Aqueduct earthquake resistance and disaster reduction system and method based on digital twinning

Abstract

The invention relates to the technical field of disaster prevention and reduction of civil engineering, in particular to an aqueduct earthquake resistance and disaster reduction system and method based on digital twinning, and the system comprises a data collection module, an earthquake early warning module, a control system, a gate valve control module, a notification module, a 3D visualization module and an aqueduct post-earthquake evaluation module. Through joint detection of the earthquake early warning module and the slave acquisition module, real-time acquisition of aqueduct operation state information and earthquake early warning information is realized, and before destructive earthquake waves arrive, the water quantity in the aqueduct is adjusted through the control module, so that the earthquake response of the aqueduct is minimum. By inputting monitoring data, manual inspection data and earthquake characteristic information into a control system, constructing an aqueduct digital twin model and performing earthquake response simulation, the safety state of the aqueduct structure after the earthquake can be accurately evaluated, so that a post-earthquake aqueduct structure processing scheme is quickly proposed, and a reference basis is provided for earthquake relief decision making.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering disaster prevention and mitigation, and in particular to an aqueduct earthquake-resistant disaster reduction system and method based on digital twins. Background Art

[0002] In recent years, my country has built a large number of water diversion projects. Aqueducts, as an overhead water-passing structure that crosses obstacles such as rivers, have been widely used. However, aqueduct structures usually have the characteristics of large spans and carrying large amounts of water. This "top-heavy" structure is very prone to instability and damage under earthquakes. Studies have shown that the water in the trough significantly affects the dynamic characteristics and dynamic response of the aqueduct structure. By adjusting the depth of the water in the trough, the seismic response of the aqueduct can be improved to a certain extent, achieving a shock-absorbing effect.

[0003] my country is located in an earthquake-prone zone. According to statistics, about 35% of the world's earthquakes above magnitude 7 occur in China. Faced with the threat of this natural disaster, the current seismic design of aqueducts is still mainly based on traditional strength seismic methods, including pseudo-static method, spectral analysis method and time history analysis method. However, with the continuous increase in earthquake intensity and aqueduct scale, the existing seismic design specifications are difficult to control construction costs while ensuring safety, especially in high-intensity earthquake areas. The surge in design costs brought about by traditional methods may even affect the implementation of the project, limiting the widespread application of aqueducts in high-intensity earthquake areas. It can be seen that at this stage, there is an urgent need to research and develop new technologies for seismic disaster reduction for aqueducts that are highly adaptable and cost-effective.

[0004] At the same time, as an emerging technology in the field of water conservancy engineering, digital twin technology has been applied in some reservoirs, pumping stations, channels and other buildings. This technology provides new solutions for engineering scheduling and structural safety monitoring by constructing virtual models corresponding to physical engineering, and has played a significant role in improving engineering safety and operational efficiency. However, digital twin technology has not yet been fully applied in the field of aqueduct seismic disaster reduction. Introducing this technology into the seismic disaster reduction research of aqueduct structures and constructing a digital virtual model that accurately maps the physical structure of the aqueduct can not only quickly simulate the post-earthquake behavior of the aqueduct, but also realize intelligent operation and maintenance, providing a new technical path for aqueduct seismic disaster reduction, and has great development potential and market prospects. Summary of the invention

[0005] The present invention aims to solve the problem that aqueducts are easily damaged by earthquakes and that existing seismic design methods lead to a surge in construction costs and insufficient reliability. The purpose is to provide an aqueduct seismic disaster reduction system and method based on digital twins, which improves the seismic performance of aqueducts through earthquake early warning, real-time monitoring, earthquake response simulation and dynamic control, while quickly assessing post-earthquake damage and providing intelligent repair suggestions.

[0006] The present invention is achieved through the following technical solutions:

[0007] An aqueduct earthquake-resistant disaster reduction system based on digital twins, comprising:

[0008] A data acquisition module, which is used to collect physical parameters and visual data of the aqueduct and transmit the collected data to the control system;

[0009] An earthquake early warning module is used to collect basic earthquake data and transmit the basic earthquake data to the control system;

[0010] A control system, which is used to integrate the basic earthquake data output by the earthquake early warning module and the aqueduct status data collected by the data acquisition module, perform earthquake response simulation and disaster level assessment based on the aqueduct digital twin model, and generate control instructions at the same time;

[0011] The gate valve control module is connected to the control system for communication, receives control instructions from the control system, and dynamically adjusts the water volume in the aqueduct;

[0012] The notification module is connected to the control system for receiving earthquake response simulation and disaster level assessment and sending the information to management personnel.

[0013] The aqueduct post-seismic assessment module is used to calculate and evaluate the safety status of the aqueduct building by integrating the digital twin model with on-site monitoring, manual inspection and other information after receiving the earthquake signal.

[0014] Furthermore, the system also includes a 3D visualization module, which is used to display the digital twin model of the aqueduct and its seismic response simulation results, identify the damage location and update the aqueduct operation status in real time.

