23 results about "Hypergravity" patented technology

The invention relates to the technical field of wave simulation generation, in particular to a high-gravity field wave simulation method. The high-gravity field wave simulation method comprises the following steps: in a high-gravity field, performing similarity rate verification on a high-gravity field wave making similarity relationship between a predetermined wave height and a frequency dimensionless quantity; under the condition that the similarity rate verification is consistent, calibrating parameters of the super-gravity field wave making similarity relationship; and according to the super-gravity field wave making similarity relationship of the calibration parameters, performing super-gravity field wave simulation. According to the invention, waves in different environments in a super-gravity field can be accurately simulated, a transfer function can be accurately constructed, and the influence of physical quantities such as different motion amplitudes, different frequencies and different gravitational accelerations on wave making can be accurately evaluated.

The application discloses a multi-degree-of-freedom decoupling component for wind wave flow simulation under a supergravity field and a use method thereof. The component comprises a decoupling component, a dynamic loading device and a model. The decoupling component has six degrees of freedom. The decoupling component comprises an adapter ball, a transmission rod, a sliding bearing shaft and a fixer. The fixer is fixedly connected with the model. The fixer is installed at both ends of the sliding bearing shaft. One end of the transmission rod is also installed on the sliding bearing shaft. The other end of the transmission rod is sequentially connected with the adapter ball and the dynamic loading device. The decoupling component can decouple the six degrees of freedom and has high sensitivity. The model can freely deform in the soil under the premise that no additional constraint is added in the supergravity field. The decoupling component has simple structure and small space occupation, is more suitable for use in the limited space of the model box and can simulate the simultaneous action of three different types of loads, i.e. sea wind, sea wave and sea current under the supergravity field.

The present invention proposes a hypergravity environment simulator using a lifting device and a test method thereof, belonging to the technical field of scaled model testing of submerged vehicles. The invention solves the problems of centrifugal technology's difficulty in simulating complex three-dimensional flows, restrictions on the size and shape of test pieces, and the introduction of additional rotational torque during hypergravity scaled model testing. The invention comprises a launch device, a vehicle, and a test device. The test device comprises a small-scale test device or a large-scale test device. The vehicle is disposed in a launch area. The small-scale test device achieves the lifting and lowering of a water tank by a linear motor and control system disposed in a slide elevator. The large-scale lifting device achieves the lifting and lowering of a water tank by a driving device disposed in a towing device, driving a lifting bracket. The invention is mainly used to simulate a hypergravity environment.

The invention discloses a subsea tunnel surrounding rock full life cycle test method based on a supergravity geotechnical centrifuge technology, which comprises the following steps: firstly, constructing a model box, carrying out scale simulation on a subsea tunnel and a surrounding rock structure thereof, then putting the model box into a vacuum box for saturation treatment, finally taking the model box out of the vacuum box, putting the model box into a supergravity geotechnical centrifuge, and testing the whole life cycle of the subsea tunnel surrounding rock. And the super-gravity geotechnical centrifuge is started to rotate, and the strain sensor collects the dependent variable of the rock stratum near the tunnel reduced-scale pipeline in real time, so that the nonlinear elastic deformation of the rock stratum in the full life cycle in the running process of the train track simulation mechanism is observed. The model box is constructed to simulate the subsea tunnel and the surrounding rock structure thereof, test analysis is performed based on the supergravity geotechnical centrifugal technology, the evolution process of damage of the subsea tunnel and the surrounding rock structure thereof is remarkably accelerated, the experimental period is shortened, and the change condition of the whole life cycle is rapidly tested and determined.

The invention discloses a high-viscosity material experimental molding and rheological parameter measurement method considering both a supergravity environment and a constant gravity environment. Comprising the following steps: firstly, placing a high-viscosity material in a closed space provided with a sonar sensor, and enabling the closed space to be in a constant-gravity or supergravity environment; pressurizing the closed space to a preset high air pressure for a period of time, then releasing the pressure to a preset low air pressure for a period of time, repeating pressurizing and pressure releasing for preset times, and collecting the volumetric strain of the high-viscosity material at any preset high air pressure or preset low air pressure through a sonar sensor in the repeating process; and after the operation is repeated for preset times, bubbles in the high-viscosity material reach the preset discharge efficiency, and in-situ leveling and molding of the high-viscosity material are completed. The device and the method have the beneficial effects that the material bubbles of the high-viscosity material are efficiently discharged and the rheological parameters of the high-viscosity material are measured in a constant-gravity and supergravity experimental environment.

