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CN-121978747-A - Electromagnetic drive and artificial intelligence simulation-based circulating water channel earthquake simulation test system and test method

CN121978747ACN 121978747 ACN121978747 ACN 121978747ACN-121978747-A

Abstract

The invention relates to a circulating water tank earthquake simulation test system and a test method based on electromagnetic driving and artificial intelligent simulation, which are used for integrating a circulating water tank main body, a wave generating system and a triaxial electromagnetic earthquake table for the first time, and can realize X/Y/Z triaxial vibration, wherein each axis is independently controlled. By combining the contact sensor and the non-contact optical measurement, a similar criterion library is constructed, working condition errors of an actual environment and an experimental environment can be reduced as far as possible according to different experimental purposes, complex working conditions of a structure in the actual marine environment bearing wave, water flow and earthquake actions can be simulated, and experimental results have higher reference values. The one-key flow control is realized through the central control unit, and the AI technology is utilized for waveform generation and data processing, so that the experimental efficiency and the scientific research depth are greatly improved.

Inventors

  • YAO ZISHUN
  • CHENG XIANTING
  • WANG HAN
  • GUAN DAWEI
  • LIU JINGANG

Assignees

  • 河海大学
  • 中国电建集团贵阳勘测设计研究院有限公司

Dates

Publication Date
20260505
Application Date
20260128

Claims (10)

