124 results about "Earthquake simulation" patented technology

The invention provides a dynamic-fluid coupling effect induced earthquake simulation test device and a test method. The test device comprises a dynamic true triaxial electromagnetic Hopkinson bar system, a sealed loading system and a data monitoring and control system, wherein the dynamic true triaxial electromagnetic Hopkinson bar system is used for acting on a simulated fault sample and simulating a true triaxial stress state and multi-axis and multi-direction power disturbance of an underground fault; the sealed loading system is used for pressurizing and injecting fluid into the simulated fault sample and sealing the fluid under dynamic and static combined loading of the simulated fault sample; the sealed loading system is matched with the dynamic true triaxial electromagnetic Hopkinson bar system to load dynamic disturbance to a simulated fault sample containing fluid, simulate a fault stress state in an underground engineering project involving fluid activity and perform a dynamic-fluid coupling effect induced earthquake simulation test. According to the invention, the true triaxial stress state and the multi-axis and multi-direction power disturbance of the underground fluid-containing fault can be simulated.

The embodiment of the invention provides a slope instability mechanism simulation experiment device under the earthquake and rainfall coupling effect, and relates to the technical field of earthquake simulation equipment. The slope instability mechanism simulation experiment device under the earthquake and rainfall coupling effect comprises a model storage mechanism, a driving transmission mechanism and an adjusting mechanism, the driving transmission mechanism is located at the lower end of the model storage mechanism and enables a model in the model storage mechanism to vibrate, and the adjusting mechanism is located at the lower end of the model storage mechanism and enables the model in the model storage mechanism to vibrate. The adjusting mechanism is located at the lower end of the model storage mechanism and located in the middle of the transmission mechanism, and the transmission mechanism moves upwards and drives the adjusting mechanism to rotate. According to the device, the matching position and state of the cam and the vibration convex plate can be accurately changed, so that the vibration amplitudes of the slope toe, the slope top and the two sides of the slope body of an experimental model are accurately adjusted, the requirements for slope vibration amplitude simulation under different experimental conditions are met, and the influence of the vibration amplitudes on a slope instability mechanism can be deeply researched.

The invention relates to the technical field of rock mass earthquake dynamic response, and discloses a layered rock mass earthquake dynamic response multi-scale monitoring system and method, and the system comprises a rock mass three-dimensional geological module, a simulation setting module and an earthquake simulation module. The method comprises the following steps: establishing a layered rock mass three-dimensional geologic model; the method comprises the following steps: identifying a dangerous rock mass structural surface, monitoring slope displacement, and installing sound emission monitoring equipment at a key position to form a three-dimensional monitoring network; a layered rock mass and a broken area in the layered rock mass three-dimensional geological model are divided into discrete element areas, and a continuous medium area is divided into finite difference areas; coupling the discrete element region and the finite difference region; inputting the seismic wave as a dynamic boundary condition into the finite difference region, transmitting a response to the discrete element region through a coupling interface, and simulating a rock stratum and rock mass dynamic fracture process; and the crack propagation particle size and the original stress propagation are transmitted to the cloud platform. The geometric morphology and the internal structure of the rock mass can be accurately reflected.

The invention discloses an L-shaped wind wave flow-earthquake simulation system and method suitable for a high gravity field, the simulation system comprises a model box, a wind generation system, an L-shaped wave generation system, a flow generation system and a vibration seabed model, and the model box is used for accommodating and installing each system and is arranged on a rotating arm of a centrifugal machine in an up-and-down swinging manner; the wind generation system is used for forming horizontal airflow circulation, the L-shaped wave generation system is used for generating waves, the flow generation system is used for generating flow, and the vibration seabed model is used for researching interaction between a maritime work structure and seabed soil under various sea conditions. The simulation system can reproduce sea wind, wave, ocean current and earthquake scenes in a high gravity field.

