136 results about "Seismic tests" patented technology

The invention discloses a laminated shearing box. The objective of the invention is to solve the technical problem of difficulty to reflect actual seismic responses of soil layers of an existing shearing box. The laminated shearing box comprises a rigid base, a laminated box body, limiting mechanisms and side limiting plates; the rigid base is mounted on a vibration table; the laminated box body is located on the rigid base; the exteriors of two first side surfaces of the laminated box body are provided with the limiting mechanisms; the limiting mechanisms are fixed on the rigid base; the exteriors of two second side surfaces of the laminated box body are provided with the side limiting plates; the first side surfaces are parallel to the vibration direction of the vibration table; and the second side surfaces are vertical to the vibration direction of the vibration table. The laminated shearing box of the invention can be basically consistent with a prototype. With the laminated shearing box adopted, when pipelines buried at different depths are tested under seismic excitation or fault movement simulation, the actual seismic responses of the soil layers can be reflected, and therefore, the accuracy of the seismic tests of oil and gas pipelines can be improved.

The invention provides a comprehensive monitoring method for well and ground combined coal-seam hard top plate segmented hydraulic fracturing. An in-hole television detection technology is exerted andcombined with an audio electric perspective technology, the fracture development position and degree under the original condition are revealed, and the original low-group area of the working face isjudged. By means of a micro-seismic monitoring system, fracture development plane and profile distribution characteristics in the fracturing process are carried out in real time. After fracturing, in-hole television and audio electric perspective detection results are utilized, a micro-seismic test result is integrated, and the fracturing crack initiation position and direction and a fracture development scale and spreading form are obtained. The fracturing crack initiation position and direction are effectively disclosed, the fracture development scale and morphology are combined, precise design of a directional long drilling trajectory is achieved, a technical support is provided for parameter controllable providing, the drilling efficiency can be improved, and the drilling constructiondifficulty is reduced. The monitoring blind area and the blind section of a conventional method are avoided, the monitoring precision is greatly improved, and the fracturing effect is accurately evaluated.

The invention relates to the technical field of building test devices. The invention particularly relates to a civil engineering structure anti-seismic test device. The device comprises a bottom plate, a first side plate and a second side plate are arranged on the side face of the bottom plate. The first side plate and the second side plate are perpendicular to each other. Excitation motors are arranged on the inner side faces of the first side plate and the second side plate. A cam is arranged on an output shaft of the excitation motor; the excitation motor is arranged on the fixed plate; twosliding rods are arranged on the fixing plate, two sliding holes are formed in each of the first side plate and the second side plate, the sliding rods penetrate through the sliding holes, a threadedhole is formed below the position between the two sliding holes, a screw rod is connected into the threaded hole in a threaded mode, the inner end of the screw rod is connected with the fixing plate,and a longitudinal wave generating plate is welded to the upper ends of the stand columns together; according to the device, vertical longitudinal waves and horizontal transverse waves can be generated for simulating the earthquake state, the simulated longitudinal waves are closer to the earthquake state, and the accuracy of the earthquake resistance test is effectively ensured.

The invention discloses a vibration table substructure test method based on three-parameter control AMD, which belongs to the technical field of structure test and can be used in anti-seismic test ofmulti-story and high-rise building structures. On the basis of the existing hybrid experimental research, an AMD loading device (also called an active mass driver) is used as a means of applying an interface force between a numerical substructure and an experimental substructure, and the control precision of the AMD loading device is improved through a three-parameter control algorithm. Compared with the existing vibration table substructure test method, the test method disclosed by the invention has the advantages as follows: the test conditions can be easily met (no additional counterforce wall is needed); a vertical self-weight effect is provided while the problem of inertia mass loading is solved and the influence of the high-order vibration mode of an upper substructure is neglected (the mass of the AMD loading device can provide a weight); the test precision is high (the high-frequency performance of three-parameter control is excellent); the requirement on the stroke of an actuator is low (there is no need to track the displacement of the board of a seismic simulation vibration table).