  1. 1. The circulating water tank earthquake simulation test system based on electromagnetic driving and artificial intelligent simulation comprises a circulating water tank main body and is characterized in that the circulating water tank main body comprises an upstream water inlet section, a test section and a downstream water storage section which are sequentially communicated, wherein the test section is used as an observation and operation area, and a stainless steel sandbox for test is embedded at the bottom of the test section; the method comprises the steps that a triaxial electromagnetic earthquake simulation subsystem is installed at the bottom of a test section and comprises a vibrating table, an electromagnetic vibrating table support column and an electromagnetic driving device, a stainless steel sandbox is arranged on the vibrating table, the vibrating table is supported by the electromagnetic vibrating table support column, meanwhile, the electromagnetic vibrating table support column provides a position reference for the electromagnetic driving device, namely, a space for installing the electromagnetic driving device is formed below the test section by the electromagnetic vibrating table support column, and the electromagnetic driving device provides X, Y and translational vibration force in the Z-axis direction for the stainless steel sandbox; A wave generating and rectifying system is arranged at the initial position of the upstream water inlet section and is used for simulating waves and setting inflow conditions; The downstream water circulation and treatment system is arranged at the downstream water storage section and comprises a water pump, and water collected in the downstream water storage section after the experiment is pumped back to the upstream water inlet section through the water pump to form a water circulation channel; The non-contact optical measurement equipment is erected at the opening of the main body of the circulating water tank, a plurality of contact sensors are also installed in the circulating water tank earthquake simulation test system, and the triaxial electromagnetic earthquake simulation subsystem, the wave-making and rectifying system, the downstream water circulation and processing system, the non-contact optical measurement equipment and the contact sensors are simultaneously communicated with the intelligent control and data processing center, so that distributed management and control of the whole circulating water tank earthquake simulation test system are realized.
  2. 2. The electromagnetic drive and artificial intelligence simulation-based circulating water tank earthquake simulation test system is characterized in that a wave-making and rectifying system of an upstream water inlet section comprises a wave-making machine and a rectifying device, wherein the wave-making machine is arranged close to a test section, the wave-making machine adopts a push plate type or a rocking plate type or a piston type according to a wave sequence of sea conditions to be simulated, and the rectifying device adopts a multilayer honeycomb plate, a damping net or a guide vane; The downstream water circulation and treatment system of the downstream water storage section comprises a water tank, a sand sedimentation tank, a water pump, a sand pump and a water injection pipeline, wherein the sand sedimentation tank is arranged at the bottom of one side, close to the test section, of the water tank, the water pump is arranged on a pipeline communicated with the water tank, the pipeline is communicated with the upstream water inlet section, the sand pump is arranged on a pipeline communicated with the sand sedimentation tank, one end of the water injection pipeline is communicated with an external water source, and the other end of the water injection pipeline is communicated with the water tank.
  3. 3. The electromagnetic drive and artificial intelligence simulation-based circulating water channel earthquake simulation test system is characterized in that a vibration bearing plate is horizontally arranged on the top of a vibration table, and the surface of the vibration bearing plate supports a stainless steel sandbox; the electromagnetic driving device comprises a horizontal magnetic driving end, a horizontal magnetic receiving end, a vertical magnetic driving end and a vertical magnetic receiving end; The electromagnetic vibration table support column is vertically provided with a plurality of horizontal magnetic driving ends on a lateral mounting surface of the electromagnetic vibration table support column relative to the vibration bearing plate, and the horizontal magnetic receiving ends are arranged on the side wall of the vibration bearing plate and the position opposite to the horizontal magnetic driving ends.
  4. 4. The electromagnetic drive and artificial intelligence simulation-based circulating water channel earthquake simulation test system according to claim 3 is characterized in that a plurality of mass center adjusting blocks are arranged at four corner positions of the vibration carrier plate and used for fine-adjusting the position of the mass center of the whole circulating water channel earthquake simulation test system; The bearing positions of the vibrating table and the vibrating bearing plate are provided with elastic roller guide rails, so that the vibrating table is ensured to move along the preset degree of freedom; the driving structure part of the vibrating table and the space formed by the supporting columns of the electromagnetic vibrating table for installing the electromagnetic driving device are coated with high-conductivity or high-permeability materials for inhibiting the external radiation of strong electromagnetic fields.
  5. 5. The circulating water tank earthquake simulation test system based on electromagnetic driving and artificial intelligent simulation of claim 1 is characterized in that the top opening end of a stainless steel sandbox is flush with the bottom plates of an upstream water inlet section and a downstream water storage section, a sandbox water outlet is formed in the bottom of the stainless steel sandbox, and a flexible sealing rubber skirt is arranged at the joint of the bottom of the test section and the bottom of the stainless steel sandbox.
  6. 6. The electromagnetic drive and artificial intelligence simulation-based circulating water channel earthquake simulation test system of claim 1, wherein the contact type sensor comprises an acceleration sensor, an optical displacement sensor, a magnetic field sensor, an ADV flow rate meter, a turbidity meter, a laser ranging matrix, a capacitive wave height meter and a pore water pressure meter array; the acceleration sensor is arranged on the bottom surface of the vibration carrier plate and is used for measuring acceleration response of the vibration table and the stainless steel sandbox in three directions; A plurality of optical displacement sensors are arranged on the base of the electromagnetic vibration table supporting column and the bottom surface of the vibration bearing plate and are used for measuring the displacement of the vibration table in three directions; the magnetic field sensor is arranged close to the electromagnetic driving device and is used for monitoring the magnetic field intensity around the electromagnetic driving device; an ADV flow rate meter, a turbidity meter and a uniform capacitance wave height meter extend into the circulating water tank from the opening end of the main body, the ADV flow rate meter measures three-dimensional flow rate distribution of different positions in the water tank and the sand sedimentation tank in real time, the turbidity meter monitors real-time change of sediment concentration in the circulating water tank main body, and the capacitance wave height meter measures water surface fluctuation; The laser ranging matrix comprises a plurality of laser displacement sensors which are arrayed and arranged at the opening end of the circulating water tank main body in a regular grid mode; The pore water pressure gauge array comprises a plurality of pore water pressure gauges which are all buried in the stainless steel sandbox and are used for measuring pore water pressure distribution and change of the pore water pressure in the sand; The non-contact optical measurement equipment comprises a high-speed camera and a high-definition video recorder, wherein the high-speed camera and the high-definition video recorder are respectively erected at the opening of the main body of the monitoring circulating water tank, the high-speed camera is used for capturing fine processes of sand movement, water turbulence or high-speed deformation of the structural model, and the high-definition video recorder is used for recording the dynamic state of the whole test section.