The invention discloses a simulation experiment method for evaluating excavation of a water storage side slope, which belongs to the field of side slope engineering and comprises the following steps: S1, configuring similar materials of a physical model; s2, manufacturing a physical model box; s3, filling and curing; s4, installing a data acquisition system; s5, carrying out an excavation simulation test, a water storage physical simulation test and a seismic oscillation simulation test; and S6, analyzing and researching deformation and damage characteristics and rules of the slope body and the fault tectonic zone under the action of excavation disturbance, water storage and seismic oscillation according to a simulation result. On the basis of analysis of slope engineering geological conditions, according to a similarity principle and a similarity criterion, slope body excavation disturbance, water storage and seismic oscillation simulation tests are carried out, and deformation and damage characteristics and laws of a slope body and a fault tectonic zone under the action of excavation disturbance, water storage and seismic oscillation are studied; and the deformation and damage conditions of the prototype slope are restored according to the similar constants.

The invention discloses a transmission tower vulnerability analysis method and system based on seismic simulation, and belongs to the technical field of electric power facility disaster prevention, and the method comprises the steps: correcting bedrock seismic oscillation parameters based on equivalent shear wave velocity, and generating a high-precision earth surface PGA distribution diagram; automatically positioning a key node layer through eigenvalue decomposition, reducing the order of the three-dimensional model of the power transmission tower into a two-dimensional series multi-degree-of-freedom model, and outputting a layer mass vector, a condensation stiffness matrix and rod piece bending stiffness; performing time-history analysis by using the corrected PGA-driven reduced-order model to generate an earthquake damage probability; the multi-source remote sensing data and the PGA are fused, the landslide space probability is output through a deep learning model, and the impact strength and the landslide kinetic energy are calculated to judge the landslide damage probability; and based on the dual-threshold condition triggering probability union set, calculating a comprehensive damage probability, and generating a three-dimensional vulnerable curved surface. According to the method, the problems of high missing report rate and low calculation efficiency of single disaster assessment are solved, and minute-level accurate early warning of the composite disaster risk of the power transmission tower is realized.

The invention discloses a sound wave full waveform inversion method and system based on optimization effective boundary storage, and the method comprises the steps: constructing an initial geological velocity model, and obtaining seismic wave parameter information; performing forward modeling according to the initial geological velocity model and the seismic wave parameter information to obtain seismic simulation data and forward seismic source wave field data; acquiring actual seismological observation data of the geologic model to be measured, and constructing an objective function according to the actual seismological observation data and the seismic simulation data; re-sampling the wave field data of the target area according to the forward seismic source wave field data; restoring the resampled wave field data of the target area to an original data state by using an interpolation method, and then reconstructing a forward transmission seismic source wave field; zero-delay cross-correlation is carried out according to the reconstructed forward transmission seismic source wave field and the reconstructed backward transmission residual wave field to obtain a gradient; and carrying out iterative updating on the target function by adopting a gradient optimization algorithm until a final geological velocity model is output.

The utility model belongs to the field of vibration tables, particularly relates to an earthquake simulation vibration table considering the influence of a soil structure, and provides the following scheme aiming at the problems that the time for mounting and dismounting models is prolonged and the experiment flexibility and the working efficiency are reduced due to the fact that building models with different sizes cannot be quickly and conveniently clamped and fixed by the conventional vibration table. The device comprises a supporting table and a table base, four supporting bases are fixedly arranged at the bottom of the supporting table in a rectangular shape, and a vibration machine is fixedly arranged in the center of the top of the supporting table; the clamping assembly is arranged in the pedestal and is used for clamping a building model; the buffering assembly is arranged on the supporting base and used for buffering vibration generated when the device works. According to the utility model, through the arrangement of the clamping assembly, building models with different sizes can be rapidly and conveniently clamped and fixed, so that the time for mounting and dismounting the models is reduced, and the experiment flexibility and the working efficiency are enhanced.

