2861 results about "Model test" patented technology

The invention discloses a multifunctional geotechnical model test chamber device adopting photogrammetric technology. The multifunctional geotechnical model test chamber device comprises a model test chamber body, a loading and testing part, a movable pile baffle, a downward-moving control part, a displacement testing system and the like. The whole-filed displacement is measured by using the photogrammetric technology. The soil arch effect demonstration of 20 different pile spacing ratios, the pile-supported embankment filler particle soil arch effect and a compound foundation cushion layer effect simulation test under the rigid foundation can be realized. Meanwhile, the geotechnical model test chamber device can also carry out simulation such as stress and deformation simulation of buried pipes, slope deformation, excavation of foundation pits, stress and deformation of an enclosing structure and the like by using the test chamber.

The invention discloses a network bandwidth self-adaptive QOS (quality of service) transmission method and system and a terminal device. The network bandwidth self-adaptive QOS transmission method comprises the following steps of: presetting first network state information and a code stream grade in a streaming media session process; obtaining second network state information in real time by utilizing a network period feedback protocol; and comparing the second network state information with the first network state information to determine whether the current network is jammed, if so, down-regulating the code stream grade or sending speed, and if not, keeping or up-regulating the code stream grade or the speed to realize dynamic regulation to real-time communication flows of mobile streaming media. According to the network bandwidth self-adaptive QOS transmission method and system and the terminal device disclosed by the invention, the size of code stream and the sending speed of a streaming media business source can be automatically regulated according to fluctuation of mobile internet bandwidth through a large-scale data acquisition and model test to ensure the stability of real-time transmission of streaming media audio-video data in a mobile internet environment, therefore, different network conditions can be adapted, and user experience can be enhanced.

The invention relates to a testing platform with ground and slope engineering module. Long edge at one side of the main structure side steel plate has an instrument burying hole and data leading out hole, the other side having viewing window, bottom of the rectangular structural module slot rubble and sand cushion having water pipe supply net that connects with the water tank and vacuum extraction device, one side of the short edge of the main body structural side steel plate having discharge hole, two sides of the main structural beam post overpass the latched the reverse beam, whose lower end having hydraulic jack, ball hinges and bearing plate formed servo bearing system, displacement sensor, sand pressure sensor and gap water pressure connected to form the monitoring system. It can be deployed to prevent disasters.

The invention provides a joint test specimen method using 3D (three-dimensional) printing for making a structure surface containing specific geometrical characteristics, and belongs to a specimen making method of model test specimens similar to joint rock bodies. According to the method, the structure surface is independently designed according to study requirements, or the actual rock body structure surface appearance is obtained through a surface outline scanning technology; the designed structure surface penetrates through a complete cylinder model in 3D graphics software, two parts of complementary test block models obtained through separation are obtained through Boolean operation, and a 3D printer is used for respectively printing and forming the two parts of test block models; printing molds are respectively put into two specimen making boxes and are assembled, similar materials are cast into the specimen making boxes, and the mold dismounting maintenance is carried out after the materials are solidified and formed; the two parts of test blocks are correctly combined to obtain the standard test specimens containing the designed structure surface. The method has the advantages that (1) the operation of the method is safe, simple and convenient; (2) the complicated and variable structure surface is embedded in the standard test specimens, the actual rock body structural surface can be reproduced through being matched with the surface outline scanning technology, and the reasonable test result is obtained.

A model testing method of deep rock burst includes carrying out true three shafts loading on rock burst simulation unit then applying unload at single surface, carrying out rock burst test on rock body when load is charged and discharged for realizing rock burst model test in laboratory.

The invention relates to a multifunctional model test system for tunnel and underground engineering. The test system comprises a rail, a model box, a servo-controlled test loading device, a rotating seat, rotating shafts and a bracket, wherein the rail is arranged on the upper part of the test system; the model box is arranged on the middle part of the test system and comprises an outer frame, an inner frame and an organic glass plate; the servo-controlled test loading device comprises a horizontal loading jack and a vertical loading jack; the rotating shafts are arranged on the two sides of the middle part of the test system; and the rotating seat is arranged on the back surface of the upper part of the test system and is connected with the bracket through a rotating loading cylinder. The system can perform a model test on a block system, rock tunnel excavation, a tunnel chamber, a tunnel group, a side slope, shield excavation and building traversing, has a facade rotating loading function, effectively solves the technical problem that a strain field is required to have a wide uniformity range and a high uniformity degree in the model test, and can well simulate the stress environment of tunnels existing in a rock-soil body.