[0015] Optionally, the data acquisition module includes:

[0016] Multiple types of sensors are arranged at weak and key locations of the aqueduct to collect strain, displacement, vibration, temperature and humidity, pressure and load parameters of the aqueduct. Among them, the rebar meter, displacement sensor and vibration sensor are used to collect the mechanical state of the aqueduct in real time, the temperature and humidity sensor is used to collect the environmental parameters of the aqueduct in real time, and the water level meter is used to monitor the water level depth in the aqueduct and calculate the real-time load of the aqueduct body;

[0017] Visual recognition system, which is arranged at the front, rear, bottom and sides of the aqueduct, and is used to record the aqueduct operation video and collect the aqueduct surface damage information;

[0018] A data transmission unit is used to transmit the physical data and visual data collected by the multi-type sensors and the visual recognition system to a control system.

[0019] Optionally, the earthquake early warning module includes:

[0020] An external data receiving unit, which is used to receive earthquake warning information from the China Earthquake Networks Early Warning Center, including the epicenter location, focal depth, and magnitude;

[0021] Seismic monitoring equipment, which is deployed in the area where the aqueduct is located and is used to collect seismic wave data in real time;

[0022] A data fusion and processing unit is connected to the external data receiving unit and the early warning device, and is used to fuse the information of the two data sources, calculate the time when the seismic wave reaches the aqueduct according to the seismic wave propagation speed and the geographical parameters of the aqueduct location; classify, store and analyze the seismic wave data, and extract the magnitude, intensity, peak displacement, peak velocity, and peak acceleration; an output unit is connected to the data fusion and processing unit, and is used to output the processed basic seismic data.

[0023] Optionally, the 3D visualization module includes:

[0024] A data interaction unit, used to receive the aqueduct digital twin model and earthquake response simulation results;

[0025] The model building unit is used to generate a three-dimensional digital twin model of the aqueduct in real time and dynamically update the model according to the mechanical state and visual data of the aqueduct provided by the control system; splice the aqueduct surface images obtained by the visual recognition system through the image processing algorithm and identify the damage information on the aqueduct surface;

[0026] The dynamic display unit is used to dynamically display the digital twin model of the aqueduct and the seismic response simulation results through a 3D visualization platform, and to mark and update the damage location and operating status of the aqueduct in real time.

[0027] Optionally, the gate valve control module includes: a plurality of emergency water discharge valves installed on the aqueduct and a gate valve installed at the entrance of the aqueduct, and the emergency water discharge valves and the gate valves receive control instructions from the control system.

[0028] A digital twin-based aqueduct seismic disaster reduction method, based on the digital twin-based aqueduct seismic disaster reduction system as described above, the method comprising:

[0029] Obtain real-time earthquake information from the China Earthquake Networks Early Warning Center, including epicenter location, focal depth, magnitude and other early warning information;

[0030] Determine whether the magnitude of the earthquake at the location of the aqueduct is less than the preset value: if the magnitude is less than the preset value, no action is taken; if the magnitude is not less than the preset value, the water volume of the aqueduct is dynamically adjusted according to the earthquake resistance plan;

[0031] Build a digital twin model of the aqueduct;

[0032] Obtain real-time seismic wave data and extract the information required for earthquake calculation from the seismic wave data;

[0033] Import the information required for earthquake calculation into the digital twin model of the aqueduct, and simulate the stress and damage mode of the key parts of the aqueduct caused by earthquakes through finite element analysis to determine the possible damage locations;

[0034] Based on the finite element analysis results, earthquake damage assessment is carried out.

[0035] Specifically, the earthquake-resistant method includes:

[0036] Through the external data receiving unit in the earthquake early warning module, real-time earthquake information including epicenter location, focal depth, magnitude and seismic wave propagation speed is obtained from the China Earthquake Networks Early Warning Center;

[0037] Collect seismic wave data in the aqueduct area through remote sensing early warning equipment, including waveform characteristics and acceleration response spectrum;

[0038] The data fusion and processing unit in the earthquake early warning module is used to perform data fusion, extract the peak displacement, peak velocity and peak acceleration, and calculate the time when the seismic wave reaches the aqueduct according to the propagation velocity of the seismic wave;

[0039] Determine whether the magnitude of the aqueduct location reaches the preset value:

[0040] If the magnitude is less than the preset value, no action is taken;

[0041] If the magnitude is not less than the preset value, a control command is generated through the control system, and a signal is sent to the gate valve control module to start the control gate, sluice gate, and emergency water discharge device of the aqueduct to adjust the water depth in the aqueduct to the minimum earthquake response position;

[0042] The mitigation methods include:

[0043] The control system receives physical data and visual data from the data acquisition module, as well as manual inspection judgment data, and combines it with earthquake characteristic information provided by the earthquake early warning module to build a digital twin model of the aqueduct.