The invention discloses a portable simulated earthquake demonstration device, which comprises a simulated motion device, an information acquisition device and a control device, and is characterized in that the simulated motion device is used for simulating earthquake motion, the information acquisition device is arranged on the side of the simulated motion device, and the information acquisition device acquires information of the simulated motion device and controls the simulated motion device to move. The information acquisition device acquires information and transmits the information to the control device, the control device receives the information from the information acquisition device, processes the information, transmits the processed information to the simulation motion device and controls the simulation motion device to move, and the simulation motion device, the information acquisition device and the control device are connected through a connecting assembly. The earthquake simulation demonstration device and the control device are carried in a split mode, the problem that an existing demonstration device cannot simulate the vibration effect of acceleration of different frequencies in an actual earthquake is solved through built-in different types of earthquake waves, the earthquake simulation demonstration device can serve as an earthquake disaster demonstration device or an earthquake prevention and vibration reduction product demonstration device, and the earthquake simulation demonstration device is convenient to use. And beneficial help is provided for disaster prevention and reduction and earthquake-resistant teaching and display.

A model predictive control method for a seismic simulation shaking table, comprising: S1: acquiring offline data of input signals and output signals of a seismic simulation shaking table; S2, on the basis of the acquired offline data, using sparse regression to identify a kinetic equation of the seismic simulation shaking table; and S3, on the basis of the kinetic equation, predicting output signals of the seismic simulation shaking table under different input signals, and using an optimization model to correct the input signals; moreover, on the basis of real-time data of the input signals and the output signals collected by the seismic simulation shaking table in the control process, performing parameter updating on the kinetic equation; and repeating the processes of prediction, optimization of input signals, and parameter updating until a preset target signal has been reproduced. The method has good precision and stability, and can effectively improve the control performance of the seismic simulation shaking table. The present invention further relates to a model predictive control system for a seismic simulation shaking table, a medium, and a terminal.

The invention provides an earthquake nucleation seismic phase identification and model training method and system, a terminal and a medium, and particularly relates to the technical field of data monitoring. Performing feature extraction on the to-be-measured seismic data to obtain a plurality of types of data features; a trained machine learning model is utilized to process the data features, a plurality of seismic phase moments are determined, and the machine learning model is obtained through training based on seismic simulation data of different roughness; and based on the seismic phase moment, obtaining an earthquake nucleation seismic phase identification result. According to the scheme, the seismic simulation data with different roughness are used as training samples to train the model, so that the diversity and data volume of the training samples are increased, and the generalization ability of the model is improved; and meanwhile, the machine learning model has the capabilities of processing complex time sequence data and multi-target prediction, so that the trained model has good prediction capability, can process the complex time sequence data and is beneficial to improving the nucleation seismic phase recognition precision.

The invention discloses a three-dimensional seismic simulation method based on a residual Fourier neural operator. The invention provides an embedded physics data-driven deep learning seismic wave field simulation technology. According to the method, a Fourier wave propagation operator structure is embedded into a convolutional neural network structure, and wave propagation simulation is alternately carried out in a spatial domain and a wavenumber domain. Due to the fact that the network structure conforming to the wave field propagation mode is adopted, and the implied wave field propagation mechanism in the data can be automatically met, the efficiency of the deep learning seismic simulation method is greatly improved, the requirements of the deep learning seismic simulation method for the training data volume and the training time are reduced, and meanwhile the generalization performance of a deep learning model can be enhanced. Compared with a classic finite difference numerical solution, the method has the advantages that the operation efficiency is higher, the occupied storage space is smaller, the method is not restrained by the space grid size and the time step length, and the method is more suitable for large-range high-frequency complex medium seismic wave simulation requirements.

The invention belongs to the technical field of earthquake simulation tests, and particularly relates to a fault dislocation testing device and method for a three-dimensional earthquake test, and the fault dislocation testing device is composed of two beveling models which are in the same form and are beveled on a cube along diagonal lines of an upper square surface and a lower square surface of the cube. The contact surface of the two beveled models, namely the opposite surface formed by beveling the two beveled models along the diagonal line, is a fault surface, and the fault models are arranged according to different test methods. The experimental device comprises the fault models, a strain observation system, an acoustic emission monitoring system, an active acoustic emission observation system and a laser total reflection fault monitoring system; according to the invention, a laboratory earthquake experiment can be realized, a laser total reflection fault observation system is researched and developed on the basis of a stress-strain observation device and an active and passive acoustic emission device, and synchronous monitoring of fault stress-strain, acoustic emission signals, displacement and fault surface contact conditions can be realized at the same time.