The invention discloses a test device of a model for manufacturing rock masses containing interlayers and a test method thereof. The test device of the model for manufacturing the rock masses containing interlayers comprises a semicircular angle device, an upper baffle, a lower baffle, a left side plate, a right side plate, a circular turntable, a core-drilling machine drill bit, a flat plate, a flat plate angle control rod, a fixed screw rod, a base plate, an interlayer model test piece, a U-shaped plate and a guide slot. The test method comprises the following test steps: arranging the rock masses according to an outline central line and fixing the rock masses; manufacturing interlayer materials and casting the model, fastening the test piece, drilling the core, replacing the core-drilling machine drill bit, changing the position of the test piece to drill repeatedly and cutting to obtain the test pieces with different height-diameter ratios or obtain the test pieces with different interlayer inclination angles; then carrying out mechanical test. The test device is simple in structure and suitable for manufacturing the test pieces with different interlayer thicknesses, inclination angles and height-diameter ratios; according to a core-drilling and cutting machining device, by making full use of the existing device, the influence on the mechanical properties of the test pieces caused by different conditions can be analyzed, coring of irregular rock samples taken in the site can be carried out directly, so that the test efficiency is improved and the test time is shortened.

The invention relates to the technical field of hydromechanics model tests, and provides a particle picture speed measuring technique which is efficient, reliable and strict and synchronous in measurement of different sections. According to a lamination synchronous three-dimensional particle picture speed measuring method, incident multi-color lasers are dispersed to light sources of different colors by a triple prism light splitting device, and meanwhile the light sources illuminate to a testing area; an illuminated particle picture presents different color characteristics in different sections; a set of charge coupled device (CCD) video cameras are arranged near the testing area, an optical filter in a certain color is added to the front of a lens of each video camera, the colors of the optical filters are matched with those of the light sources, so that the video camera can only shoot the section with the corresponding color; and all the video cameras work simultaneously, particle pictures on different sections are obtained simultaneously, two-dimensional particle picture analysis is conducted on each section, relative analysis is conducted on pictures among different sections, and three-dimensional flow field information is obtained. The method is mainly applied to testing and measuring of hydromechanics models.

The invention discloses a system for kinetic model test of the ballastless track subgrade of a high-speed railway. The system comprises a model test box, a model of the ballastless track subgrade of the high-speed railway, an excitation system and a monitoring system, wherein the model of the ballastless track subgrade of the high-speed railway is formed by the foundation, a foundation bed bottom layer, a foundation bed surface layer, a concrete base, CA (cement asphalt) mortar, a track plate, a fastener system and a steel rail in sequence; the excitation system comprises a series of vibration exciters; simulation of train loads at different running speeds is realized by cooperatively controlling the vibration excitation frequency and phase of each vibration exciter; and dynamic earth pressure sensors and layered settlement gauges are arranged in the model of the subgrade, steel strain gauges are embedded in the concrete base and displacement and acceleration sensors are arranged on the track structure to jointly form the monitoring system of the system. The system can be used for carrying out study on the kinetic model test of the subgrade under the running load of the train and can evaluate and predict different foundation conditions, subgrade structures and track irregularity.

The invention discloses a test method and a test device for simulating stratum deformation caused by pipe jacking construction. The test method comprises the following steps: (1) installing a lateral flexible loading bag; (2) filling with earth; (3) installing a simulated jacking pipe; (4) installing a loading system; (5) loading; (6) monitoring an initial value; (7) simulating an excavated stratum loss process; and (8) organizing and analyzing test data. The lateral flexible loading bag is adhered to the inner wall of a model box, the left end of the model box is connected with the lateral flexible loading bag, the right end of the model box is connected with a lateral loading pressure gauge, and the lateral loading pressure gauge is connected with a lateral loading booster pump through a lateral pressurizing water injection pipe; an exhaust valve is arranged at the top of the lateral flexible loading bag; a circular hole is formed from the front side wall of the model box to the bottom of the model box; studs are welded at the periphery of a circular jacking pipe preformed hole; the right end of the simulated jacking pipe is placed in the circular jacking pipe preformed hole in the front side wall of the model box, and the left end of the simulated jacking pipe is placed close to the rear wall of the model box. The test device disclosed by the invention is reasonable in structure and convenient to operate and is used for simulating a model test of stratum deformation caused by pipe jacking tunnel construction.

