CN-122016463-A - Air-supported membrane structure dynamic load test simulation loading device and loading method thereof

Abstract

The invention discloses a dynamic load test simulation loading device and a loading method of an air-bearing membrane structure, belonging to the technical field of building structure mechanics analysis and calculation, comprising a loading device and a driving device, wherein the loading device comprises a metal frame, a tension sensor and a force transmission strip; the driving device comprises a servo controller, a servo motor, a servo electric cylinder, a button box, a speed regulation disc and a PLC (programmable logic controller), wherein the lower end of the metal frame is connected with the servo electric cylinder, the upper end of the metal frame is connected with a tension sensor, the tension sensor is connected with a strip, and the upper end of the strip is connected with a film material through a loop, so that the influence of simulated dynamic load on the performance of the film material and dynamic response among cable films are realized. The invention provides a high-efficiency and accurate technical means for design optimization and safety evaluation of the passive load of the air bearing type die structure.

Inventors

• ZHANG ZHEN
• YANG JIACHI
• WANG WEI
• LI XIONGYAN
• XUE SUDUO

Assignees

• 北京工业大学

Dates

Publication Date

20260512

Application Date

20260126

Claims (8)

1. 1. The air bearing type film structure dynamic load test simulation loading device and loading method are characterized by comprising a loading device and a driving device The loading device comprises a cable net (1), a film surface (2), a flexible force transmission strip (3), a tension sensor (4) and a metal frame (5), wherein the tension sensor (4) is connected to the metal frame (5), the tension sensor (4) is connected with the film surface (2) through the flexible force transmission strip (3), and the film surface (2) is provided with the cable net (1); The driving device comprises a transmission rod (6), wherein a metal frame (5) is fixed on the transmission rod (6), the transmission rod is driven by a servo electric cylinder (7) and is controlled to drive by a cylinder magnetic switch sensor (8) to limit the upper and lower parts, the transmission speed of the transmission rod (6) is regulated by a servo controller (11), and the servo controller (11) manually regulates the speed through a speed regulation disc (10) and simultaneously controls the start or pause and the upper or lower instructions through a PLC (13).
2. 2. The air bearing type membrane structure dynamic load test simulation loading device according to claim 1, wherein the transmission rod (6) is embedded into the servo electric cylinder (7), the servo electric cylinder (7) controls the upper limit and the lower limit of the transmission rod (7) transmission through the cylinder magnetic switch sensor (8), the servo electric cylinder (7) is connected with the servo motor (14), and the servo motor (14) is controlled by the servo controller (11) to react.
3. 3. The air bearing type membrane structure dynamic load test simulation loading device according to claim 1, wherein the PLC (13) controls the switch, the direction and other instructions through a button box (9), the PLC (13) converts a power supply current into a receivable current through a current converter (12), and the current converter (12) is directly connected with a power supply.
4. 4. The simulated loading device for the dynamic load test of the air-supported membrane structure according to claim 1, wherein the side surface of the tension sensor (4) is connected with a wire, and the tension time course curve is directly transmitted into a computer.
5. 5. The air bearing type membrane structure dynamic load test simulation loading device according to claim 1, wherein the cylinder magnetic switch sensor (8) transmits a command through the PLC (13), so that upper and lower limit information of the transmission rod (6) is transmitted to the servo electric cylinder (7), and the position of the transmission rod (6) is limited.
6. 6. An air-supported membrane structure dynamic load test simulation loading device according to claim 3, wherein the button box (9) comprises a switch key, a start key, an up or down key and a manual and automatic switch key.
7. 7. The air bearing type membrane structure dynamic load test simulation loading device and the application method thereof according to claim 1 are characterized in that the servo controller (11) and the PLC (13) work cooperatively, target dynamic load parameter limit values are set manually, the servo controller and the air bearing type membrane structure dynamic load test simulation loading device are matched with the air cylinder magnetic switch sensor (8) within the limit value range, amplitude and frequency information of target dynamic load are regulated reasonably, and dynamic load simulation tests are carried out through different wave spectrums and speeds.
8. 8. A method of simulated loading of a dynamic load of an air-supported membrane structure based on the apparatus of any one of claims 1 to 7, the method comprising the steps of: S1, determining a position to be loaded in an air bearing type membrane structure model, and reliably connecting a flexible force transmission strip (3) with a model membrane surface (2); S2, setting target dynamic load parameters through an upper computer or a button box (9), wherein the parameter settings comprise the following contents: The amplitude is controlled by the cylinder magnetic switch sensor (8), and the cylinder magnetic switch sensor (8) automatically controls the displacement of the transmission rod (6) after receiving the instructions of the PLC (13) and the servo controller (11), so as to limit the dynamic load amplitude; The frequency is manually operated on the button box (9), the PLC (13) and the servo controller (11) receive instructions and work cooperatively to adjust the speed and control the loading frequency of the dynamic load; The waveform is controlled by the position of the cylinder magnetic switch sensor (8), and the cylinder magnetic switch sensor (8) receives the instruction of the PLC (13) to control the transmission distance and the transmission speed of the transmission rod (6), so that the waveform of dynamic load loading is controlled; S3, starting an air bearing type membrane structure dynamic load test simulation loading device, wherein a PLC (13) outputs a control signal according to set parameters to drive a servo electric cylinder (7) to act, and dynamic load is transmitted to a membrane surface (2) through a transmission rod (6) and a metal frame (5) by a flexible force transmission strip (3); S4, a tension sensor (4) monitors load tension response in real time, and data are synchronously acquired and transmitted to a computer for analysis and processing; And S5, stopping the test by using a switch key in the button box (9).

