34 results about "Seismic to simulation" patented technology

The embodiment of the invention provides a globally optimized staggered mesh finite-difference forward simulation method and device. The method comprises the steps that a staggered mesh finite-difference operator is obtained; a target function is established based on a maximized norm and is calculated to obtain a staggered mesh finite-difference decentralization coefficient for optimizing the staggered mesh finite-difference operator, wherein the staggered mesh finite-difference decentralization coefficient is calculated in the maximum wave number coverage range of the optimized staggered mesh finite-difference operator and under the maximum spectrum error margin of the optimized staggered mesh finite-difference operator; the calculated staggered mesh finite-difference decentralization coefficient is adopted to optimize the spatial staggered mesh finite-difference operator, and forward simulation of seismic waves is performed. By adopting the scheme, absolute spectrum errors of the optimized staggered mesh finite-difference operator are more flexibly controlled, numerical value frequency dispersion is more effectively constrained, and the seismic simulation precision is improved.

Method for correcting seismic simulations, RTM, and FWI for temporal dispersion due to temporal finite difference methods in which time derivatives are approximated to a specified order of approximation. Computer-simulated seismic data (51) are transformed from time domain to frequency domain (52), and then resampled using a mapping relationship that maps, in the frequency domain, to a frequency at which the time derivative exhibits no temporal dispersion (53), or to a frequency at which the time derivative exhibits a specified different order of temporal dispersion. Alternatively, measured seismic data from a field survey (61) may have temporal dispersion of a given order introduced, by a similar technique, to match the order of approximation used to generate simulated data which are to be compared to the measured data.

The invention discloses a building structure model seismic absorption and isolation technology demonstrator. The building structure model seismic absorption and isolation technology demonstrator comprises a building structure model, an upper seat plate (8) and a seismic simulation motion platform. The building structure model seismic absorption and isolation technology demonstrator is characterized in that one side of the upper seat plate (8) is fixedly connected with the building structure model, the other side of the upper seat plate (8) is fixedly connected with the seismic simulation motion platform, and two sides, which are connected with the seismic simulation motion platform, of the upper seat plate (8) are parallelly and fixedly provided with sliding blocks which are provided with sliding grooves; the seismic simulation motion platform comprises an engine base, a base shaking and driving device and a base, the engine base is provided with guide rails which are fitted with the sliding grooves, the base shaking and driving device comprises a turbine motor speed reducer (1), an output shaft (9), a flange sleeve (10), a base plate (11), a connection plate (12), a coupling (7) and an eccentric coupling (13), the output shaft (9) is in transmission connection, and the coupling (7) is internally provided with an eccentric sleeve (14). The invention aims at providing the building structure model seismic absorption and isolation technology demonstrator which is simple in structure and low in cost and is capable of directly showing all kinds of different anti-seismic phenomena showed by all kinds of seismic absorption buildings under the action of seismic waves.

The invention relates to a transformer substation composite material bushing anti-seismic limit bearing capacity parameter calibration method comprising the steps that seismic simulation vibration table testing and quasi-static bending resistance testing are performed on the first batch of products of composite material bushings so that anti-seismic limit bearing capacity Mse and anti-bending limit bearing capacity Mst are respectively obtained; the conversion coefficient r is calculated through the anti-seismic limit bearing capacity Mse and the anti-bending limit bearing capacity Mst; quasi-static bending resistance testing is performed on the products of the composite material bushings apart from the first batch of products so that anti-bending limit bearing capacity Mst' is obtained; and anti-seismic limit bearing capacity Mse' is obtained through the conversion coefficient r. The technical scheme has practical importance on anti-seismic performance detection of the composite material bushings.

The invention discloses a vehicular earthquake simulator based on a 4-RPS (Range Positioning System) space parallel mechanism. The vehicular earthquake simulator comprises a loading vehicle (1), a control console (2), a simulation room (3) and the 4-RPS space parallel mechanism (5), wherein the rear part of a driving cab of the loading vehicle (1) is provided with the control console (2); the simulation room (3) is installed on a rear vehicle body of the loading vehicle (1) through the 4-RPS space parallel mechanism (5); and the control console (2) is linked with the 4-RPS space parallel mechanism (5) to integrally form the vehicular earthquake simulator. The earthquake simulator is vehicular, simple in structure, flexible and accurate to control, and can be widely used for the floating science popularization of earthquakes in schools and communities.

