0028] The waist of the first knob has a smooth surface, allowing the main beam crossbar to rotate freely around it.

[0029] As an optional embodiment, the tensile force data detected by the force sensor can be output via wired or wireless transmission.

[0030] As an optional embodiment, when the drive pulley rotates and the inclined rope is tightened, the inclined rope is pulled to pass around the first pulley and the second pulley in sequence and wrap around the drive pulley, thereby pulling the main beam crossbar to swing in the lifting direction.

[0031] As an optional embodiment, when the drive pulley rotates and the inclined rope is released, the inclined rope wound on the drive pulley passes around the second pulley and the first pulley in sequence and is released toward the first hook on the main beam crossbar, thereby causing the main beam crossbar to swing in the downward direction.

[0032] As an optional embodiment, the cable-stayed bridge simulation demonstration model is also equipped with a control system connected to the drive motor for controlling the operation of the drive motor.

[0033] As an optional embodiment, the cable-stayed bridge simulation demonstration model is also equipped with a display device that communicates with the force sensor data to display the measured force data and / or force changes.

[0034] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below may be considered part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other. Furthermore, all combinations of the claimed subject matter are considered part of the utility model subject matter of this disclosure.

[0035] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0036] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0037] Figure 1 This is a three-dimensional view of a simulation demonstration model of a cable-stayed bridge according to an embodiment of the present utility model.

[0038] Figure 2 This is a perspective view of a cable-stayed bridge simulation demonstration model according to an embodiment of the present invention.

[0039] Figure 3 This is a three-dimensional view of the main beam crossbar of a cable-stayed bridge simulation demonstration model according to an embodiment of this utility model.

[0040] Figure 4 This is a schematic diagram of the main beam crossbar installation structure of a cable-stayed bridge simulation demonstration model according to an embodiment of this utility model.

[0041] Figure 5 This is a front view of a cable-stayed bridge simulation demonstration model according to an embodiment of the present utility model (control system 1000 is not identified).

[0042] Figure 6 This is a schematic diagram of the dynamic changes in the cable-stayed position of a simulation demonstration model of a cable-stayed bridge according to an embodiment of this utility model (control system 1000 is not identified).

[0043] Figure 7 This is an assembly diagram of a cable-stayed bridge simulation demonstration model according to an embodiment of the present invention (control system 1000 is not identified).

[0044] Figure 8 It is based on Figure 7 The example shows a magnified view of location A in the simulation demonstration model of the cable-stayed bridge.

[0045] Figure 9 This is an assembly diagram of the clamping mechanism of a cable-stayed bridge simulation demonstration model according to an embodiment of the present utility model (control system 1000 is not identified).

[0046] Figure 10 It is based on Figure 9The example shows a magnified view of location B in the simulation model of the cable-stayed bridge.

[0047] Figure 11 It is based on Figure 9 The example shows a magnified view of position C in the simulation demonstration model of the cable-stayed bridge.

[0048] Figure 12 This is a schematic diagram of another embodiment of the cable-stayed bridge simulation demonstration model according to the present utility model.

[0049] Figure 13 This is a front view of another embodiment of the cable-stayed bridge simulation demonstration model according to the present utility model.

[0050] Figure 14 This is a schematic diagram of the load position change of a cable-stayed bridge simulation demonstration model according to an embodiment of the present invention. Detailed Implementation

[0051] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0052] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments disclosed herein are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed herein are not limited to any particular implementation. Furthermore, some aspects of the present invention can be used alone or in any suitable combination with other aspects disclosed herein.

[0053] {Example 1}

[0054] Combination Figures 1 to 11 As shown, the cable-stayed bridge simulation demonstration model according to an embodiment of the present invention includes a base 100, a main beam crossbar 200, cable stays 300, a drive motor 400, a force sensor 500, and a control system 1000.

[0055] The base 100 serves as the bottom support mechanism, used to support the entire cable-stayed bridge simulation demonstration model.

[0056] As shown in the figure, the main beam crossbar 200, the inclined rope 300, the drive motor 400, and the force sensor 500 are supported on the base 100.

[0057] An upwardly extending upright post 110 is fixed to the upper surface of the base 100.

[0058] One end of the main beam crossbar 200 is rotatably mounted to the upright 110.

[0059] As shown in the attached figure, a first hook 220 is provided on the main beam crossbar 200. The first hook 220 is connected to the end of the inclined rope 300 and can be pulled by the inclined rope 300, so that the main beam crossbar 200 swings around the installation position of the crossbar in space.

[0060] The inclined cable 300 is designed to be connected to the output end of the drive motor 400 via a pulley system. The pulley system includes a first pulley 410 located at the top of the upright 110 and a second pulley 420 located at the bottom of the upright 110.