  7. 7. The electromagnetic drive and artificial intelligence simulation-based circulating water channel earthquake simulation test system of claim 1, wherein the intelligent control and data processing center comprises a central control unit, an intelligent waveform generation module and an AI image processing unit; the central control unit uniformly schedules the start and stop, parameter setting and operation synchronization of the triaxial electromagnetic earthquake simulation subsystem, the wave making and rectifying system, the downstream water circulation and processing system, the non-contact optical measurement equipment and the contact sensor; the intelligent waveform generation module is embedded into a machine learning algorithm, learns and simulates the characteristics of a real earthquake spectrum, and generates a multidirectional driving signal meeting the experimental requirements; the AI image processing unit operates in real time on high-speed photography and video data to extract full-field displacement, strain field and flow velocity field distribution.
  8. 8. The test method of the circulating water channel earthquake simulation test system based on electromagnetic driving and artificial intelligence simulation according to claim 1 is characterized by comprising the following steps: step S1, test preparation, namely paving a sand sample in a stainless steel sandbox according to test design requirements, and injecting test water into a water tank through a water injection pipeline until the water level reaches a preset height; Step S2, initializing a system, and checking the connection state and the working normality of a circulating water tank main body, a triaxial electromagnetic earthquake simulation subsystem, a wave-making and rectifying system, a downstream water circulation and processing system, non-contact optical measurement equipment and a contact sensor; Saturated treatment is carried out through a sandbox water outlet, and a sand sample is kept stand to reach a stable state; Calibrating an acceleration sensor, a pore water pressure meter array, an ADV (automatic dependent variable velocity) flow velocity meter, a laser ranging matrix, a high-speed camera and a high-definition video recorder; The intelligent control and data processing center sets test stopping conditions; step S3, selecting a dominant similarity criterion according to a test study object, and setting initial test parameters of the circulating water channel earthquake simulation test system according to the selected dominant similarity criterion; s4, converting the actual environmental parameters into test environmental parameters according to the dominant similarity criteria determined in the step S3; step S5, the central control unit triggers a triaxial electromagnetic earthquake simulation subsystem, a wave-making and rectifying system, a downstream water circulation and processing system, non-contact optical measurement equipment and a contact sensor, and data acquisition is carried out at the same time; step S6, the central control unit analyzes the sensor data in real time, performs seismic vibration denoising processing on the original measured value by using an AI algorithm, judges whether a preset test termination condition is met or not based on the denoised data, and enters step S7 if the test termination condition is met, and if the test termination condition is not met, the denoising processing is continued; the data denoising method specifically comprises the steps of carrying out frequency domain filtering on an original flow velocity signal measured by an ADV flow velocity meter and combining high-precision seismic platform vibration data output in the step S5, and eliminating periodic disturbance caused by an earthquake to obtain a purer water flow velocity value; Filtering pressure fluctuation components directly caused by earthquake vibration in data acquired by a pore water pressure gauge array; Step S7, the AI image processing unit is utilized to process and intelligently analyze the data determined in step S6, specifically, Performing particle image velocimetry and digital image correlation analysis on the acquired image data by using an AI image processing unit, and extracting full-field flow velocity, displacement and strain fields; Carrying out multi-physical field coupling analysis of sediment transportation, soil liquefaction and structural response by combining sensor data; Performing three-dimensional reconstruction and intelligent recognition on bed surface evolution based on a deep learning algorithm to generate real-time three-dimensional landforms and display flow field characteristics; and S8, ending the test, closing the triaxial electromagnetic earthquake simulation subsystem, the wave making and rectifying system, the downstream water circulation and processing system, the non-contact optical measurement equipment and the contact sensor, and starting the sand pump to remove the sediment accumulated in the sediment tank.
  9. 9. The test method of the circulating water channel earthquake simulation test system based on electromagnetic driving and artificial intelligence simulation according to claim 8, wherein in step S3, dominant similarity criteria are selected and initial test parameters are set according to test study objects, specifically: If the research object is a structural object seismic response, preferentially ensuring that the structural geometric similarity is similar to the seismic power, and firstly determining the size of a structural model and the seismic wave input spectrum; If the research object is sediment scouring, the starting similarity and the water flow movement similarity of sediment particles are preferentially ensured, and the sediment particle size and the water flow speed of the model are firstly determined; if the research object is seabed liquefaction, the soil body dynamic similarity and pore water pressure response similarity are preferentially ensured, and the earthquake vibration intensity and saturated sand parameters are firstly determined; After the dominant similarity criterion and the initial test parameters are determined, the influence of other secondary similarity quasi-tests on the test results is continuously evaluated, the similarity criterion with the smallest influence on the test distortion is selected for approximation processing, and finally all the test parameters are determined.
  10. 10. The test method of the circulating water channel earthquake simulation test system based on electromagnetic driving and artificial intelligence simulation according to claim 9, wherein the step S4 of performing wave flow and earthquake coupling simulation comprises the following steps: Step S41, if the research object is a structural seismic response, converting an actual seismic spectrum into a test seismic spectrum according to a seismic power similarity criterion preferentially, and then converting an actual wave parameter and a water flow parameter into test values according to a geometric similarity and water flow motion similarity criterion while considering the influence of the seismic power similarity criterion on the hydrodynamic similarity; if the research object is sediment scouring, converting the actual water flow parameters and wave parameters into test values according to sediment starting similarity and water flow motion similarity criteria preferentially; If the research object is seabed liquefaction, the seismic vibration intensity and saturated sand parameters are determined preferentially according to the soil body dynamic similarity and pore water pressure response similarity criteria; Step S42, starting the water pump and the wave generator, setting converted wave parameters and water flow parameters through the central control unit, homogenizing the incoming flow by the rectifying device, and monitoring and adjusting the wave parameters and the water flow parameters in real time until a stable hydraulic environment meeting test requirements is formed; step S43, the central control unit continues to set the converted test seismic spectrum and converts the test seismic spectrum into a triaxial driving signal; And S44, starting a triaxial electromagnetic earthquake simulation subsystem, respectively applying horizontal and vertical vibration to the magnetic driving end and the vertical magnetic driving end through the horizontal and vertical vibration, and reproducing earthquake waveforms along the preset degree of freedom by the vibration bearing plate under the guidance of the elastic roller guide rail.