The invention discloses a petrophysical parameter calculation method and system based on seismic wave simulation. The method can comprise the steps of: establishing an initial large-scale reservoir model according to core data, and thus, obtaining a large-scale reservoir model based on crack data and porosity data; establishing a small-scale grid based on the large-scale reservoir model, so that an equivalent elastic parameter model is obtained; and obtaining anisotropic parameters of a reservoir based on the equivalent elastic parameter model. According to the petrophysical parameter calculation method and system based on seismic wave simulation disclosed by the invention, petrophysical elastic parameters of a complex reservoir are obtained through a numerical value calculation method; the difficulty of obtaining cores different in geological characteristics can be avoided; and thus, small-scale non-uniform caused macroscopic physical parameter change is obtained.

The invention relates to a shaping method for an experimental grotto of an earthquake simulated vibration platform model. The method comprises the following steps of 1), manufacturing a wood mould with a grotto size consistent to an experimental request of a model, molding, additionally hardening and weighing a polystyrene foaming grotto model according to a model size, and wrapping a layer of polyvinyl chloride plastics on the surface of the grotto model; 2), drawing a grotto profile on a side wall in a model box according to a designed position for positioning, and fixing the borders of the grotto and the model box by the adoption of square wooden strips; 3), stuffing and symmetrically ramming around the grotto, and enabling the grotto model not to generate deviation; and 4), firstly digging the middle part of a grotto cross section, and then digging the edge and corner parts by utilizing the protection of plastic cloth on the outer layer of the model. By the adoption of the method, grottos with different shapes and sizes can be high-efficiently, simply and conveniently manufactured in model experiments, the accurate positioning of a grotto space is realized, the digging method is simple and convenient, and interference with model materials surrounding the grotto during the digging process is effectively reduced.

The invention discloses a seismic simulation shaking table test control method for cross-fault seismic waves. A power part and a pseudo-static part of cross-fault seismic waves are separated through afiltering method, high-frequency acceleration is input into a system in order to obtain a high-frequency displacement driving signal, and a low-frequency pseudo-static displacement time history is superimposed on the basis, so that a wide-frequency displacement driving signal is obtained and is input into the shaking table control system, a shaking table is controlled, and shaking table test simulation of the cross-section seismic waves is completed. According to the methods, the requirements of the two aspects of the acceleration and the pseudo-static displacement of the cross-fault seismicwaves are both considered, and the seismic simulation shaking table for the cross-fault seismic waves can be accurately reproduced.

The invention relates to a method for acquiring a seismic wave path through a wave equation. The method comprises the following steps that firstly, an initial parameter is given; secondly, a complex and non-uniform underground medium model to be explored is divided into mesh-shaped grid points; thirdly, a seismic source is placed in the seismic source point S of the model, and seismic wave fields in certain frequencies in the frequency band to be solved in the whole space are calculated point by point; fourthly, the seismic source is arranged at the receiving point R of the model, and the seismic wave fields in certain frequencies in the frequency band to be solved in the whole space are calculated point by point; fifthly, in the frequency domain, the calculated seismic wave fields at the seismic source point S and the receiving point R under the same frequency are multiplied and added to the multiplying result obtained under the previous frequency; sixthly, frequency circulation is carried out in the frequency band to be solved, and the seismic wave path is stored if the frequency circulation is finished. According to the method, the high-frequency approximation and multi-path problems of a traditional method are avoided, and the method can be widely applied to seismic simulation, seismic lighting and seismic offset technology in a complex geologic structure of oil exploration.

The invention discloses an artificial seismic simulation method based on the aseismic design of a hydraulic structures of hydropower projects, which comprises the following steps: selecting a standarddesign response spectrum as a target spectrum, discretizing the target spectrum, generating an initial seismic wave by a frequency domain method, performing iterative correction on the initial seismic wave by a time domain method, and performing iterative correction on the initial seismic wave by a frequency domain-time domain hybrid iterative method to determine whether the accuracy is satisfied, to determine whether three artificial seismic waves are generated, and to determine correlation coefficients. According to the requirements of the code for seismic design of hydraulic structures ofhydropower projects and the seismic design of hydraulic structures of hydropower projects, the artificial seismic simulation method based on the seismic design of hydraulic structures of hydropower projects is completed in this scheme, which has strong pertinence. The invention overcomes the limitation of poor convergence of the existing time domain method, and the artificial seismic wave generated by the invention has good convergence and high convergence precision.