The application discloses a kind of wave-current coupling scour simulation test methods in supergravity field, it is related to the cross field of geotechnical engineering and ocean engineering.This method synchronously collects multi-source observation signals under supergravity environment, constructs phase synchronous observation sequence with wave phase as index.Using low-dimensional filtering-inversion integrated method based on wave phase harmonic expansion, combined with adaptive basis function and scour starting physical constraint, high-precision inversion bed surface shear stress field.Through calculating the sensitivity of shear stress to wave-current phase difference and constructing nonlinear controllable domain, carry out shear stress controllability analysis.Based on this, adopt double-layer control strategy, outer layer planning target phase trajectory, inner layer combined with bed surface evolution state switch linear or nonlinear compensation control structure, generate control command of driving wave-making and flow-making mechanism.The application solves the problem that existing technology cannot simulate the dynamic change of wave-current phase and lacks real-time feedback of shear stress field, realizes the accurate closed-loop simulation of wave-current coupling scour.

The invention relates to the field of aerospace biology and cell biology, in particular to an in-vitro preparation method of myocardial cells under a supergravity condition. Comprising the following steps: step 1, performing adherent culture on myocardial cells on a two-dimensional matrix; 2, mixing the myocardial cells subjected to two-dimensional culture in the step 1 with matrigel to form a three-dimensional culture system; step 3, placing the three-dimensional culture system obtained in the step 2 in a supergravity environment for culture; wherein the gravity intensity of the supergravity environment is 3G, and the treatment time is 12-96 hours. The invention provides a complete and repeatable myocardial cell in-vitro preparation method under the supergravity condition for the first time. A stable 3G supergravity environment can be provided, the damage of high shear force to cells is effectively reduced, the core pain point that a traditional supergravity experiment depends on expensive and rare parabola flight or a large centrifugal machine is solved, and the research cost and the technical threshold are greatly reduced.

This hypergravity facility is a hypergravity installation on Earth for generating artificial gravity that is stronger than Earth's gravity, and comprises a rotary body that rotates about a vertical axis of rotation, wherein artificial gravity is generated on a floor surface on the inside of the rotary body as the combined force of Earth's gravity and the centrifugal force due to the rotation of the rotary body. In a cross-sectional view orthogonal to the axis of rotation, the floor surface extends along a circle centered on the axis of rotation, and in a cross-sectional view that includes the axis of rotation, the floor surface is curved in an outwardly bulging manner.

The invention relates to the technical field of explosion mechanics, fluid dynamics, multiphase flow, ocean engineering and experimental mechanics, in particular to a coupling test method and system for a wave load and an explosion physical field under a high gravity field. According to the time difference between wave movement and detonation, the wave stabilization time and the wave period, the phase where explosion is located is adjusted; wave parameter data and explosion load data in the coupling test are collected. The device can be used for expanding and researching other high-speed fluid dynamics problems, experimental simulation and observation of the full-physical process of underwater explosion under the combined action of a super-gravity field and a wave load are achieved, and an underwater explosion scene in a sea wave environment can be simulated more truly.

The invention discloses a time-space sequence modularization supergravity test method for simulating a nuclide ten-thousand-year migration process in a geological barrier and application of the time-space sequence modularization supergravity test method. A kilometer-level geological barrier is spatially dispersed into representative space-time sequence geological modules such as a deep part-near part, a middle part, a shallow part-far part and the like along a nuclide migration path so as to realize reconstruction of a ten-thousand-year full-cycle migration process. A differentiated entity fracture model is constructed through 3D printing for different modules, and differentiated stress and hydraulic boundary conditions matched with the geological depth are applied under a high gravity field. The test adopts stable replacement nuclide, and through a concentration correction method based on transmission lag and a radioactive decay law, outlet concentration data of an upper-level module is converted into an inlet concentration boundary of a lower-level module, so that continuous tests of different space-time sequence geological modules are realized. And finally, restoring a time scale and splicing data by using a supergravity physical simulation similarity law, and reconstructing a full-path concentration penetration curve of the nuclide under a ten-thousand-year scale.

Payload systems for processing chemical substances under various gravity levels, such as hypergravity and / or microgravity. The payload systems may include a hypergravity thermal payload system configured to enable melt or cooling of a sample under hypergravity. Alternatively, or in addition, the payload systems may include a gravity-independent thermal payload system for enabling melt or cooling of a sample under various gravity levels, such as microgravity. Alternatively, or in addition, the payload systems may include a hypergravity crystallization payload system configured to enable crystallization of a chemical substance under hypergravity. Alternatively, or in addition, the payload systems may include a gravity-independent crystallization system configured to enable crystallization of a chemical substance in various gravity levels, such as microgravity.

The utility model relates to a supergravity equipment dynamic disc and static disc structure without residual accumulated liquid, which comprises a rotating shaft, a dynamic disc, a static disc, dynamic rings and static rings, the dynamic disc is arranged on the rotating shaft and is opposite to the static disc, a plurality of dynamic rings with different diameters are sequentially arranged on the dynamic disc, a plurality of static rings are arranged on the static disc and are obliquely arranged on the rotating shaft relative to the dynamic rings, and the static rings are arranged on the rotating shaft. And a plurality of liquid drainage holes are formed in the movable disc and are adjacent to the movable ring.