[0044] Using finite element analysis software, the real-time updated monitoring data is imported into the digital twin model of the aqueduct to simulate the stress conditions and damage patterns of key parts of the aqueduct under earthquake action, generate earthquake response simulation results, and identify possible damage locations;

[0045] The image data acquired by the visual recognition system is spliced ​​through the model building unit, and the surface damage information of the aqueduct is identified in combination with the finite element analysis results, and is displayed in real time through the dynamic display unit;

[0046] The data acquisition module obtains monitoring data and on-site videos, and combines manual inspection information to calculate and evaluate the post-earthquake safety status of the aqueduct;

[0047] The 3D visualization module dynamically displays the aqueduct digital twin model, earthquake response simulation results and damage assessment information, identifies the damage location in real time, and updates the operating status of the aqueduct.

[0048] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0049] The system in the present invention includes a data acquisition module, an earthquake early warning receiving module, a control system, a gate valve control module, a notification module, a 3D visualization module and an aqueduct post-earthquake assessment module. The data acquisition module monitors the physical parameters and damage information of the aqueduct as needed through multiple types of sensors and a visual recognition system; the earthquake early warning module integrates the earthquake data collected by the external data receiving unit and the early warning device, calculates the arrival time of the earthquake wave and extracts the earthquake characteristics; the control system integrates the monitoring data and the earthquake characteristic information, constructs a digital twin model, performs earthquake response simulation and earthquake damage assessment, and generates control instructions for dynamically adjusting the water volume of the aqueduct; the gate valve control module adjusts the water depth in the aqueduct according to the control instructions; the 3D visualization module dynamically displays the digital twin model of the aqueduct and the earthquake damage assessment results; the notification module pushes real-time information and emergency suggestions to management personnel.

[0050] The present invention realizes the real-time acquisition of aqueduct status information and earthquake data by adopting the joint monitoring of data acquisition module and earthquake early warning module, providing accurate data support for subsequent control and simulation. By inputting monitoring data and earthquake characteristic information into the control system, constructing a digital twin model of the aqueduct, and conducting earthquake response simulation and earthquake damage assessment, the impact of earthquakes on the aqueduct structure can be accurately predicted, so as to quickly identify structural weaknesses and optimize seismic performance. The present invention greatly improves the seismic disaster reduction capability of the aqueduct by realizing the full-process intelligent management of the aqueduct structure from pre-earthquake early warning, epicenter earthquake resistance to post-earthquake assessment and repair, and has important engineering application value and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0052] Figure 1 It is a schematic diagram of the principle of a method for earthquake-resistant disaster reduction of an aqueduct based on digital twin according to the present invention.

[0053] Figure 2 It is a schematic diagram of the forces on the bottom of the pier during an earthquake with or without water in the aqueduct according to the present invention.

[0054] Figure 3 1 is a schematic diagram of the TLD vibration reduction principle of the aqueduct according to the present invention.

[0055] Figure 4 It is a schematic diagram of the principle of adjusting the dynamic response of an aqueduct by adjusting the water depth in the aqueduct according to the present invention.

[0056] Figure 5 It is a schematic flow chart of a method for earthquake-resistant disaster reduction of an aqueduct based on digital twin according to the present invention. DETAILED DESCRIPTION

[0057] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described herein are only used to explain the relevant content, rather than to limit the present invention.

[0058] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0059] In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0060] This technology is based on the difference in propagation speed between seismic waves and radio waves. By sensing seismic wave information in advance, the gate valves or valves in the aqueduct can be dynamically controlled in time before the destructive seismic waves reach the aqueduct. Figure 1 Specifically, the earthquake early warning system obtains real-time earthquake information, and uses the high propagation speed of radio waves to quickly transmit data such as the epicenter location, seismic wave characteristics, and magnitude to the control system. The control system generates precise control instructions based on the transmitted information and the real-time structural status of the aqueduct, adjusts the water volume in the aqueduct, and thus changes the dynamic characteristics of the aqueduct, such as Figure 2 , Figure 3 and Figure 4 shown.

[0061] By adjusting the water depth in the channel, the frequency band where seismic energy is concentrated (i.e. the resonance zone between the aqueduct structure and the seismic frequency) can be effectively avoided, and the response amplitude of the aqueduct under earthquake action can be reduced. At the same time, when used in conjunction with seismic isolation and energy dissipation devices, the seismic input energy can be further dispersed, the overall seismic response of the aqueduct structure can be reduced, and the risk of earthquake damage to the aqueduct can be significantly reduced.

[0062] Seismic waves are divided into P waves (longitudinal waves) and S waves (transverse waves). P waves travel faster but are less destructive; S waves travel slower but are more destructive. By using the early warning function of P waves and transmitting relevant data via radio waves, the control system can gain operating time and complete the power adjustment of the aqueduct before the S waves arrive.

[0063] The control system simulates the impact of different water volumes on the structural dynamic characteristics based on the digital twin model of the aqueduct, and formulates a water volume adjustment plan based on real-time earthquake magnitude information. The gate valve control module quickly adjusts the water volume in the aqueduct, for example, by discharging or storing water to optimize the stiffness and mass distribution of the aqueduct.