The invention relates to the technical field of co-seismic landslide risk evaluation, in particular to a near-fault single co-seismic landslide motion range mapping method and system. The method comprises the following steps: acquiring fracture structure data of a research area; positioning a main seismic fracture based on the fracture structure data, and performing fracture mechanism analysis to obtain seismic source parameter data; constructing a fault geometric structure and earth crust medium structure model containing a three-dimensional terrain based on the fracture structure data and the seismic source parameter data to obtain three-dimensional structure model data; and setting fault source parameters and stratum velocity medium parameters based on the source parameter data and the three-dimensional structure model data to obtain seismic simulation input parameters. According to the method, the whole process of near-fault co-seismic landslide from seismic triggering to accumulation is accurately reproduced through an integrated physical driving simulation frame, the three-dimensional motion range and the danger partition are evaluated in a high-precision mode, and a reliable basis is provided for risk evaluation and disaster prevention decision making.

The invention discloses a frequency band extension type composite vibration table control system and method based on MRAC-TVC, and the system and method are applied to a frequency band extension type composite vibration table which comprises a lower-layer low-frequency vibration table, a low-frequency long-stroke servo actuator, an upper-layer high-frequency vibration table and a high-frequency short-stroke servo actuator. The control system comprises a lower-layer low-frequency table control system and an upper-layer high-frequency table control system, the lower-layer low-frequency table control system comprises a lower-layer low-frequency vibration table, a low-frequency long-stroke servo actuator, a low-frequency table inner closed-loop subsystem and a low-frequency table outer closed-loop subsystem; the upper-layer high-frequency table control system comprises an upper-layer high-frequency vibration table, a high-frequency short-stroke servo actuator, a high-frequency table inner closed-loop subsystem and a high-frequency table outer closed-loop subsystem. According to the invention, not only is the robustness of the earthquake simulation vibration table system to cope with the load change under the influence of the dynamic response of the experimental structure increased, but also the experimental structure can be prevented from being damaged too early.

The invention relates to the technical field of earthquake simulation platforms, and discloses an earthquake simulation platform monitoring device for an engineering structure, and the device comprises an earthquake simulation platform which is installed on the top surface of a bottom plate; the mounting frame is fixed on the bottom plate, and the mounting frame is of a U-shaped structure; the electric hoist is mounted at the top of the mounting frame; the counterweight structure is arranged above the earthquake simulation platform, the counterweight structure comprises a counterweight water tank, the top surface of the counterweight water tank is connected with four branch slings, and the driving end of the electric hoist is connected with a main sling. According to the load adjusting mode, a traditional weight stack adjusting method is abandoned, the adjusting mode replaces the traditional weight stack adjusting method, operation is simpler, the load adjusting requirement can be quickly responded, and the working efficiency and flexibility are improved.

The invention discloses a hydraulic earthquake simulation vibration table which comprises a vibration platform, a plurality of hydraulic actuators, a hydraulic oil pump and a conveying pipe. The actuator is composed of a horizontal excitation source horizontally connected with the vibration platform and a vertical excitation source vertically connected with the vibration platform, and the hydraulic actuator is hinged to the vibration platform through a connecting device. The hydraulic earthquake simulation vibration table is a three-direction six-degree-of-freedom simulation vibration table and is composed of two actuators in the X direction, two actuators in the Y direction and four actuators in the Z direction, and real earthquake waves can be simulated more truly so as to detect the earthquake resistance of an object.