The invention discloses a seismic test device and test method for an ultrahigh-voltage direct current single-pole composite post insulator. The seismic test device for the ultrahigh-voltage direct current single-pole composite post insulator comprises a vibrating table, a support installed on an installation platform of the vibrating table and a single-pole post insulator with the lower end installed on the installation platform of the support, wherein a counterweight is arranged at the upper end of the single-pole post insulator, a hardware fitting is arranged at the upper end of the counterweight, and at least one accelerometer and at least one strainmeter are arranged on the installation platform of the support; at least one accelerometer, at least one strainmeter and at least one displacement meter are arranged on the single-pole post insulator; at least one accelerometer is arranged on the hardware fitting; and at least one displacement meter is arranged on the installation platform of the vibrating table. The seismic test device and test method for the ultrahigh-voltage direct current single-pole composite post insulator are low in test cost, and can be used for effectively assessing the seismic performance of the single-pole post insulator.

The invention discloses a seismic test device for fabricated cold-formed thin-walled steel walls and an installation method thereof, which belong to the technical field of architectural engineering structure test. The seismic test device for fabricated cold-formed thin-walled steel walls includes a fabricated cold-formed thin-walled steel wall, a bottom beam, a loading top beam, a linear guide rail, an out-of-plane support device, jacks, a distributive girder, bottom beam pads, a reaction frame, high-strength bolts, anchor bolts, and the like. The out-of-plane support device is connected to the top beam of the reaction frame to constrain the wall and prevent the wall from being destabilized. The seismic test device for fabricated cold-formed thin-walled steel walls not only can make up for the shortcomings of the traditional wall test device, but also can accurately simulate the real boundary conditions of cold-formed thin-walled steel walls. The test result obtained is accurate and reliable. The safety risk in test and the test cost are effectively reduced. The seismic test device is of great practical significance in the test of fabricated cold-formed thin-walled steel walls.

The invention discloses a novel hybrid test method based on multi-scale model updating, and belongs to the technical field of structural engineering anti-seismic tests. The method comprises the following steps: step 1, discretizing a to-be-measured overall structure into a numerical model of the overall structure, and selecting a substructure for providing a model parameter updating part; step 2,solving a structure motion equation, carrying out nonlinear static analysis, and sending the calculated displacement on the boundary freedom degree of the test substructure to an actuator connected with the test substructure; step 3, loading the test piece by the actuator in the step 2 according to the displacement calculated by the finite element analysis software, and sending the actually measured displacement and counterforce to a parameter estimation module; step 4, carrying out online estimation on constitutive model parameters; and step 5, repeating the step 2 to the step 4 until the test is finished. Complex structures containing different types of components can be selected as test substructures, so that material hierarchy and component hierarchy numerical model parameter updatingcan be realized at the same time.

The present invention relates to a manufacture method of a karst pile foundation anti-seismic test testing device. The method comprises the following steps: (1) making a die frame; (2) performing prefabrication of a karst cave model; (3) making a model box, a model pile and a pile cap; (4) filling the model box: respectively laying one layer of cystosepiment at two surfaces in the model box in the direction perpendicular to the vibration direction prior to filling, fixing the karst cave model at the middle of the model box when filling model simulation materials into a preset position, and continuously filing and compacting the model simulation materials at the circumference of the karst cave; (5) fixing the model pile: after fixing and filling the karst cave, fixing the model pile at the centre position of the top plate of the karst cave, and continuously filling the model simulation materials to allow the lower end of the model pile to be embedded at a preset depth of the model simulation materials; and (6) installing the pile cap: after drying the whole model, installing the pile cap, configured to perform upper load applying and dispose weighs, at the upper end of the model pile. The manufacture method of a karst pile foundation anti-seismic test testing device is simple and reliable, easy to realize and low in manufacture cost.