[0064] This technology uses the speed difference between seismic waves (especially P waves) and radio waves. Before destructive seismic waves (such as S waves) arrive, the water volume in the aqueduct is adjusted by controlling the gate valves, changing the dynamic characteristics of the structure to avoid the resonant frequency band where energy is concentrated. At the same time, the seismic energy is dispersed by combining the seismic isolation and energy dissipation device, thereby reducing the seismic response of the aqueduct. The entire system realizes the seismic disaster reduction function of the aqueduct through the coordinated action of earthquake early warning, control command generation, gate valve execution and shock absorption device.

[0065] Embodiment 1

[0066] An aqueduct earthquake-resistant disaster reduction system based on digital twins, comprising:

[0067] The data acquisition module is used to collect the physical parameters and visual data of the aqueduct and transmit the collected data to the control system; it collects physical parameters such as strain, displacement, vibration, temperature and humidity, pressure and water level depth in the aqueduct through multiple types of sensors to reflect the structural state and load changes of the aqueduct; and it collects the surface image of the aqueduct through the visual recognition system to identify damage characteristics such as cracks and deformation.

[0068] The earthquake early warning module is used to collect basic earthquake data, including epicenter location, focal depth, seismic wave velocity, magnitude and intensity, and transmit the basic earthquake data to the control system.

[0069] The control system is used to integrate the basic seismic data output by the earthquake early warning module and the aqueduct status data collected by the data acquisition module, simulate the seismic response based on the aqueduct digital twin model, predict the dynamic response of the structure and potential damage locations; conduct disaster level assessment, generate control instructions for dynamically adjusting the water volume in the aqueduct, and send the instructions to the gate valve control module through the communication interface.

[0070] The gate valve control module is connected to the control system in communication, receives control instructions from the control system, and dynamically adjusts the water volume in the aqueduct. It changes the water volume in the aqueduct by quickly adjusting the open or closed state of the gate valve. At the same time, it optimizes the mass and stiffness distribution of the aqueduct through the emergency discharge valve, thereby avoiding the frequency band where seismic energy is concentrated and reducing seismic response.

[0071] The notification module communicates with the control system, receives earthquake response simulation and disaster level assessment, and pushes it to management personnel. It pushes early warning information, earthquake damage assessment and emergency response suggestions to management personnel to support scientific decision-making and rapid response.

[0072] 3D visualization module, which is used to display the digital twin model of the aqueduct and its earthquake response simulation results, identify the damaged location and update the aqueduct operation status in real time. The digital twin model of the aqueduct and the earthquake response simulation results are presented in real time to intuitively display the stress condition and operation status of the aqueduct; visually identify the identified damaged locations and provide earthquake damage information to facilitate subsequent repair and maintenance; and update the dynamic operation data of the aqueduct in real time, so that managers can fully understand the aqueduct status.

[0073] This system integrates sensor monitoring, digital twin modeling, earthquake early warning analysis and dynamic control technology to form a full-process earthquake disaster reduction solution from pre-earthquake monitoring and early warning, epicenter response control to post-earthquake assessment and repair. Specifically:

[0074] The data acquisition module and earthquake early warning module provide real-time data, laying the foundation for control decisions;

[0075] The control system uses digital twin models for analysis and simulation to generate precise control instructions;

[0076] The gate valve control module optimizes the dynamic characteristics of the aqueduct by dynamically adjusting the water volume in the aqueduct;

[0077] The 3D visualization module displays the operation status and damage information of the aqueduct in real time, improving the efficiency of post-earthquake repair;

[0078] The notification module ensures information transmission and emergency decision-making.

[0079] Embodiment 2

[0080] The data acquisition module is the basic part of the whole system. It provides high-precision basic data support for subsequent seismic response simulation and dynamic adjustment by real-time monitoring of the physical state and surface damage information of the aqueduct. The data acquisition module includes:

[0081] Multiple types of sensors are arranged at weak and key locations of the aqueduct to collect strain, displacement, vibration, temperature and humidity, pressure and load parameters of the aqueduct. Among them: the rebar meter monitors the strain changes of the aqueduct structure in real time, reflecting the stress state of the structure and potential stress concentration areas; the displacement sensor measures the displacement of key nodes of the aqueduct, which is used to analyze the overall deformation and local displacement characteristics of the structure; the vibration sensor captures the vibration response characteristics of the aqueduct under earthquakes or external disturbances, providing data support for dynamic analysis; the temperature and humidity sensor monitors the temperature and humidity changes of the environment where the aqueduct is located, and evaluates the impact of environmental conditions on the structural state; the water level meter is used to monitor the water level depth in the trough and calculate the real-time load on the trough body.

[0082] The visual recognition system is arranged at the front, back, bottom and sides of the aqueduct to achieve all-round monitoring of the structural surface; it collects damage information on the aqueduct surface in real time, and captures damage information such as cracks and deformation through image data, providing an intuitive basis for post-earthquake damage assessment. Video recognition can record the condition of the aqueduct during the earthquake and identify damage to the concrete structure.