Description

Air-supported membrane structure dynamic load test simulation loading device and loading method thereof Technical Field The invention belongs to the technical field of civil engineering test equipment, and particularly relates to an air-bearing type membrane structure dynamic load test simulation loading device and a loading method thereof. Background The air bearing type membrane structure is used as a large-span space structure form and is widely applied to buildings such as stadiums, exhibition centers and the like due to light dead weight and attractive appearance. However, the structure is extremely sensitive to wind, snow and other dynamic loads, and dynamic response analysis is a key of structural safety design. At present, research means mainly depend on numerical simulation and wind tunnel tests. The geometrical nonlinearity, material nonlinearity and boundary nonlinearity coupling phenomenon are easy to generate during numerical simulation, so that a plurality of technical problems are brought to the traditional numerical simulation method, and the wind tunnel test has the limitations of high cost, long period, difficulty in realizing a similarity law and the like. Therefore, a special device capable of applying controllable and measurable dynamic load to the reduced scale model is developed, and the device has important engineering significance for in-depth research of dynamic performance of the air-bearing membrane structure and verification of a theoretical model. Disclosure of Invention The invention aims to provide a dynamic load test simulation loading device and a loading method for an air-supported membrane structure, and provides a novel device and a novel method for solving the dynamic load simulation problem for the air-supported membrane structure so as to solve the problems in the background technology. The invention aims at realizing the technical scheme that the air-supported membrane structure dynamic load test simulation loading device and the loading method comprise a loading device and a driving device The loading device comprises a cable net (1), a film surface (2), a flexible force transmission strip (3), a tension sensor (4) and a metal frame (5), wherein the tension sensor (4) is connected to the metal frame (5), the tension sensor (4) is connected with the film surface (2) through the flexible force transmission strip (3), and the film surface (2) is provided with the cable net (1); The driving device comprises a transmission rod (6), wherein a metal frame (5) is fixed on the transmission rod (6), the transmission rod is driven by a servo electric cylinder (7) and is controlled to drive by a cylinder magnetic switch sensor (8) to limit the upper and lower parts, the transmission speed of the transmission rod (6) is regulated by a servo controller (11), and the servo controller (11) manually regulates the speed through a speed regulation disc (10) and simultaneously controls the start or pause and the upper or lower instructions through a PLC (13). Further, the transmission rod (6) is embedded into the servo electric cylinder (7), the servo electric cylinder (7) controls the upper limit and the lower limit of the transmission rod (7) through the cylinder magnetic switch sensor (8), the servo electric cylinder (7) is connected with the servo motor (14), and the servo motor (14) is controlled by the servo controller (11) to react. Further, the PLC (13) controls the switch, the direction and other instructions through the button box (9), the PLC (13) converts the power supply current into the receivable current through the current converter (12), and the current converter (12) is directly connected with the power supply. Further, the side surface of the tension sensor (4) is connected with a wire, and the tension time course curve is directly transmitted into a computer. Further, the cylinder magnetic switch sensor (8) transmits instructions through the PLC (13), so that upper and lower limit information of the transmission rod (6) is transmitted to the servo electric cylinder (7), and the position of the transmission rod (6) is limited. Further, the button box (9) comprises a switch key, a start key, an up or down key and a manual and automatic switching key. Further, the servo controller (11) and the PLC (13) work cooperatively, the target dynamic load parameter limit value is set manually, the servo controller and the PLC are matched with the cylinder magnetic switch sensor (8) within the limit value range, the amplitude and the frequency information of the target dynamic load are regulated reasonably, and the simulation test of the dynamic load is carried out through different wave spectrums and speeds. On the other hand, the invention also provides a dynamic load simulation loading method of the air-supported membrane structure, which comprises the following steps: S1, determining a position to be loaded in an air bearing type membrane structure model, and reliably connect