The invention discloses a nuclear power station transformer gas relay seismic test method which includes the following process: conducting frequency conversion test which includes that relays are filled with transformer oil, an indication device is connected at a tripping point and arranged on a vibration table with the vibration test frequency as 8-20Hz sweep frequency, the frequency is maintained for 1 minute respectively on the X axis, the Y axis and the Z axis, the acceleration is over 0.25g, and an indication result of the indication device is recorded. By means of the nuclear power station transformer gas relay seismic test method, the anti-seismic performance of gas relays of various types is tested and evaluated, and the method can provide support for type selection of the transformer gas relays. Due to the fact that the gas relays are installed on a transformer, it is unreasonable to put forward an anti-seismic requirement or standard from the view point of the gas relays singly, and the anti-seismic requirement is put forward from the view point of the whole transformer. On the type selection of the transformer gas relays, the production safety requirement can be met as long as the anti-seismic parameters are not lower than the anti-seismic requirement of a main body transformer.

The present invention discloses a horizontal apparatus for component post seismic test. The apparatus comprises three parallel flange brackets and two groups of pull rods, and each group comprises four pull rods. The flange brackets are connected and fixed by four isometric pull rods. A jack is fixed in the middle of the flange brackets to pass axial force, and make the whole apparatus in a bearing self-balance state. The central part of the component post is connected to an MTS actuator through an adjustable connector adapter board. The apparatus has the advantages that: spherical hinge is used to easily fix a test piece and reduces the adverse impact caused by processing error, so as to avoid bias caused by conventional flat panel hinge. The apparatus has the advantages of simple structure, easiness to operate, less test space occupation and low requirements on the test apparatus.

The invention belongs to the technical field of nuclear power energy, and particularly relates to a fast reactor body anti-seismic test modeling method considering a fluid-solid coupling effect. The method comprises the steps of by considering the fluid-solid coupling effect and adopting an effect control equation analysis method, performing calculation to obtain a general dynamic similarity relationship of a fluid-solid coupling model; by adopting an added mass determination method, according to a principle of meeting a dynamic similarity relationship of solid, obtaining added mass to correctthe overall mass of the model, and enabling a Froude number to strictly meet the similarity relationship; and by adopting a dimension analysis method, performing calculation to obtain a dynamic similarity relationship of fluid parameters. A magnesium alloy material is adopted; calcium chloride simulates liquid sodium; the Froude number is enabled to strictly meet the similarity relationship through a method for adding the added mass; a similarity ratio of acceleration is controlled to be 1; a set of reasonable and accurate similarity ratio is obtained; and the similarity ratio includes a similarity ratio of an inherent frequency, a stress and displacement of a structure, and a similarity ratio of parameters such as an inherent frequency, a wave height, a pressure and the like of liquid sloshing.

A measurement method for a granular compaction pile 10 using a crosshole seismic test. The measurement method includes forming first to fifth measurement holes around the granular compaction pile, injecting grouting material into the first to fifth measurement holes and inserting casings into the first to fifth measurement holes, respectively, and installing an oscillator and a detector of a crosshole seismic tester in the first to fifth holes and detecting a velocity of a shearing wave, thereby measuring a diameter of the granular compaction pile according to a construction depth thereof. The shape and the diameter of the granular compaction pile are easily checked without causing damage to the granular compaction pile.

The invention discloses a civil engineering structure anti-seismic test device with an adjustable vibration direction, which comprises a main body, can reasonably simulate the state during an earthquake so as to increase the accuracy of a model during detection, and is characterized in that a rotatable rotating ring is arranged in a mounting seat, so that the seismic wave of the model in the transverse direction can be effectively adjusted; and the model can receive the impact of transverse seismic waves in different directions, so that the detection work is well completed, an arc-shaped beating block continuously beats a T-shaped connecting block in the current direction, or T-shaped connecting blocks in different directions are continuously beaten through a stepping motor, so that the obliquely upward seismic waves are well simulated, and meanwhile, a transfer box is arranged on the second piston cylinder, and a water pump in the transfer box can pump out or increase water in the first piston cylinder, so that the initial positions of the first piston block and the ejector rod can be adjusted, and seismic wave simulation of different degrees is realized.