[0083] The data transmission unit is used to transmit the physical data and visual data collected by multiple types of sensors and visual recognition systems to the control system.

[0084] The earthquake early warning module is responsible for real-time monitoring, analysis and early warning of earthquake information in the system. The earthquake early warning module includes:

[0085] An external data receiving unit, which is used to receive seismic wave data from the China Earthquake Networks Early Warning Center (which provides comprehensive and authoritative earthquake information), including epicenter location, focal depth, seismic wave velocity, magnitude, and intensity;

[0086] Remote sensing early warning equipment is deployed in the area where the aqueduct is located. It is used to collect real-time earthquake disaster characteristic data, including epicenter location, focal depth, seismic wave velocity, waveform characteristics and acceleration response spectrum; it supplements external data and provides higher-resolution regional monitoring data. In practice, this part of the equipment can be omitted, that is, only the data from the China Earthquake Networks Early Warning Center can be used.

[0087] A data fusion and processing unit, which is connected to the external data receiving unit and the remote sensing early warning device, is used to fuse the information of the two data sources, classify, store and analyze the seismic wave data, and extract the magnitude, intensity, peak displacement, peak velocity, peak acceleration, and calculate the time when the seismic wave reaches the aqueduct according to the seismic wave propagation speed and the geographical parameters of the aqueduct location;

[0088] The output unit is connected to the data fusion and processing unit and is used to output the processed basic seismic data and the seismic wave arrival time prediction results.

[0089] The earthquake early warning module uses dual data sources, combining external authoritative data and regional remote sensing monitoring data to ensure the comprehensiveness and timeliness of earthquake information; through the analysis and calculation of seismic wave propagation speed and aqueduct location parameters, high-precision seismic wave arrival time prediction can be achieved, thus buying valuable time for earthquake-resistant measures.

[0090] The 3D visualization module uses digital twin technology and real-time data processing to intuitively present the dynamic operation status and seismic response results of the aqueduct to users. The 3D visualization module includes:

[0091] A data interaction unit, used to receive the aqueduct digital twin model and earthquake response simulation results;

[0092] The model building unit is used to generate a three-dimensional digital twin model of the aqueduct in real time and dynamically update the model according to the mechanical state and visual data of the aqueduct provided by the control system; splice the aqueduct surface images obtained by the visual recognition system through the image processing algorithm and identify the damage information on the aqueduct surface;

[0093] The dynamic display unit is used to dynamically display the digital twin model of the aqueduct and the seismic response simulation results through the 3D visualization platform, and mark and update the damage location and operation status of the aqueduct in real time. The damage location on the aqueduct surface, such as cracks and deformation, is marked in real time; as the data is updated, the operation status of the aqueduct is dynamically adjusted to provide comprehensive structural health information.

[0094] The 3D visualization module receives the digital twin model and earthquake response simulation results through the data interaction unit, generates and dynamically updates the 3D model of the aqueduct using the model building unit, and displays the model and damage information in real time through the dynamic display unit. This module realizes the intuitive visualization of the aqueduct operation status and earthquake response results, provides managers with an efficient decision support tool, and enhances the intelligence and operability of the system.

[0095] The gate valve control module is the execution unit in the system. Its core function is to dynamically adjust the water volume in the aqueduct according to the instructions generated by the control system, thereby optimizing the dynamic characteristics of the aqueduct and reducing the risk of earthquake damage to the aqueduct structure. The gate valve control module includes: multiple emergency water discharge valves installed on the aqueduct and gate valves installed at the entrance of the aqueduct. The emergency water discharge valves and gate valves receive control instructions from the control system.

[0096] Emergency water release valves are used to quickly release water from the aqueduct to reduce the dynamic load of the aqueduct structure during earthquakes. Multiple emergency water release valves are evenly distributed in key areas of the aqueduct, such as the sides and bottom, to achieve fast and effective water volume regulation; when the control system issues an emergency command, the water release valve opens quickly to release the water in the aqueduct to a safe level, thereby reducing the mass of the aqueduct and changing its dynamic characteristics.

[0097] The gate valve at the entrance of the aqueduct is used to control the water flow entering the aqueduct, adjust the initial water level of the aqueduct, or prevent water from entering the aqueduct to deal with emergencies. It is arranged at the entrance of the aqueduct to globally control the water flow entering the aqueduct; according to the instructions of the control system, the gate valve can be quickly closed to prevent water from flowing in, or opened appropriately to adjust the amount of water entering, ensuring the safety range of the water level in the aqueduct.

[0098] The gate valve control module consists of multiple emergency water discharge valves and gate valves at the entrance of the aqueduct, which are responsible for rapid water discharge and inlet water volume control respectively. Through communication with the control system, the module can efficiently receive instructions and perform precise dynamic water volume adjustments, providing effective support for the seismic resistance of the aqueduct structure. The emergency water discharge valve reduces the dynamic response of the aqueduct, while the gate valve ensures the global controllability of the water volume. The synergistic effect of the two significantly improves the system's earthquake resistance and disaster reduction capabilities.