[0061] The drive motor 400 is mounted on the upright 110 via the motor mounting bracket 401 and is located below the installation position of the main beam crossbar 200.

[0062] As shown in the attached diagram, relative to the installation position of the main beam crossbar 200, the second pulley 420 and the drive motor 400 are located on the same side, below the main beam crossbar 200; the first pulley 410 is located above the main beam crossbar 200.

[0063] like Figure 2 , Figure 7 , Figure 8 As shown, the motor mounting bracket 401 is fixedly connected to a fixing block 402. The fixing block 402 is fitted onto the upright 110 and tightened with bolts to fix its position.

[0064] The output shaft of the drive motor 400 is connected to a drive pulley 430, and when the drive motor 400 rotates, it can drive the drive pulley 430 to rotate synchronously.

[0065] Combination Figure 2 , Figure 7 , Figure 8 As shown, in the vertical direction along the upright 110, the drive pulley 430 is closer to the main beam crossbar 200 relative to the second pulley 420. As shown, the drive pulley 430 is located vertically between the second pulley 420 and the main beam crossbar 200.

[0066] Combination Figure 1 , Figure 2 , Figure 7 As shown, the end of the inclined rope 300 is connected to the main beam crossbar 200, specifically by fastening the inclined rope with a first hook provided on the main beam crossbar 200.

[0067] Figure 3The example illustrates a main beam crossbar 200. The upper surface of the main beam crossbar 200 has a first groove 210, which is rectangular along the longitudinal length of the crossbar. A first hook 220, capable of sliding, is fitted into the first groove 210. The end of the aforementioned diagonal cable 300 is fastened to the first hook 220, forming a fixed connection.

[0068] like Figure 3 In the embodiment shown, the main beam crossbar 200 has a crossbar body, defining a cuboid structure, which can be made of aluminum alloy, wood, steel, etc.

[0069] A first groove 210 is provided on the upper surface of the ruler body along the longitudinal direction of the ruler body, and at least one first hook 220 is slidably disposed in the first groove 210.

[0070] A second groove 240 is provided on the lower surface opposite to the main body of the ruler along the longitudinal direction of the main body of the ruler, and at least one second hook 250 is slidably disposed in the second groove 240.

[0071] The second hook 250 can be hung on the load weight 250.

[0072] Alternatively, the first and second slides can be designed with symmetrical relative positions.

[0073] Alternatively, the first groove and the second groove may be the same size.

[0074] Therefore, combined Figure 5 , Figure 6 As shown, the first hook 220 can slide to different positions within the first groove 210 to dynamically simulate the state of the stay rope pulling the main beam crossbar from different positions, and the tension state of the stay rope is detected in real time by a force sensor to achieve dynamic simulation.

[0075] Furthermore, combined Figure 12 , Figure 13 , Figure 14 As shown, the second hook 250 can slide to different positions within the second slide groove 410 to dynamically simulate the dynamic influence of loads at different positions combined with the self-weight of the main beam crossbar on the tension of the stay rope. The tension state of the stay rope is detected in real time by a force sensor to achieve dynamic simulation.

[0076] In an embodiment of the utility model, the load weight 250 is replaceable, for example, by mounting weights of different masses to simulate the effects of loads of different masses.

[0077] Combination Figure 1 , Figure 2 , Figure 7 , Figure 8As shown, the inclined rope 300 extends from the first hook 220, passes through the first pulley 410 and the second pulley 420 in sequence, and then extends upward to the drive pulley 430. It can wrap around or release the drive pulley 430 when the drive pulley 430 rotates clockwise or counterclockwise.

[0078] In a further alternative embodiment, the head end of the inclined rope 300 is fixed to the drive pulley 430 and wound or released around its rotation direction relative to the end of the inclined rope 300.

[0079] Combination Figure 1 , Figure 2 , Figure 8 As shown, when the drive pulley 430 rotates and the inclined rope 300 is tightened, the inclined rope 300 is pulled to pass through the first pulley 410 and the second pulley 420 in sequence and wrap around the drive pulley 430, which pulls the main beam crossbar 200 to swing in the lifting direction.

[0080] Similarly, when the drive pulley 430 rotates, causing the stay rope 300 to release, the stay rope 300 wound around the drive pulley 430 successively passes through the second pulley 420 and the first pulley 410 and is released towards the first hook 200 on the main beam crossbar, thereby causing the main beam crossbar 200 to swing downwards. This dynamically simulates the change in tension of the stay rope under the influence of the main beam crossbar's own weight during the swing.