The present invention relates to a model test device, and specifically to a frozen soil mechanics model test device. The invention is characterized in that the frozen soil mechanics model test device has a full-steel box type structure which comprises a heat insulation box body, a baseboard temperature controller, a water supplying device, a loading device and a data collecting and processing device. The device adopts a welding mode for connecting to a whole, and only one side plate adopts bolt connection, wherein, the baseboard structure of heat insulation box body comprises a heat insulationbaseboard, a water supplying pool and a top plate of water supplying pool. The structure gives attention to the functions of water supplying and temperature control. The water supplying device comprises a water level controller, the water supplying pool and a water supplying pipeline device. The charging device comprises a hydraulic jack and a hydraulic oil pump. The data collecting and processing device comprises a DT500/600 series data collector, a XSL series temperature measuring instrument and various types of sensors. The device of the invention has the advantages of realizing unidirectional and bidirectional freezing condition, realizing the water supplying of water migration in freezing process, providing the load of model test load application damage, monitoring the temperature field and stress field of frozen soil, monitoring the frost heaving, subgrade settlement deformation, etc.; and realizing the automatic collection and analysis of test data in the test process.

The invention discloses a method of improving performance of a convolutional neural network based on a linear discriminant analysis criterion, which belongs to the field of deep learning convolutional neural networks, the field of brain cognition and the field of computer vision image classification. The method comprises the following steps: 1) to-be-processed image sets are divided into a training set, a verification set and a test set; 2) a convolutional neural network model is selected; 3) one layer in the convolutional neural network model in the second step is selected, regularization constraints based on the linear discriminant analysis criterion are carried out on features of the selected layer, and a new convolutional neural network model is formed; and 4) according to mini-batch-based stochastic gradient descent method, the training set is used for training the new convolutional neural network model, and after the new convolutional neural network model is well trained, the well-trained convolutional neural network model tests to-be-classified images, and classified prediction is completed. Experimental results show that the method of the invention can significantly improve the convolutional neural network image classification precision.

The present invention belongs to the field of tunnel and underground engineering technology. In the concrete, it relates to a shield tunnel settlement control method based on ground-detecting radar. Said control method includes the following steps: adopting ground-detecting radar equipment to make sectional and longitudinal detection of slurry injection after shield tunnel wall, determining and estimating dielectric constant of slurry injection material, making model testing detection to obtain data, extracting characteristic image and characteristic wave, utilizing wavelet neural network automatic identification method to obtain slurry injection layer distribution form, combining said slurry injection layer distribution form with ground settlement monitoring data and making analysis, then defining further construction measure for implementing settlement control according to the detected and analyzed result.

The invention relates to a multifunctional physical simulation test system for coal engineering. The system comprises a test chamber, a model forming subsystem, a hydraulic loading control subsystem, a test subsystem and a gas pumping and injecting subsystem, wherein the test chamber comprises a loading frame and a counterforce cover detachably connected to one end of the loading frame; the loading frame and the counterforce cover are coaxially mounted on a base; a guide rail is arranged on the base in an axial direction of the loading frame; and support seats capable of sliding along the guide rail are mounted on the guide rail and are mounted at bottoms of the loading frame and the counterforce cover respectively; a track conveying subsystem for conveying models is detachably connected between the model forming subsystem and the test chamber. The invention further provides a coal model test method. According to the multifunctional physical simulation test system for coal engineering and the coal model test method, operation such as drilling, joint forming, fracturing, coal and gas outburst, excavation and support of underground construction and the like under actions of crustal stress, gas pressure and comprehensive multiple factors can be simulated, and an experimental verification means is provided for coal and gas outburst related occurrence mechanism, prediction and control.