The invention provides a detector dynamic performance integrated testing and evaluating method. The detector dynamic performance integrated testing and evaluating method comprises steps of 1, performing the reception linear test and the ground noise test; 2, performing the pulse signal test and the weak signal reception ability test; 3, performing the anti-interference capability test and the actual seismic signal reception capability test; 4, performing the field test to verify the reception performance of the detector by comparing actual seismic tests; and 5, performing the integrated performance evaluation of the detector. The detector dynamic performance integrated testing and evaluating method is closely integrated with the actual data, and the effect is more obvious. It is an effective method to preferably select the detector according to the seismic exploration demand.

The invention provides a tunnel anti-seismic test system and method for simulating fault zone crossing. The tunnel anti-seismic test system comprises a fault and tunnel simulation unit, a vibration unit, a lifting unit and a measurement and acquisition unit; the fault and tunnel simulation unit comprises a first surrounding rock model, a tunnel model and a second surrounding rock model which are connected in sequence; the vibration unit is connected with the bottom of the first surrounding rock model and is used for driving the first surrounding rock model to vibrate so as to simulate stratum vibration; the lifting unit is connected with the bottom of the second surrounding rock model and is used for driving the second surrounding rock model to do constant-speed lifting motion to realize simulation of stratum dislocation or wriggling; the measurement acquisition unit comprises a detection sensor; the detection sensor is mounted on one side of the tunnel model and is used for acquiring strain and vibration data of the tunnel model; and the tunnel mechanical behaviors during earthquake, fault movement and coupling of the earthquake and the fault movement can be studied, and the earthquake and fault movement and the structural failure mechanism are fully revealed.

The invention relates to a quasi-static anti-seismic test loading device with capacity of vertical uniform loading. The device comprises a vertical actuator, a distribution beam connected with the vertical actuator, a horizontal transverse actuator, a connecting beam connected with the horizontal transverse actuator, a loading beam fixing plate, a plurality of screws penetrating the connecting beam and the loading beam fixing plate simultaneously, a rolling bar rail beam with one end fixed to the upper part of the connecting beam and a plurality of rolling bar assemblies, wherein each rollingbar assembly comprises a fixed frame and a plurality of rolling bars which are mounted in the fixed frame and roll in the same direction at constant intervals; steel rails and limiting plates are arranged on two sides of the top surface of the rolling bar rail beam, and anti-separating plates are arranged on two sides of the bottom surface. During operation, the bottom surface of the rolling bar rail beam is placed on the top surface of a loading beam, two side surfaces of the loading beam are located between the anti-separating plates, the plurality of rolling bar assemblies are placed alongthe steel rails and located between the limiting plates, the bottom surface of the distribution beam is pressed on all the rolling bars, and two end surfaces of the loading beam are pressed and fixedby the connecting beam and the loading beam fixing plate through screws. Vertical uniform loading is achieved by the device.

The invention relates to a pseudo-static anti-seismic test device and method for a long tunnel structure. The pseudo-static anti-seismic test device comprises a counter-force structure, a loading structure and a cubic rigid model box, the counter-force structure comprises a counter-force pedestal and a counter-force wall, and the counter-force wall is of an L-shaped structure and is annularly arranged around the counter-force pedestal; a cubic rigid model box is placed on the surface of the counter-force pedestal, and a surrounding rock similar material for test simulation and a long tunnel structure model are placed in the cubic rigid model box; the loading structure comprises four hydraulic actuators which are vertically arranged, the upper actuator is connected with the second layer of the model box, the lower actuator is connected with the first layer of the model box, and the inertia force distribution mode of the structure is simulated through different applied forces during loading; according to the invention, the size effect influence caused by a vibration table reduced scale model can be reduced, large-scale tunnel structure model test analysis is realized, the earthquake action is simulated through force-displacement hybrid control, and the earthquake dynamic response of a long and large tunnel is better simulated.