[0081] Combination Figure 5 , Figure 6 As shown, the first hook 220 can slide to different positions within the first groove 210, thereby simulating the change in tension state of the stay rope under the influence of the weight of the main beam at different positions.

[0082] This enables the dynamic simulation of the main beam crossbar, which serves as the main beam of a cable-stayed bridge, simulating the cable stays' tension on the main beam and its dynamic changes.

[0083] Combination Figure 1 , Figure 3 As shown, at least one level bubble 230 is provided on the main beam crossbar 200 to indicate the horizontal state of the main beam crossbar. Thus, during the dynamic simulation of the main beam crossbar's swaying motion, the level bubble can visually represent whether the main beam crossbar is in a horizontal state.

[0084] Combination Figure 1 , Figure 3 As shown, at least one side of the main beam crossbar 200 is also provided with scale lines and scale values ​​for visualization, which facilitates the intuitive observation of the movement position of the first hook during dynamic simulation and is beneficial for torque research and calculation.

[0085] As an alternative embodiment, the main beam crossbar 200 is mounted to the upright 110 via a perforated fixing block 201.

[0086] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the perforated fixing block 201 is fitted onto the upright 110. The first knob 202 passes through the main beam crossbar 200 and the side wall of the perforated fixing block 201, thereby screwing into the perforated fixing block 201 and pressing against the upright 110 to tighten it, thus fixing the position of the perforated fixing block 201 on the upright 110.

[0087] In this embodiment, the head of the first knob 202 is threaded to engage with the threaded hole on the side wall of the through-hole fixing block 201 for tightening. The waist of the first knob 202 is a smooth surface, allowing the main beam crossbar 200 to rotate freely around it.

[0088] Combination Figure 1 , Figure 2 , Figure 8 As shown, in an optional embodiment, the first pulley 410 is mounted and fixed to the top of the upright 110 via the first clamping mechanism 120. The second pulley 420 is fixedly mounted to the bottom of the upright 110 via the second clamping mechanism 130.

[0089] In a preferred embodiment, a force sensor 500 is also provided on the second clamping mechanism 130, installed below and connected to the second pulley 420, so that the force sensor 500 can detect the force on the second pulley that the inclined rope 300 passes over in real time and characterize the tension of the inclined rope, thereby dynamically simulating the change of the tension state of the inclined rope under the influence of the weight of the horizontal ruler in different positions and under different states.

[0090] As an optional embodiment, the tensile force data detected by the force sensor 500 can be output via wired or wireless transmission.

[0091] As an optional embodiment, the control system 1000 of the cable-stayed bridge simulation demonstration model is electrically connected to the drive motor via a control cable and is configured to control the operation of the drive motor 400, including operations such as start / stop / forward / reverse rotation.

[0092] The control system 1000 can also be configured to connect to the aforementioned force sensor 500 via a cable, receive the detected tensile force data transmitted by the force sensor 500, and visualize it through a display device, so that the force value and changes can be observed intuitively during the dynamic demonstration of the cable-stayed bridge simulation model.

[0093] As an optional embodiment, the detected tensile data can also be analyzed over time to plot a force-time curve, allowing for a direct observation of the force values ​​and trends.

[0094] As an optional embodiment, the aforementioned control system 1000 is designed to be implemented in the manner of a host computer, for example, in a computer system with data communication, data processing and display functions, including desktop computers, laptops, handheld computers, smart computing terminals, embedded computer systems, etc.

[0095] As an optional embodiment, the aforementioned control system 1000 can also be designed in the form of a control box, such as... Figure 1 , Figure 2 As shown, it is installed on the upper surface of the base 100.

[0096] Combination Figure 1 , Figure 2 As shown, the control box is equipped with at least a power input port, a signal input port, control buttons 1002, and a display device 1003. The display device 1003 can be a digital tube, LED, or LCD display to display the measured force value. The power input port is connected to an external power source to supply power to the control box. The signal input port establishes a data communication channel with the force sensor 500 via a cable or wireless transmission link, receives the sensing data from the force sensor 500, and displays the detected force value on the display device 1003.

[0097] exist Figure 2 In the example shown, the power input port and signal input port are integrated into one input port 1001, and the power cable and signal cable are threaded through one physical input port into the control box.

[0098] It should be understood that the drive motor 400 can be powered by an independent power supply circuit or by power supply through the control box.

[0099] {Example 2}

[0100] Combination Figure 2 , Figure 6 , Figure 7 , Figure 8 As shown, taking the longitudinal direction of the main beam crossbar 200 installed on the upright 200 and in a horizontal state as the x-direction, the direction of the rotation axis of the first pulley 410 is the y-direction perpendicular to the x-direction, and the direction of the rotation axis of the second pulley 420 is the y-direction perpendicular to the x-direction.