[0099] Embodiment 3

[0100] like Figure 5 As shown, a digital twin-based aqueduct seismic disaster reduction method is provided. Based on the digital twin-based aqueduct seismic disaster reduction system as described above, the method includes: obtaining weak parts of the design scheme through calculation simulation on the digital twin platform during design, and performing structural optimization in the construction drawing stage to meet safety requirements;

[0101] The earthquake resistance and disaster reduction method comprises:

[0102] Before or in the early stages of an earthquake, the seismic response amplitude of the aqueduct can be reduced through rapid processing of seismic information and dynamic adjustment measures.

[0103] Obtain real-time earthquake information from the China Earthquake Networks Early Warning Center, including epicenter location, focal depth, magnitude, intensity, and seismic wave propagation speed;

[0104] Determine whether the magnitude of the earthquake at the location of the aqueduct is less than the preset value: if the magnitude is less than the preset value, it is considered that the earthquake will not have a significant impact on the aqueduct, so no dynamic adjustment action is taken;

[0105] If the magnitude is not less than the preset value, the water volume of the aqueduct will be dynamically adjusted according to the earthquake emergency plan;

[0106] Rapidly assess the damage of the aqueduct after the earthquake to provide a scientific basis for repair. Build a digital twin model of the aqueduct based on the finite element model or BIM model;

[0107] Obtain real-time seismic wave data and extract the information required for earthquake calculation from the seismic wave data;

[0108] Import the information required for earthquake calculation into the digital twin model of the aqueduct, and simulate the stress and damage mode of the key parts of the aqueduct caused by earthquakes through finite element analysis to determine the possible damage locations;

[0109] Based on the finite element analysis results, earthquake damage assessment is carried out.

[0110] Embodiment 4

[0111] The following provides a specific method in combination with Embodiments 1, 2, and 3.

[0112] The core goal of the seismic resistance method is to quickly adjust the dynamic characteristics of the aqueduct structure and reduce the seismic response amplitude before the destructive seismic waves arrive by acquiring and processing real-time seismic information. The specific implementation steps are as follows:

[0113] Through the external data receiving unit in the earthquake early warning module, real-time earthquake information including epicenter location, focal depth, magnitude and seismic wave propagation speed is obtained from the China Earthquake Networks Early Warning Center;

[0114] Remote sensing early warning equipment is used to collect seismic wave data in the aqueduct area, including waveform characteristics and acceleration response spectra, to provide local high-resolution seismic characteristic data.

[0115] The data fusion and processing unit in the earthquake early warning module is used to perform data fusion, extract peak displacement, peak velocity and peak acceleration, and calculate the time when the seismic wave reaches the aqueduct by analyzing the seismic wave propagation velocity and the aqueduct geographical location parameters;

[0116] Determine whether the magnitude of the aqueduct location reaches the preset value:

[0117] If the magnitude is less than the preset value, no action is taken;

[0118] If the magnitude is not less than the preset value, the control system generates a control instruction, sends a signal to the gate valve control module, starts the aqueduct emergency discharge device, and adjusts the water depth in the aqueduct to the minimum position; the gate valve control module quickly reduces the water volume in the aqueduct through the emergency discharge valve or prevents water from flowing into the aqueduct through the inlet gate valve.

[0119] The core goal of the disaster reduction method is to achieve rapid post-earthquake damage assessment and formulation of repair recommendations through digital twin technology and real-time data processing. The specific implementation steps are as follows:

[0120] The control system receives physical data (such as strain, displacement, pressure, etc.) and visual data (such as surface damage images) from the data acquisition module, and combines the earthquake characteristic information provided by the earthquake early warning module to build a digital twin model of the aqueduct;

[0121] Using commercial finite element analysis software, the real-time updated monitoring data is imported into the digital twin model of the aqueduct to simulate the stress conditions and damage patterns of key parts of the aqueduct under the action of earthquakes, generate earthquake response simulation results, identify possible damage locations, and determine the severity of the damaged areas.

[0122] The image data acquired by the visual recognition system is spliced ​​through the model building unit, and the surface damage information of the aqueduct is identified in combination with the finite element analysis results, and is displayed in real time through the dynamic display unit;

[0123] The data acquisition module acquires monitoring data and on-site videos, and combines manual inspection information to conduct empirical earthquake damage assessments on damaged areas;

[0124] The 3D visualization module dynamically displays the aqueduct digital twin model, earthquake response simulation results and damage assessment information, identifies the damage location in real time, and updates the operating status of the aqueduct.

[0125] Embodiment 5

[0126] The existing technology used in the method of extracting magnitude, intensity, peak displacement, peak velocity and peak acceleration from seismic data is described as follows:

[0127] ObsPy seismic data processing library is used in Python to process the raw waveform data in SAC or MiniSEED standard format downloaded from the seismic network center. The waveform data is read and preprocessed, including denoising (such as bandpass filtering) and baseline correction to ensure the quality and accuracy of the signal. Then, the STA / LTA algorithm is used to automatically pick up seismic phases, including P waves, S waves, and surface waves. At the same time, peak parameters such as maximum amplitude, duration and other key features are directly extracted from the waveform.