This invention provides a root-based slope erosion simulation device, comprising: a slope simulation unit for establishing a slope simulation test environment with different slope gradients, including an adjustable slope, on which a test area with slope-protecting vegetation is formed; a rainfall erosion simulation unit for providing various rainfall conditions to the test area; an earthquake simulation unit for providing various earthquake conditions to the slope simulation unit; an erosion material collection unit for collecting erosion material discharged from the test area during the test and measuring its weight; and a data collection and analysis unit for analyzing the impact of different test conditions on slope erosion and root-based slope protection effects based on the collected response data and measured weight of the test area under different test conditions. These different test conditions include different rainfall, earthquake conditions, and their coupling. This invention can conduct erosion simulation tests on root-based slope protection with different slope gradients under different rainfall and earthquake coupling conditions, accurately evaluating the effectiveness of root-based slope protection.

The invention discloses an earthquake-induced high-speed train derailment whole process state test simulation system. A vehicle-track-lower foundation structure model comprises a lower foundation structure model, a track system model and a vehicle model; the acceleration system is located at one end of the track system model; the braking system is located at the other end of the track system model; the earthquake simulation device is connected to the lower foundation structure model; the monitoring system comprises a vehicle-mounted monitoring subsystem and a trackside monitoring subsystem. And the data acquisition system is used for acquiring and processing monitoring data of the monitoring system. The method is used for solving the problem that in the prior art, accurate reproduction of the whole derailment process of the high-speed train under the earthquake condition and effective assessment of the damage of the post-earthquake track structure system cannot be achieved, and the purposes of accurate reproduction of the whole derailment process of the high-speed train induced by the earthquake and effective assessment of the damage of the post-earthquake track structure system are achieved.

The present application relates to the field of earthquake site rescue warning, and relates to a real-time early warning method for secondary collapse risk of RC frame semi-rubble structure under aftershock. The core content of the method includes four modules. Module 1: using the method of seismic simulation shaking table, the whole process of RC frame structure from perfect to semi-rubble to secondary collapse is realized by simulating main-aftershock action, and time history data of dynamic response of secondary collapse structure is obtained. Module 2: high-dimensional continuous horizontal moving time window method is used to process the time history data of dynamic response of structure and obtain the dynamic response characteristics of RC frame semi-rubble secondary collapse structure. Module 3: K-Means machine learning algorithm is used to cluster the secondary collapse risk type of RC frame semi-rubble structure. Module 4: Informer machine learning algorithm is used to realize real-time early warning of secondary collapse risk of RC frame semi-rubble structure. The present application can scientifically and accurately distinguish and real-time predict the secondary collapse risk of RC frame semi-rubble structure under aftershock.

The invention relates to the technical field of amusement science and technology equipment suitable for a natural mountain and water ecological environment, and discloses a bridge-shaped earthquake simulation mechanism for tourism, and the mechanism comprises a bridge body which serves as a carrier of the earthquake simulation mechanism, and a plurality of modules are installed in the bridge body; the inclination module is used for simulating a ground inclination phenomenon caused by an earthquake; the cracking module is used for simulating ground cracking caused by earthquakes; the collapse module is used for simulating a surface collapse phenomenon caused by an earthquake; the translation and dislocation module is used for simulating transverse movement in an earthquake; the upheaval module is used for simulating a ground upheaval phenomenon caused by an earthquake; and the hammering and vibrating module is used for simulating earthquakes to generate vibrations with different frequencies. According to the design, the tourist can freely experience the earthquake scene of the simulation mechanism under the condition that the tourist does not wear a binding device, the tourist can quickly escape when experiencing the simulated earthquake, the teaching effect is achieved for the experiencer to quickly respond when the experiencer really faces the earthquake, and meanwhile, the unique tourism experience is obtained by feeling the impact brought by the earthquake.