[0101] Combination Figure 8 As shown, the rotation axis of the first pulley 410 is parallel to the rotation axis of the second pulley 420, and the first pulley 410, the second pulley 420 and the main beam crossbar 200 are located on the same side of the upright 110.

[0102] Combination Figure 8 As shown, the direction of the rotation axis of the drive pulley 430 is parallel to the x-axis.

[0103] The distance d1 between the first pulley 410 and the center line of the upright 110 along the x-direction, and the distance d2 between the second pulley 420 and the center line of the upright 110 along the x-direction, satisfy: d1 = d2.

[0104] The distance d3 between the first pulley 410 and the center line of the upright 110 along the y direction, and the distance d4 between the second pulley 420 and the center line of the upright 110 along the y direction, satisfy: d3 = d4.

[0105] Therefore, the angled pull rope 300 is located in the same plane from the fixed connection point of the first hook, the position passing through the first pulley 410, and the position passing through the second pulley 420.

[0106] Combination Figure 8 As shown, the tangents of the inclined rope 300 in the direction of entering and exiting the second pulley are parallel to each other.

[0107] Combination Figure 2 , Figure 8 As shown, based on the rotation axis of the drive pulley 430 and the rotation axis of the second pulley 420, the tangent at the connection point of the inclined rope 300 and the drive pulley 430 is aligned with the tangent at the point where the inclined rope 300 passes through the second pulley 420 and enters the drive pulley 430.

[0108] Therefore, in the process of dynamically simulating the changes in the tension state of the stay cables of a cable-stayed bridge, the accuracy and intuitiveness of the force measurement data from the sensors are ensured.

[0109] {Example 3}

[0110] Combination Figure 1 , Figure 2 , Figure 8 , Figures 9-11 As shown, the first clamping mechanism 120 and the second clamping mechanism 130 adopt the same structural design. Combined with... Figure 10 As shown, the first clamping mechanism 120 is used as an example for illustrative purposes.

[0111] like Figure 10 In the example shown, the first clamping mechanism 120 includes a clamping body 121 sleeved onto the outer surface of the upright 110. On a pair of opposite side directions of the upright 110, the clamping body 121 is provided with a first clamping knob 123 and a second clamping knob 124 facing each other, which can be tightened and released respectively.

[0112] At least one corner anti-slip component 122 is provided between the clamping body 121 and the upright 110, such as Figure 10 As shown, the corner anti-slip component 122 is designed with an L-shaped structure and is located on one side of the second clamping knob 124, holding the upright 110.

[0113] like Figure 10 As shown, the clamping body 121 on the side where the second clamping knob 124 is located is also provided with an L-shaped anti-rotation component 125, which holds the pulley mounting shaft 126. After the second clamping knob 124 passes through the pulley mounting shaft 126 and the L-shaped anti-rotation component 125, it further tightens the clamping body 121 until it abuts against the corner anti-slip component 122. By tightening the first clamping knob 123 and the second clamping knob 124 on both sides, clamping and fixing are achieved.

[0114] As shown in the figure, the first pulley 410 is installed at the end of the pulley mounting shaft 126 of the first clamping mechanism 120.

[0115] like Figure 11 As shown, the end of the pulley mounting shaft 126 of the second clamping mechanism 130 is set horizontally to securely mount the force sensor 500. A vertical mounting shaft is mounted above the force sensor 500, and the second pulley 420 is mounted at the end of the vertical mounting shaft.

[0116] {Example 4}

[0117] Combination Figure 12 , Figure 13 , Figure 14 As shown, a simulation demonstration model of a cable-stayed bridge according to another embodiment is presented, further combined with the attached... Figure 3 As shown, a load weight 260 is hung below the main beam crossbar 200 via a second hook 250. The second hook 250 and the load weight 260 can slide to different positions within the second slide groove 240 to dynamically demonstrate the dynamic change of the tension of the inclined rope under the conditions of the crossbar's own weight and the load weight.

[0118] In some embodiments, the load weight 260 can be replaced, for example, by selecting weights of different masses to hang on the second hook 250, to simulate the effect of loads of different masses combined with the self-weight of the main beam crossbar on the tension of the stay rope.

[0119] As mentioned above, real-time monitoring and output via force sensors, along with visual representation, facilitates on-site teaching and demonstration activities.