Description

Electromagnetic drive and artificial intelligence simulation-based circulating water channel earthquake simulation test system and test method Technical Field The invention relates to a circulating water tank earthquake simulation test system and a circulating water tank earthquake simulation test method based on electromagnetic driving and artificial intelligence simulation, and belongs to the technical field of hydraulic engineering, coastal engineering, geotechnical engineering and earthquake engineering experiments. Background In the field of earthquake simulation tests, in particular to a test scene of underwater environment or multi-environment coupling effect, an earthquake simulation water tank and a vibration table are core devices for carrying out related researches, and the reliability and the accuracy of test results are directly determined by the performance of the earthquake simulation water tank and the vibration table. At present, a hydraulic driving or electric servo driving technical scheme is commonly adopted in a traditional earthquake simulation water tank or a vibration table, such as a hydraulic driving vibration table system for water tank experiments, an electric servo driving underwater earthquake simulation vibration table device and a large-scale simulation test system for simulating combined actions of earthquake, wave and ocean current, which are disclosed in a patent CN110206012A, a patent CN112146838A and a patent CN104020007B, wherein the patent schemes represent the main technical directions in the current field. However, the conventional driving schemes and test systems constructed based on the conventional driving schemes have a plurality of inherent defects, the increasingly-improved accurate simulation requirements are difficult to meet, and the hydraulic driving scheme has the advantages of providing huge thrust, but short plates which are difficult to overcome, such as slow response speed, usually more than 10ms, cannot accurately reproduce rich high-frequency components (frequency >20 Hz) in seismic waves, lower control accuracy, waveform distortion degree more than 5%, difficulty in meeting the accuracy requirements of complex seismic wave simulation, higher energy consumption, leakage risk of oil and easiness in polluting experimental environments. The hydraulic drive scheme employed by prior art CN110206012a and patent CN104020007B all suffer from the above-mentioned problems. Although the patent CN104020007B realizes the simulation function integration of the combined action of earthquake, wave and ocean current, the earthquake simulation device of the system still realizes the vibration by converting and controlling the horizontal actuator and the vertical actuator through the three-stage servo valve, is basically limited by the inherent defect of a hydraulic system, has response speed which is difficult to break through millisecond, has control precision limited by factors such as oil compressibility, pipeline loss and the like, and has limited waveform reproduction precision. Compared with hydraulic drive, the electric servo drive scheme has improved control precision, such as the electric servo drive structure adopted in patent CN112146838A, but the electric servo drive scheme still has the defects in realizing the performance of multi-axis (triaxial and above) coupling motion and high-frequency response (frequency >50 Hz), and the existence of mechanical transmission gaps and inertial delay leads to insufficient waveform reproduction fidelity, particularly when simulating high-frequency and multi-direction compound earthquake vibration, the phase error and waveform distortion phenomenon are obvious, and the high-precision multi-direction earthquake simulation requirement cannot be met. Besides the inherent defects of a driving mode, the traditional earthquake simulation test device and system also have a plurality of matched technology short plates, the observation means seriously depend on a contact sensor, are limited in distribution and interfere with a model, are difficult to acquire full-field continuous deformation and flow data, influence the integrity and accuracy of test data, lack a scientific matched method in the aspect of test design, lack effective basis of similar rule selection in the process of multi-parameter collaborative test simulation of earthquakes, water currents, waves, silt and the like, cause serious distortion of part of key parameters (such as earthquake input frequency spectrum, sediment transport rate, structural power response and the like) in the test process, and are difficult to accurately reproduce actual field working conditions, and the termination condition of the traditional scouring test is usually dependent on single direct observation quantity, cannot respond to the dynamic characteristics of the scouring process, is easy to cause experiment termination time deviation and influence the scientificity of test results.