The utility model relates to an interactive device for Qin bricks and Han tiles, which belongs to the technical field of Qin brick and Han tile display and comprises a solid wood platform, a solid wood stand column and a wood bracket are arranged on the solid wood platform, a straight purlin for displaying the Qin bricks and the Han tiles is arranged on the solid wood stand column and the wood bracket, and an earthquake simulation base is arranged at the bottom of the solid wood platform. According to the interaction device for the Qin brick and the Han tile, the earthquake simulation base is arranged, the feeding component is used for controlling the supporting frame to move left and right, so that the wood framework at the top of the solid wood platform and the Qin brick and the Han tile are driven to move left and right, and the lifting component is used for controlling the wood framework at the top of the solid wood platform and the Qin brick and the Han tile to move up and down; therefore, the vibration process of the wood framework and the laid Qin brick and Han tile in the earthquake is simulated, vibration is simulated through the up-down and left-right movement height, the earthquake simulation level can be adjusted through the control panel, the stability of the wood framework can be fully reflected, and therefore the interactivity of the Qin brick and Han tile on the wood framework is improved.

The application relates to the field of earthquake simulation and detection, and discloses a test model for simulating seismic soil evolution of a large-span bridge and a testing method, the test model comprising a vibration table, a large-span bridge model, a damping control device, a vibration mechanism and a cooperative control system, the large-span bridge model comprising a plurality of pier bases, the damping control device being fixedly connected between the pier bases and the vibration table; the vibration mechanism cooperatively drives the vibration table to vibrate in space; the cooperative control system comprises a processor, an acceleration sensor and a displacement sensor; the testing method comprises the steps of simulating an earthquake process by the vibration table, simulating soil evolution or different site geology by the damping control device, collecting acceleration and displacement data information of the damping control device in real time by the cooperative control system, and analyzing the structural response of the large-span bridge. The test model can simulate the seismic site effect and the bridge seismic response under non-uniform excitation, has high authenticity and accuracy, is widely applicable, and has low test cost.

The embodiment of the invention provides a slope instability starting simulation device under the action of a strong earthquake, and relates to the technical field of earthquake simulation equipment. A slope instability starting simulation device under the action of strong shock comprises a model storage mechanism, a four-corner vibration mechanism located at the lower end of the model storage mechanism and driving four corners of the model storage mechanism to synchronously generate vibration, and a unilateral vibration mechanism located at the lower end of the model storage mechanism and driving the model storage mechanism to synchronously generate vibration. The single-side vibration mechanism is located at the upper end of the four-corner vibration mechanism, so that the single-side vibration mechanism vibrates the front end or the rear end of the model storage mechanism and is coupled with an amplitude adjusting mechanism. The device can accurately simulate multiple modes such as four-corner synchronous jacking vibration, single-front-end single-side vibration and complex coupling vibration of an experiment model, further can accurately simulate various stress conditions possibly encountered by a side slope in an actual strong earthquake, and greatly improves the experiment precision.

The utility model discloses an operating table for simulating earthquake disasters, which comprises an earthquake simulation vibration table, a house model is arranged at the top of the earthquake simulation vibration table, a support column is fixedly mounted at the bottom of the earthquake simulation vibration table, the bottom of the support column is connected with a bottom support plate, the house model is composed of a plurality of floors, and the floors are connected with the house model. A bridging plate is fixedly mounted at the bottom of the floor, and the earthquake disaster simulation device relates to the technical field of earthquake disaster simulation, a house model is arranged on an earthquake simulation vibration table, and earthquake waves are simulated and emitted through a simulation earthquake signal generator in the earthquake simulation vibration table, so that the disaster condition of the house model under an earthquake can be simulated; a plurality of dampers are jointly hinged between the floors, so that the different floors have corresponding swing amplitudes and directions during earthquake simulation, and the disaster conditions of the floors with different heights can be simulated.