The invention discloses a foundation base model test device capable of bidirectional loading. A force-bearing framework is a rectangular steel frame, a model slot is of a rectangular steel structure, is provided with an upper opening and is formed by welding of a box template, the force-bearing framework is sleeved at the periphery of the model slot, a horizontal actuator counterforce column is vertically erected on the left end part of the model slot, the left end of the horizontal actuator is connected with the horizontal actuator counterforce column, the right end of the horizontal actuator is connected with the top of a pile, the upper end of a vertical actuator is connected with a cross beam at the upper part of the force-bearing framework, the lower end of the vertical actuator is connected with the top of the pile through a vertical dowel steel, a row of drain valves are arranged at the lower part of the left side wall of the model slot, an inlet valve is arranged at the lower part of the right side wall of the model slot, and a water supply pipe of the inlet valve is connected with a constant-pressure water tank. Monitoring is systematic and comprehensive, embedding of monitoring instruments is relatively easy, and automatic and real-time monitoring on multiple physical quantities can be realized. The foundation base model test device disclosed by the invention can be used in conducting model tests like slope foundation, composite foundation and pile foundation.

The invention provides a rotor wing dynamic test device which comprises a model rotor wing system, a pitching motion simulation mechanism, a rolling motion simulation mechanism, a course rotation simulation mechanism, an x-y-z axis horizontal moving device and a test accessory device. Seven independent control servo motors are used for the rotor wing dynamic test device and used for respectively driving longitudinal, lateral and transverse linear motions, pitching, rolling and course rotation motions and rotation of a model rotor wing. The seven servo motors are respectively provided with an independent control system, six-freedom-degree motion laws and the rotor wing rotating speed can be dynamically combined to be controlled under control of a central industrial personal computer, model test study on influences of dynamic maneuvering flight of helicopters on the aspects such as rotor wing pneumatic and flight mechanics and dynamics can be conducted, and motion combination tests among different degrees of freedom can be carried out according to needs.

The invention provides a method for correcting the influence of high-speed wind tunnel model afterbody distortion on lateral-directional aerodynamic characteristics. A test model contains a freely-replaceable real afterbody and a distortion afterbody model; the test model pre-deviates to a given sideslip angle through a sideslip angle-varying blade belly supporting device; a wind tunnel test is performed on the real afterbody model and the distortion afterbody model according to the same test conditions; interpolation is performed on lateral-directional aerodynamic coefficients according to the same angle of attack sequence; subtraction is performed on two kinds of interpolated lateral-directional aerodynamic coefficients, so that an obtained difference value of the two kinds of interpolated lateral-directional aerodynamic coefficients is the influence of the afterbody distortion on the aerodynamic characteristics of the test model. The method can be used for correcting the influence of the afterbody distortion on the lateral-directional aerodynamic characteristics of the model test under the given sideslip angle.

The invention discloses a pile foundation bearing characteristic model test device under a complicated load effect. The pile foundation bearing characteristic model test device comprises a model groove, a horizontal loading system, a vertical loading system and a measuring device. The model groove is made of an organic glass panel and is reinforced by channel steel. The horizontal loading system is composed of a pulley and a weight. The vertical loading system is composed of vertical channel steel, a counter-force beam, a lifting jack and a linear sliding guide rail. The measuring device comprises a minitype laser displacement sensor system which is used for measuring the horizontal displacement of a pile head and the sedimentation of a pile tip and can horizontally move along with the moving of the pile head. The measuring device further comprises a pull rope displacement sensor system which measures the horizontal displacement of a pile body. The invention further discloses the test method of the pile foundation bearing characteristic model test device. According to the pile foundation bearing characteristic model test device and method, loading is simple, the load direction is stable, the data of pile sedimentation, pile head horizontal displacement, pile body horizontal displacement and the like of a model can be accurately measured, the measured data is high in precision, and pile foundation bearing characteristic model test research under the complicated load effect can be conducted conveniently and effectively.

The invention discloses a tunnel construction large-scale integrated geophysics advanced detection model test device, which comprises tunnel surrounding rock, a main tunnel model, a model test case, a water-containing geological structure device, a numerical control automation construction device and a main control chamber. The model test device is a large-scale integral geophysics advanced detection model test device meeting the detection of a seismic wave method, an electromagnetic method and a direct current power method, the geophysics advanced detection model test device can be utilized for studying the geophysics response characteristics of the water-containing geological structure device in front of a tunnel face, in addition, various geophysics advanced detection forward and inversion methods of the water-containing geological structure device are verified, the relationship between some geophysics detection method results and the water inflow is studied, and the test foundation is laid for the water inflow prediction and the advanced prediction of the water-containing geological construction device in actual engineering.

