34 results about "Seismic to simulation" patented technology

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 seismic simulation test device based on an electro-hydraulic servo system. The device comprises a vibration table foundation, a shear wall, a bearing guide rail supporting system, an exciter, a transmission part, a horizontal table and a model box. The bearing guide rail supporting system comprises a number of bearing units. Each bearing unit comprises a bottom plate, a positioning frame and a cover plate, wherein the bottom plate, the positioning frame and the cover plate are arranged in order from bottom to top. A roller is arranged in the positioning frame. The bearing guide rail supporting system is connected with the vibration table foundation through the bottom plate. The horizontal table is connected with the cover plate. The model box is placed on the horizontal table. The exciter is arranged on the shear wall. The transmission part is connected between the exciter and the horizontal table. The force generated by the exciter is transmitted to the horizontal table, goes down to successively pass through the cover plate, the roller and the bottom plate to the vibration table foundation, and is transmitted up to the model box. A control system collects and analyzes data to realize seismic simulation. The device has the advantages of easy installation and disassembly, low production cost and good integrity, and provides uniform multi-zone support to reduce stress concentration.

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 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.

The invention relates to a simulating device and a simulating method for groundwater seepage near a coastal zone under the effects of earthquake and sea tide. The device is mainly composed of a constant water head water supply device, a seepage tank, a tide generator, a salt water tank, an earthquake simulating shaking table and simulation well steel tubes, wherein the tank body can be divided into a fresh water area, a water-containing medium area and a seawater area along the length, for the water-containing medium area, water and sand are added for constructing a pressure-bearing water-containing layer, the medium of a water-resisting layer is clay, and in the salt water tank, tap water in which NaCl and carmine pigment are added is used for simulating colored seawater. According to themethod provided by the invention, the tap water is injected into the fresh water area through a constant water head and is injected into the seawater area through the tide generator; when the seawater wedge is stable, the frequency, acceleration, waveform and principal earthquake time are set on the earthquake simulating shaking table, vibration waves are loaded for starting a vibration seepage experiment, monitoring data is collected in real time, and the change process of the fresh-water-salt water interface and the water level of a pressure measuring pipe is observed. With the device and the method provided by the invention, the objective simulation and representation for the dynamic change of groundwater under the effects of earthquake waves, sea tide and the water-containing medium can be realized.

The invention provides a microseismic monitoring analog system which belongs to the field of micro-vibration generation and monitoring. The microseismic monitoring analog system comprises a simulation experiment fracturing device, a microseismic signal detection device and a microseismic simulation acquisition device. The simulation experiment fracturing device is used for generating fracturing fractures and sending out a microseismic signal. The microseismic signal detection device is used for detecting the microseismic signal and converting the microseismic signal to an analog electrical signal. The microseismic simulation acquisition device is sued for controlling the simulation experiment fracturing device and processing the analog electrical signal generated by the microseismic signal detection device. According to the invention, the problem that a general microseismic simulation monitoring system has poor simulation accuracy and poor precision is solved, the field well fracturing three-dimensional microseismic monitoring process can be simulated realistically, and the system has certain instructive effect on actual microseismic exploration.