Abstract: The present disclosure provides a supergravity simulation system for in-situ stress field and seepage field for deep earth engineering, comprising: a triaxial pressure chamber for placing a model and providing in-situ axial pressure, confining pressure and seepage field of deep earth structure; a simulation control device for providing pressure liquid and pore water to the triaxial pressure chamber to generate the aforementioned axial pressure, confining pressure and seepage field, and controlling the values of the axial pressure, confining pressure and seepage field; a signal acquisition device for monitoring the deformation and seepage process of the model during the test. The invention improves the similarity, reliability, and accuracy of the simulation test, and it can output pressure with an accuracy of 1% or constitute the pore water pressure difference with an accuracy of 1% to the triaxial pressure chamber through the command of the control unit.

Abstract: Provided is a three-directional motion decoupling periodic structure for a shaking table container. The periodic structure is formed by sequentially superimposing n periodic structure units, wherein each of the periodic structure units is formed by sequentially superimposing a first side-confining layer, a planar decoupling layer, a second side-confining layer and an elastic layer, wherein n is a positive integer greater than or equal to 2; the cross-sectional shapes of the first side-confining layer, the elastic layer, the second side-confining layer and the planar decoupling layer are the same; and the periodic structure is used for implementing three-directional motion decoupling in the operating condition of ground shaking. Further provided is a three-directional motion decoupling container for shaking table test, which is formed by combining the periodic structure, a container base plate and a position-limiting protection door-type frame (3).

Abstract: A pressure-control temperature-control hypergravity experimental device includes a high pressure reactor, a hydraulic oil station, a manifold board, a hypergravity water pressure control module, a hypergravity mining control module, a kettle body temperature control module, and a data collection box. The hydraulic oil station is connected to the manifold board and then two paths are formed. The two paths are respectively connected to the high pressure reactor via the hypergravity water pressure control module and the hypergravity mining control module. The kettle body temperature control module is connected to the high pressure reactor. The high pressure reactor, the manifold board, the data collection box, the hypergravity water pressure control module and the hypergravity mining control module are disposed on a hypergravity centrifuge air-conditioning chamber.

Abstract: A pressure-control temperature-control hypergravity experimental device includes a high pressure reactor, a hydraulic oil station, a manifold board, a hypergravity water pressure control module, a hypergravity mining control module, a kettle body temperature control module, and a data collection box. The hydraulic oil station is connected to the manifold board and then two paths are formed. The two paths are respectively connected to the high pressure reactor via the hypergravity water pressure control module and the hypergravity mining control module. The kettle body temperature control module is connected to the high pressure reactor. The high pressure reactor, the manifold board, the data collection box, the hypergravity water pressure control module and the hypergravity mining control module are disposed on a hypergravity centrifuge air-conditioning chamber.

Abstract: A synchronous modulation method based on an embedded player. The method comprises the steps of: Step S1, acquiring a current timestamp adopted by a current synchronous audio signal and a current synchronous video signal; Step S2, acquiring a jump difference value of the current timestamp; Step S3, determining whether the jump difference value is less than a first preset time, if yes, synchronously playing, by the player, the audio signal and the video signal through a first timestamp, and exiting; and Step S4, determining whether the jump difference value is greater than a second preset time, if yes, synchronously playing, by the player, the audio signal and the video signal through a second timestamp, and exiting.

Abstract: A synchronous modulation method based on an embedded player. The method comprises the steps of: Step S1, acquiring a current timestamp adopted by a current synchronous audio signal and a current synchronous video signal; Step S2, acquiring a jump difference value of the current timestamp; Step S3, determining whether the jump difference value is less than a first preset time, if yes, synchronously playing, by the player, the audio signal and the video signal through a first timestamp, and exiting; and Step S4, determining whether the jump difference value is greater than a second preset time, if yes, synchronously playing, by the player, the audio signal and the video signal through a second timestamp, and exiting.

Abstract: Provided is a three-directional motion decoupling periodic structure for a shaking table container. The periodic structure is formed by sequentially superimposing n periodic structure units, wherein each of the periodic structure units is formed by sequentially superimposing a first side-confining layer, a planar decoupling layer, a second side-confining layer and an elastic layer, wherein n is a positive integer greater than or equal to 2; the cross-sectional shapes of the first side-confining layer, the elastic layer, the second side-confining layer and the planar decoupling layer are the same; and the periodic structure is used for implementing three-directional motion decoupling in the operating condition of ground shaking. Further provided is a three-directional motion decoupling container for shaking table test, which is formed by combining the periodic structure, a container base plate and a position-limiting protection door-type frame (3).

Abstract: The present invention discloses a simulated loading method and an apparatus for moving load of a whole train in rail transportation. Multiple actuators are arranged above rail sleepers along rail direction. The rail is cut into separate rail segments, which are connected to rail sleepers via fastening systems. Based on a verified train-rail-subgrade theory model, the distribution of fastener force under the movement of a train bogie can be obtained. A simplified expression of this solution can be acquired by Gauss function fitting considering the train axle load, which is used as the input load of actuators. Each actuator performs the same dynamic excitation sequentially with a time interval along the train moving direction. Therefore, moving load of different vehicle types at different train speeds can be simulated. The present invention provides a reliable and convenient test method and an apparatus for research of developing infrastructures of rail transportation.

Abstract: The present invention discloses a simulated loading method and an apparatus for moving load of a wheel axle in rail transportation. Multiple actuators are arranged right above rail sleepers along rail direction. The two continuous rails are connected to the rail sleepers via fastening systems and are cut into discrete independent rail segments right above the rail sleeper. The anti-drop member satisfies the applications of compression and uplift force of the actuator. The input load of each actuator is obtained from the load-time history of a single fastening system under moving load of a wheel axle according to a train-rail-subgrade theory model, and adjacent actuators perform dynamic excitation in turn with a same time interval to achieve simulation of moving load of a wheel axle under different speed. This invention provides a reliable and convenient loading platform for experimental study of the rail transportation.

Abstract: The present invention discloses a simulated loading method and an apparatus for moving load of a whole train in rail transportation. Multiple actuators are arranged above rail sleepers along rail direction. The rail is cut into separate rail segments, which are connected to rail sleepers via fastening systems. Based on a verified train-rail-subgrade theory model, the distribution of fastener force under the movement of a train bogie can be obtained. A simplified expression of this solution can be acquired by Gauss function fitting considering the train axle load, which is used as the input load of actuators. Each actuator performs the same dynamic excitation sequentially with a time interval along the train moving direction. Therefore, moving load of different vehicle types at different train speeds can be simulated. The present invention provides a reliable and convenient test method and an apparatus for research of developing infrastructures of rail transportation.

Abstract: The present invention discloses a simulated loading method and an apparatus for moving load of a wheel axle in rail transportation. Multiple actuators are arranged right above rail sleepers along rail direction. The two continuous rails are connected to the rail sleepers via fastening systems and are cut into discrete independent rail segments right above the rail sleeper. The anti-drop member satisfies the applications of compression and uplift force of the actuator. The input load of each actuator is obtained from the load-time history of a single fastening system under moving load of a wheel axle according to a train-rail-subgrade theory model, and adjacent actuators perform dynamic excitation in turn with a same time interval to achieve simulation of moving load of a wheel axle under different speed. This invention provides a reliable and convenient loading platform for experimental study of the rail transportation.