The invention discloses a loading device and a loading-device-based seismic test system for a beam-column joint. The loading device comprises an X-shaped base, four reaction frame square steel tube columns, four first reaction frame beams, four second reaction frame beams, four third reaction frame beams, four first reaction frame short oblique beams, four second reaction frame short oblique beams and two first steel beams. The seismic test system for the beam-column joint of a space frame comprises a first jack, four second jacks and the self-balancing reaction frame loading device. According to the device and the system, a seismic test in the beam-column joint of the space frame can be implemented.

The invention relates to a test device and a test method for measuring self-loosening of bolts, and belongs to the technical field of anti-seismic test devices of nuclear power equipment. The test device comprises an outer frame, a first clamping plate, a second clamping plate, a pressure sensor, a horizontal spring and a vertical spring, wherein the first clamping plate, the second clamping plateand the connected spring are combined into a flexible clamp; and the device is used in cooperation with a seismic test table, thereby solving the problem that an existing test device cannot realize continuous change or simultaneous multi-directional loading of the loading amplitude and frequency of a seismic load. The bolts are mounted through the flexible clamp, the clamp is designed according to different response amplification requirements, the acceleration amplification effects of different positions on the nuclear power equipment can be simulated, and then loosening conditions of the bolts at the different positions on the nuclear power equipment can be tested. The device and the method can be used for carrying out bolt connection testing under the seismic load of the nuclear power equipment, and has great significance for optimization and loosening prevention design of the bolts of the nuclear power equipment.

The invention discloses a device and method for detecting the anti-seismic performance of an anti-seismic support hanger. The device comprises a box body, a supporting assembly, a vertical testing assembly and a transverse testing assembly, the outer side wall of the box body is provided with a side groove, and the inner side wall of the side groove supports the hanger through the arranged supporting assembly. The transverse testing assembly and the vertical testing assembly are arranged in the side groove, so that the support hanger is subjected to an anti-seismic test; According to the invention, a support plate can be conveniently dismounted from and mounted on the inner side wall of the side groove, the support plate can be suitable for various different anti-seismic supports and hangers through a plurality of vertical holes formed in the upper surface of the support plate, and vertical and transverse three-dimensional anti-seismic detection operation can be carried out on the anti-seismic supports and hangers; and the device is suitable for carrying out anti-seismic detection operation on anti-seismic supports and hangers of various different sizes by replacing the vertical supports and the transverse supports of various different sizes, and is suitable for being widely popularized and used.

The invention discloses a method and a device for determining the position of a potential fracture surface of a two-stage reinforced soil structure. The method comprises the following steps: carryingout model design of actual engineering of a two-stage reinforced soil structure through similarity comparison to obtain a test model; performing a reinforced soil structure anti-seismic test on the test model on a vibration table to obtain test data; analyzing and processing the test data, and determining the maximum strain point position of the test model; and deriving and determining the position of a potential fracture surface based on the maximum strain point position. According to the method and the device for determining the position of a potential fracture surface of a two-stage reinforced soil structure, the position of a potential fracture surface of a two-stage reinforced soil structure can be determined, the blank of insufficient research on the position of the potential fracture surface of a two-stage reinforced soil retaining wall at present is filled, the influence of earthquake action is considered in the process, and the method and the device have better applicability.

The invention relates to a latticed anti-seismic power capacitor frame, fixing rack, tower and device. The frame comprises a first capacitor frame and a second capacitor frame, each of which comprises a bottom frame, a power capacitor bank and two side frames, and the power capacitor bank is arranged at the upper end of the bottom frame; a silicon rubber plate is arranged between the power capacitor bank and the bottom frame; the two side frames are fixedly arranged on two sides of the power capacitor bank, and the bottoms of the two side frames are fixedly connected with the bottom frame; a first fixed steel frame is separately arranged on the front side and the rear side of the upper end of the power capacitor bank, and two ends of the two first fixed steel frame are fixedly connected with the upper ends of the two side frames by T-shaped plates; and two ends of second fixed steel frame are fixedly connected with the upper ends of the two side frames respectively. The frame is stable in structure and strong in anti-seismic capability, can pass 9-degree anti-seismic test verification, and is high in safety, simple in structure, small in floor area, small in workload of site installation and maintenance and low in cost.