The utility model discloses a roadbed design model based on highway design, which is applied to the technical field of highway design auxiliary equipment, and is characterized in that an earthquake simulation mechanism comprises a placing plate, a driving motor, a rotating shaft and a belt, and a plurality of springs are fixedly connected between the bottom of the placing plate and the top of a bottom plate; the device has the technical effects that the placement plate moves upwards under the action of the spring in the process that the longer parts of the convex blocks are far away from the lower part, so that the state of a longitudinal seismic wave is simulated for the model body in the process that the placement plate moves up and down, and the rotating shaft on the back surface of the model body rotates; the model body is driven by the rotating shaft to rotate, then the two protruding blocks on the rotating shaft are driven to rotate, the model body is pushed back and forth in the rotating process of the protruding blocks on the two rotating shafts, and seismic transverse waves can be simulated, so that researchers can simulate the state of a roadbed under the seismic condition, and then relevant personnel can fully know a design system of the roadbed conveniently.

The present application relates to a kind of mine earthquake internal seismic source power similarity simulation test system and method based on metal wire electric explosion, pre-embedded metal wire electric explosion is used to form transient volume expansion seismic source in similar material model inside, it is realized by the conversion of the accurate release energy source from the external monotone extensive mechanical disturbance to model inside;Through the division of labour design of charging branch, main discharge branch, discharge branch and detection branch, make circuit organization relationship clear, protection chain is complete, it is convenient to stable implementation high voltage pulse discharge test;Through the current limiting inductance to the discharge current front and pulse width are adjusted, so that mine earthquake simulation is no longer only pay attention to total energy similarity, also consider time process similarity;The corresponding relationship between the energy of field mine earthquake event and the input electric energy of similar material model is established, the scientificity of test parameter setting is improved;Through cabinet type layered assembly, host computer software control and standardization experimental process organization, the repeatability, traceability and safety of device operation are improved.

This invention relates to the field of seismic imaging technology and discloses a method, apparatus, equipment, and medium for forward modeling of seismic acoustic waves in a viscoelastic-acoustic (VTI) medium. The method includes: obtaining a desired Q value; calculating the viscoelastic velocity of the seismic acoustic wave based on the desired Q value; fitting parameters of a generalized standard linear body model; constructing a wave equation for the seismic acoustic wave in the VTI medium based on the generalized standard linear body model; and solving the wave equation for the seismic acoustic wave in the VTI medium using the finite difference method and the viscoelastic velocity. This invention solves the problem that traditional seismic simulations cannot simultaneously consider seismic anisotropy and seismic attenuation, significantly improving the accuracy and applicability of seismic simulations, as well as the accuracy of seismic simulations in complex terrain, geology, and oil and gas reservoir areas. It provides a foundation for subsequent high-precision seismic velocity modeling and seismic migration imaging.

The present invention relates to a protection device, and in particular to a protection device for earthquake simulation. The technical problem to be solved is: to provide a protection device for earthquake simulation with higher safety. The technical solution is: a protection device for earthquake simulation, including a frame, a rotating block, a pulling mechanism and a shockproof mechanism, a rotating block is symmetrically rotatably provided on the frame, a pulling mechanism is connected between the frame and the rotating block, and a shockproof mechanism is provided at the bottom of the frame. The present invention makes the protection performance of the device better through the cooperation between the pulling mechanism and the shockproof mechanism.

The invention provides a modular assembly type reaction wall capable of intelligently regulating and controlling electromagnetic adsorption, and belongs to the field of civil engineering test facilities, a reaction wall main body is formed by combining a plurality of standardized modules, multi-degree-of-freedom reconstruction between the standardized force bearing modules is realized through electromagnetic chucks, and a built-in load sensor feeds back a connection state in real time; and in cooperation with the matrix distribution design of the loading holes, a multi-form reaction wall structure can be quickly built according to test requirements. Each module unit comprises a concrete block, an embedded steel plate, an electromagnetic chuck, a loading hole and a load sensor. The device is characterized by comprising an electromagnetic adsorption interface with adjustable magnetic flux; a modular assembly error self-compensation mechanism is adopted; the invention discloses a distributed sensor network and an intelligent control system based on a PID algorithm. Compared with a traditional cast-in-place structure, the construction efficiency can be effectively improved, repeated disassembly and assembly of the modules are supported, the space adaptability is high, and the multi-scene test requirements of earthquake simulation, structure loading and the like are met.