[0120] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A main beam crossbar for a dynamic simulation model of a cable-stayed bridge, characterized in that, include: The main body of the ruler is defined as a cuboid structure; A first groove is provided on the upper surface of the ruler body along the longitudinal direction of the ruler body, and at least one first hook is slidably disposed in the first groove. A second groove is provided on the lower surface opposite to the main body of the ruler along the longitudinal direction of the main body of the ruler, and at least one second hook is slidably disposed in the second groove; as well as The ruler body has scale lines and / or scale values ​​on at least one side.

2. The main beam crossbar of the dynamic simulation model of a cable-stayed bridge according to claim 1, characterized in that, The first and second slides are designed with symmetrical relative positions.

3. The main beam crossbar of the dynamic simulation model of a cable-stayed bridge according to claim 1, characterized in that, The first slide groove and the second slide groove have the same dimensions.

4. The main beam crossbar of the dynamic simulation model of a cable-stayed bridge according to any one of claims 1-3, characterized in that, The main body of the horizontal ruler has a level bubble on at least one side.

5. A simulation demonstration model of a cable-stayed bridge, characterized in that, Including the main beam crossbar as described in any one of claims 1-4, it also includes a base, a tie rope, a drive motor, and a force sensor; An upwardly extending upright is fixed to the upper surface of the base; One end of the main beam crossbar is rotatably mounted to the upright. A first hook is provided on the main beam crossbar. The first hook is connected to the end of the inclined rope and can be pulled by the inclined rope, so that the main beam crossbar can swing around the installation position in space. The inclined cable is configured to be connected to the output end of the drive motor via a pulley system; the pulley system includes a first pulley located at the top of the pole and a second pulley located at the bottom of the pole. The output shaft of the drive motor is connected to a drive pulley, and the rotational motion of the drive motor drives the drive pulley to rotate synchronously. The inclined cable extends from the first hook, passes successively around the first pulley and the second pulley, and then extends further to the drive pulley. It can wrap around or release the drive pulley when the drive pulley rotates clockwise or counterclockwise. The second pulley is also connected to a force sensor, which is used to detect the force on the second pulley in real time to characterize the tension of the cable, so as to dynamically simulate the change of tension state of the cable under the influence of the weight of the main beam. At least one second hook is provided with a load weight.

6. The cable-stayed bridge simulation demonstration model according to claim 5, characterized in that, The angled pull rope is located in the same plane from the fixed connection point of the first hook, the position after passing the first pulley, and the position after passing the second pulley.

7. The cable-stayed bridge simulation demonstration model according to claim 5, characterized in that, The drive motor is mounted on the upright via a motor mounting bracket and is located below the installation position of the horizontal ruler; Relative to the installation position of the horizontal ruler, the second pulley is located on the same side as the drive motor and is located below the horizontal ruler; the first pulley is located above the horizontal ruler.

8. The cable-stayed bridge simulation demonstration model according to claim 5, characterized in that, The spirit level is set on the crossbar of the main beam.

9. The cable-stayed bridge simulation demonstration model according to claim 5, characterized in that, The main beam crossbar is installed onto the upright through a perforated fixing block; The perforated fixing block is fitted onto the upright. The first knob passes through the main beam crossbar and the side wall of the perforated fixing block, thereby screwing into the perforated fixing block and tightening it against the upright, thus fixing the position of the perforated fixing block on the upright.

10. The cable-stayed bridge simulation demonstration model according to claim 9, characterized in that, The head of the first knob is threaded to engage with the threaded hole on the side wall of the perforated fixing block for tightening; The waist of the first knob has a smooth surface, allowing the main beam crossbar to rotate freely around it.

11. The cable-stayed bridge simulation demonstration model according to claim 5, characterized in that, The tensile force data detected by the force sensor can be output via wired or wireless transmission.

12. The cable-stayed bridge simulation demonstration model according to any one of claims 5-11, characterized in that, When the drive pulley rotates and the stay rope is tightened, the stay rope is pulled to pass through the first pulley and the second pulley in sequence and then wrap around the drive pulley, pulling the main beam crossbar to swing in the lifting direction.

13. The cable-stayed bridge simulation demonstration model according to any one of claims 5-11, characterized in that, When the drive pulley rotates and the cable is released, the cable wound around the drive pulley passes through the second pulley and the first pulley in sequence and is released toward the first hook on the main beam crossbar, thereby causing the main beam crossbar to swing in the downward direction.

14. The cable-stayed bridge simulation demonstration model according to any one of claims 5-11, characterized in that, The cable-stayed bridge simulation model is also equipped with a control system connected to the drive motor to control the operation of the drive motor.

15. The cable-stayed bridge simulation demonstration model according to any one of claims 5-11, characterized in that, The cable-stayed bridge simulation model is also equipped with a display device that communicates with the force sensor data to display the measured force data and / or force changes.

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