The invention discloses a device for a landslide model test. The device comprises a landslide model, a model box, a rainfall system, a water supply system, a water recovery system, a reservoir water level rising and falling system, a landslide model external data acquisition device and a landslide model internal data acquisition device, wherein the rainfall system, the water supply system, the reservoir water level rising and falling system, the landslide model external data acquisition device and the landslide model internal data acquisition device are connected with an integrated control platform; the rainfall system is arranged above the model box; the water supply system is arranged above the rainfall system; the water recovery system is arranged under the model box; the water recovery system is connected with the water supply system through a water supply pipe; the reservoir water level rising and falling system is arranged on the lateral side of the model box and is communicated with the model box through a water supply and drainage hole with a filter net. The invention also provides a method for the landslide model test. The device can be used for simulating and realizing the water level change and rainfall intensity within a short period of time; the device can be comprehensively automatically controlled; the precision of the device for the landslide model test can be increased; the method is simple and can be used for increasing the efficiency of the landslide model test.

The invention relates to an ultra-large type geotechnical engineering three-dimensional model test system, which comprises an ultra-large type model test device, a hydraulic loading system and a stress displacement test system, wherein the hydraulic loading system and the stress displacement test system are connected with the ultra-large type model test device respectively; the ultra-large type model test device comprises a door-type frame; the lower end of the door-type frame is arranged on a bottom plate device; and a model reverse wall positioned on the lower part of the door-type frame is arranged on the bottom plate device. The ultra-large type geotechnical engineering three-dimensional model test system has the advantages that: 1) the ultra-large type geotechnical engineering three-dimensional model test system has compact integrated structure, high strength and large rigidity and can bear kiloton reverse force; 2) the ultra-large type geotechnical engineering three-dimensional model test system can satisfy the requests of the different height tests; 3) the bottom plate is assembled and provided with a T-shaped slide groove; and the reverse wall can be expanded front and back or left and right or fixedly shrunk so as to meet requirements on different model sizes; 4) the model test device is conveniently mounted and dismounted to finish different plane tests; 5) a stress displacement test system can automatically and highly-precision collect and analyze the test result, which is conveniently operated; and 6) the large three-dimensional model tests for crossed tunnels are accomplished.

The invention relates to a physical simulation test system for true triaxial rockburst of a deep-buried tunnel, and belongs to the technical field of rock engineering. The physical simulation test system for true triaxial rockburst comprises a true triaxial loading system consisting of a counterforce rack, a vertical loading system, a horizontal fore-and-after loading system and a horizontal left-and-right loading system, wherein the counterforce rack is formed by connecting and combining a steel beam frame, a front door and a back door through pulling rods; the vertical loading system is fixedly arranged at the top of the interior of the counterforce rack; the horizontal fore-and-after loading system is fixedly arranged on the inner wall of the back door; and the horizontal left-and-right loading system is fixedly arranged on the right side wall inside the counterforce rack. According to the physical simulation test system, independent large-tonnage loading in three directions can be provided to meet the loading requirement of a model test under deep-buried high stress condition, the surface of a test piece can be uniformly stressed, an excavation hole on the steel beam frame can be opened after loading so as to excavate the test piece, and blasting disturbance can be stimulated by vibration jacks in the three directions; and the physical simulation test system can be applied to physical simulation test research on rockburst of the deep-buried tunnel.

The invention provides a semi-submersible type platform dynamic positioning model testing propulsive device, which belongs to the field of sea engineering. The propulsive device comprises a full circle swinging realization mechanism and a main transmission mechanism, wherein shafting of the main transmission mechanism is arranged inside the full circle swinging realization mechanism; a first bearing and a second bearing are arranged on an inner spindle; a first straight gear is arranged on a stepper motor, and is engaged with a second straight gear; the second straight gear is arranged on the upper end of an outer spindle; the outer spindle is provided with a pod and a conduit, and is connected in an outer shaft housing through a first thrust bearing and a second thrust bearing; and a third bearing is arranged on the end of the pod close to the end of a propeller. The propulsive device simplifies the shafting by adopting the main transmission mechanism and the full circle swinging mechanism, reasonably utilizes space, and ensures flexibility of the device. On the basis of not affecting operation of the main transmission mechanism, the propulsive device can realize omnibearing turning and omnibearing propulsion in 360 degrees, and improve response speed of a dynamic positioning propulsive system.