The invention discloses a seismic simulator for teaching, which comprises a shocking module formed by a plurality of shocking blocks. The surface of the shocking module is provided with a simulated ground surface; the simulated ground surface is provided with simulated natural substances and/or simulated manmade substances; at least one longitudinal oil cylinder which can drive the corresponding shocking block to shock longitudinally is connected below each shocking block; each longitudinal oil cylinder is arranged on an oil cylinder carrying frame; each oil cylinder carrying frame is connected with a transverse oil cylinder which can drive the oil cylinder carrying frame to transversely shock; the oil cylinder carrying frame is arranged on a transverse sliding rail in a sliding mode; boththe transverse oil cylinder and the longitudinal oil cylinder are connected with a control chop; and the control chip is connected with a driving switch and a driving power supply. Longitudinal wavesof an earthquake are simulated through the longitudinal oil cylinder, transverse waves of the earthquake are simulated through the transverse oil cylinder, the simulation is intuitive and vivid, thestructure is simple, and the cost is low.

The present disclosure provides a method for modeling and analyzing the impact of different seismic surveying and imaging techniques on a subterranean formation by creating a black hole boundary condition around a particular region in the formation where at least one of the physical characteristics is unclear and may distort the seismic modeling results. The black hole boundary conditions will eliminate any energy wave that enters, exit or reflect off the region so as to avoid any image distortion caused by this region. The resulted image data is compared with the image data obtained without using the black hole boundary conditions to determine the impact of this region, and proper correction can be made to more precisely and accurately model the formation

The invention belongs to the field of earth exploration and information technology, and particularly relates to a parallel vector computing method of seismic acoustic wave equation, which includes: (1) seismic simulation; simulating the propagation process of the seismic wave field in underground media by computers and numerical method, which includes the following steps: (2) calculation of parallel acceleration; parallelization requirement analysis of seismic simulation projects, replacement of the special parts, which are the most time-consuming in the serial code and can be replaced by vector calculation, by AVX instruction set parallel code. The parallel vector computing method of seismic acoustic wave equation can not only simulate the seismic response characteristics and variation rules of high density acquisition, but also greatly save calculation instructions, and finally realize the ability of about 3-7 times secondary acceleration ratio.

The invention discloses a seismic shaking table data collection system based on Zigbee. The system forms a star-shaped wireless network by a plurality of data collection nodes and a coordinator node. The system also comprises a computer, and the coordinator node is connected with the computer by a USB. The data collection node comprises a strain collection node, a displacement collection node and an accelerated speed collection node. Main function of the computer is to receive the data of strain, displacement, and accelerated speed uploading from the coordinator node, and the uploading data are saved as files, and also these data can be used for analyzing and processing. Zigbee has the advantages that the cost of the node is low, the transfer integrated circuit of sensor is in the data collection node, the external transmitter is cancelled and the cost of the whole system are reduced. Because there is no need to onsite set up the signal line, the workload and the intensity of the work is greatly reduced.

The invention discloses a quakeproof training and seismic modeling experience cabin. The quakeproof training and seismic modeling experience cabin comprises a motion platform, wherein the motion platform is provided with an experience cabin; a specific scene is set in the experience cabin; furthermore, the experience cabin is internally provided with a display device and a voice frequency device; the bottom of the motion platform is connected with an earthquake simulator; the earthquake simulator comprises an X-direction vibration control part, a Y-direction vibration control part and a Z-direction vibration control part; the X-direction vibration control part is controlled by a pair of X-direction servo motors; the Y-direction vibration control part is controlled by a pair of Y-direction servo motors; the Z-direction vibration control part is controlled by a pair of Z-direction servo motors. According to the quakeproof training and seismic modeling experience cabin disclosed by the invention, the experience cabin is arranged on the earthquake simulator, the specific scene of the experience cabin can be set according to requirements, and the earthquake prevention and avoidance consciousness of experiencers can be really improved from the simulation of seismic reality scenes, so that the self-rescue knowledge of earthquake prevention and avoidance is added, and loss of earthquakes for lives and property is reduced.

The invention relates to the field of seismic experience, in particular to a seismic modeling device, comprising a seismic platform, four sides and a top wall. The four sides and the top wall encircleto form a closed space on the seismic platform. The seismic platform comprises a rectangular frame and vertical lifting devices mounted at four corners of the rectangular frame, and further comprisesa platform body, a first cross beam and two first motors, wherein the platform body is arranged in the rectangular frame and is connected with the left and right sides of the rectangular frame through springs, the first cross beam is mounted on the lower portion of the two sides of the platform body and parallel to the left and right edges of the rectangular frame, and the two first motors are connected with the front and back ends of the first cross beam. The seismic modeling device is further provided with a scene simulation escape device. The seismic modeling device is of skillful design and simple arrangement and has realistic seismic simulation effect; the scene simulation escape device can indicate and correct escape positions in different scenes for experiencers, and accordingly the seismic modeling device brings live-action experience and has high education function to users, and has high potential market value.