[0128] In terms of magnitude calculation, the Richter magnitude (ML) is calculated by extracting the maximum amplitude and combining it with the epicenter distance, and the moment magnitude (MW) is further calculated by combining the source parameters and energy distribution. The moment magnitude can be derived from the amplitude-epicenter distance relationship and the spectrum characteristics. In spectrum analysis, the fast Fourier transform (FFT) is used to calculate the spectrum of the seismic wave, analyze its main frequency and bandwidth characteristics, and thus identify the characteristics of the source mechanism and seismic wave energy distribution. In addition, the short-time Fourier transform (STFT) is used to capture the time-frequency characteristics of the seismic signal and obtain the instantaneous change characteristics of the signal.

[0129] For the estimation of intensity, the empirical formula is used to evaluate the intensity classification by combining the peak acceleration (PGA), peak velocity (PGV) and epicenter distance. At the same time, the peak velocity and peak displacement are calculated by performing the first and second integration of the acceleration waveform, respectively, and the characteristic parameters of seismic wave motion are extracted.

[0130] The existing technology used to monitor the water level depth in the tank and calculate the real-time load of the tank body by a water level meter is described as follows:

[0131] The load of the trough structure is composed of the trough body's own weight and the water load. The trough body's own weight is a known quantity during design and construction, so the calculation of the trough body's real-time load only requires knowing the real-time water load in the trough body.

[0132] A pressure sensor is installed at the bottom of the water-passing section of the aqueduct body, in direct contact with the water. When the water depth at the sensor location changes, the static pressure of the water will change accordingly, and the sensitive element in the sensor (such as a piezoelectric element, a capacitive diaphragm or a strain gauge) will detect this pressure change. The sensitive element of the sensor converts the mechanical change of pressure into an electrical signal. The sensor uses an amplification circuit to enhance the signal strength and converts the electrical signal into a digital signal through analog-to-digital conversion (ADC). The digitized pressure data is transmitted wirelessly to the data acquisition system and calculated according to the relationship between pressure and water depth, H=P / (ρg), where H is the water depth, P is the measured pressure, ρ is the density of water, and g is the acceleration of gravity. After knowing the water depth, the water load in the aqueduct body can be calculated based on the cross-sectional size information of the aqueduct, thereby completing the real-time load monitoring of the aqueduct body.

[0133] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0134] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0135] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. An aqueduct earthquake-resistant disaster reduction system based on digital twins, characterized in that: include: A data acquisition module, which is used to collect physical parameters and visual data of the aqueduct and transmit the collected data to the control system; An earthquake early warning module is used to receive earthquake early warning data and transmit basic earthquake data to a control system; A control system, which is used to integrate the basic earthquake data output by the earthquake early warning module and the aqueduct status data collected by the data acquisition module, perform earthquake response simulation and disaster level assessment based on the aqueduct digital twin model, and generate control instructions at the same time; The gate valve control module is connected to the control system for communication, receives control instructions from the control system, and dynamically adjusts the water volume in the aqueduct; The notification module is connected to the control system for receiving earthquake response simulation and disaster level assessment and sending the information to management personnel. The aqueduct post-seismic assessment module is used to calculate and evaluate the safety status of the aqueduct building by integrating the digital twin model with on-site monitoring, manual inspection and other information after receiving the earthquake signal.

2. According to the digital twin-based aqueduct earthquake-resistant disaster reduction system of claim 1, it is characterized in that: It also includes a 3D visualization module, which is used to display the digital twin model of the aqueduct and its seismic response simulation results, identify damage locations and update the aqueduct operation status in real time.

3. The digital twin-based aqueduct earthquake-resistant disaster reduction system according to claim 2 is characterized in that: The data acquisition module comprises: Multiple types of sensors are arranged at weak and key locations of the aqueduct to collect strain, displacement, vibration, temperature, pressure and load parameters of the aqueduct, including: steel gauge, steel gauge, displacement sensor and vibration sensor for real-time collection of the mechanical state of the aqueduct, temperature and humidity sensor for real-time collection of environmental parameters of the aqueduct, and water level gauge for monitoring the water level depth in the aqueduct; Visual recognition system, which is arranged at the front end, rear end, bottom and side of the aqueduct, and is used to collect surface damage information of the aqueduct in real time; A data transmission unit is used to transmit the physical data and visual data collected by the multi-type sensors and the visual recognition system to a control system.

4. The digital twin-based aqueduct earthquake-resistant disaster reduction system according to claim 1 is characterized in that: The earthquake early warning module comprises: An external data receiving unit, which is used to receive seismic wave data from the China Earthquake Networks Early Warning Center, including epicenter location, focal depth, seismic wave velocity, magnitude, intensity, and seismic wave arrival time; Seismic monitoring equipment, which is arranged in the area where the aqueduct is located, and is used to collect real-time seismic wave data of the site near the aqueduct; A data fusion and processing unit, which is connected to the external data receiving unit and the remote sensing early warning device, is used to fuse the information of the two data sources, classify, store and analyze the seismic wave data, and extract the magnitude, intensity, peak displacement, peak velocity, peak acceleration, and calculate the time when the seismic wave reaches the aqueduct according to the seismic wave propagation speed and the geographical parameters of the aqueduct location; The output unit is connected to the data fusion and processing unit and is used to output the processed basic seismic data and the seismic wave arrival time prediction results.

5. The digital twin-based aqueduct earthquake-resistant disaster reduction system according to claim 3 is characterized in that: The 3D visualization module includes: A data interaction unit, used to receive the aqueduct digital twin model and earthquake response simulation results; The model construction unit is used to generate a three-dimensional digital twin model of the aqueduct in real time, and dynamically update the model according to the mechanical state and visual data of the aqueduct provided by the control system; the aqueduct surface images obtained by the visual recognition system are spliced ​​through image processing algorithms, and the surface damage information of the aqueduct is identified; post-earthquake damage information of the structure is obtained through manual inspections; the dynamic display unit is used to dynamically display the digital twin model of the aqueduct and the earthquake response simulation results through a 3D visualization platform, and to mark and update the damage location and operating status of the aqueduct in real time.

6. The digital twin-based aqueduct earthquake-resistant disaster reduction system according to claim 3 is characterized in that: The gate valve control module includes: a plurality of emergency water discharge valves installed on the aqueduct and a gate installed at the entrance of the aqueduct, and the emergency water discharge valves and the gate receive control instructions from the control system.

7. A method for earthquake-resistant disaster reduction of aqueduct based on digital twins, characterized in that: Based on the digital twin-based aqueduct earthquake resistance and disaster reduction system as described in any one of claims 1 to 6, the method comprises: obtaining real-time earthquake information from the China Earthquake Networks Early Warning Center, including early warning information such as epicenter location, focal depth, and magnitude; Determine whether the magnitude of the earthquake at the location of the aqueduct is less than the preset value: if the magnitude is less than the preset value, no action is taken; if the magnitude is not less than the preset value, the water volume of the aqueduct is dynamically adjusted according to the earthquake resistance plan; Build a digital twin model of the aqueduct; Obtain real-time seismic wave data and extract the information required for earthquake resistance calculation from the seismic wave data; Import the information required for earthquake calculation into the digital twin model of the aqueduct, and simulate the stress and damage mode of the key parts of the aqueduct caused by earthquakes through finite element analysis to determine the possible damage locations; Based on the finite element analysis results, monitoring data and manual inspection data, an assessment of the aqueduct's post-earthquake safety status was conducted.

8. The digital twin-based aqueduct earthquake disaster reduction method according to claim 7, characterized in that: The earthquake-resistant method comprises: Through the external data receiving unit in the earthquake early warning module, real-time earthquake information including epicenter location, focal depth, magnitude and seismic wave propagation speed is obtained from the China Earthquake Networks Early Warning Center; Collect seismic wave data in the area where the aqueduct is located through seismic monitoring equipment, including waveform characteristics and acceleration response spectrum; The data fusion and processing unit in the earthquake early warning module is used to perform data fusion, extract the peak displacement, peak velocity and peak acceleration, and calculate the time when the seismic wave reaches the aqueduct according to the propagation velocity of the seismic wave; Determine whether the magnitude of the aqueduct location reaches the preset value: If the magnitude is less than the preset value, no action is taken; If the magnitude is not less than the preset value, a control instruction is generated through the control system, and a signal is sent to the gate valve control module to start the aqueduct's regulating gate, spillway, and emergency discharge device to adjust the water depth in the aqueduct to the minimum earthquake response position.

9. The digital twin-based aqueduct earthquake disaster reduction method according to claim 7, characterized in that: The mitigation methods include: The control system receives physical data and visual data from the data acquisition module, as well as manual inspection judgment data, and combines it with earthquake characteristic information provided by the earthquake early warning module to build a digital twin model of the aqueduct. Using finite element analysis software, the real-time updated monitoring data is imported into the digital twin model of the aqueduct to simulate the stress conditions and damage patterns of key parts of the aqueduct under earthquake action, generate earthquake response simulation results, and identify possible damage locations; The image data acquired by the visual recognition system is spliced ​​through the model building unit, and the surface damage information of the aqueduct is identified in combination with the finite element analysis results, and is displayed in real time through the dynamic display unit; The data acquisition module obtains monitoring data and on-site videos, and combines manual inspection information to calculate and evaluate the post-earthquake safety status of the aqueduct; The 3D visualization module dynamically displays the aqueduct digital twin model, earthquake response simulation results and damage assessment information, identifies the damage location in real time, and updates the operating status of the aqueduct.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the method according to any one of claims 7 to 9 is implemented.

Images