This invention relates to a simulation and testing system for narrow foundation pit excavation in a hypergravity field, comprising a foundation pit model system, a foundation pit support system, and a measurement system. The foundation pit model system includes a model box, a partition, and an adjusting rod. The partition is vertically positioned inside the model box. One end of the adjusting rod is connected to the partition, and the other end rests against the inner wall of the model box. The adjusting rod is used to adjust the position of the partition. The space between the partition and the model box is used to place test soil, which is formed by consolidating mud in a hypergravity field. The foundation pit support system includes two retaining walls arranged parallel to the excavation trench and a support rod connecting the two retaining walls. The support rod is used to adjust the distance between the two retaining walls. The measurement system is used to measure the strain of the retaining walls, ground settlement, and displacement field changes. This invention can comprehensively measure all aspects of the impact of foundation pit excavation in a hypergravity field and simulate the full excavation and addition of supports to the foundation pit.

The invention discloses a wave-current coupling scouring simulation test method in a high gravity field, and relates to the crossing field of geotechnical engineering and ocean engineering. According to the method, multi-source observation signals are synchronously collected in a supergravity environment, and a phase synchronous observation sequence with a wave phase as an index is constructed. A low-dimensional filtering-inversion integrated method based on wave phase harmonic unwrapping is utilized, and a bed surface shear stress field is inverted with high precision in combination with an adaptive basis function and scouring starting physical constraint. And carrying out shear stress controllability analysis by calculating the sensitivity of the shear stress to the wave current phase difference and constructing a nonlinear controllable domain. Based on this, a double-layer control strategy is adopted, an outer layer plans a target phase trajectory, an inner layer is combined with a bed surface evolution state to switch a linear or nonlinear compensation control structure, and a control instruction for driving a wave generation and current generation mechanism is generated. According to the invention, the problems that the dynamic change of the wave flow phase cannot be simulated and the real-time feedback of the shear stress field is lacked in the prior art are solved, and the precise closed-loop simulation of the wave flow coupling scouring is realized.

The invention discloses a tunnel boring machine hob service life prediction method suitable for a supergravity environment, and the method comprises the steps: firstly constructing a supergravity centrifugal experiment platform which comprises a supergravity rock-soil centrifugal machine and a model box disposed in a hanging basket of the supergravity rock-soil centrifugal machine, and the model box is internally provided with a rock-soil geological layer, a hydraulic servo system and a hob model; the hydraulic servo system is arranged in a rock-soil geological layer, the hob model is connected to the front end of the hydraulic servo system, and a data acquisition module in wireless communication connection with an external controller is arranged on the hob model; then, a hob service life prediction model is constructed, the hob service life prediction model comprises a wear prediction module and a service life prediction module, the wear prediction module is used for predicting the hob wear amount at the current moment, and the service life prediction module is used for predicting the hob remaining service life at the current moment. According to the hob service life prediction model constructed by the invention, coupling of the wear life and the fatigue life is carried out, the comprehensive damage of the hob is quantified, and the prediction precision and applicability are improved.

The invention discloses a subsea tunnel full life cycle supergravity simulation method, which comprises the following steps: firstly, constructing a supergravity test physical model, calibrating a phase field function, and simultaneously constructing a two-phase flow model of a subsea tunnel in a supergravity environment based on a continuity equation, a momentum conservation equation and a phase field equation; and then initializing a two-phase flow model based on the calibrated phase-field function, performing loop iteration of the two-phase flow model, completing change updating of the full life cycle of the subsea tunnel in the supergravity environment, and realizing iterative simulation of the full life cycle change condition of the tunnel in the constant gravity environment. According to the method, the landslide process is reproduced through physical simulation in the supergravity environment, structural response is analyzed by means of calculation of a numerical model, and the landslide action mechanism and the tunnel failure mode are further systematically revealed.

A reverse cross-flow supergravity device with an air-blocking ring wall comprises a shell, a bearing seat, a rotating shaft, a rotating bed unit and a liquid conduit. The rotating bed unit comprises a base plate, a perforated top plate, a filling layer and an air-blocking ring wall. The base plate is connected to the rotating shaft. The perforated top plate allows fluid to pass through and is connected to the shell through a first dynamic seal. The filling layer has a bottom surface, a top surface and an outer peripheral surface. The air-blocking ring wall surrounds a portion of the outer peripheral surface adjacent to the outer peripheral edge of the top surface and is spaced apart from the base plate to block gas from penetrating the portion of the outer peripheral surface. The reverse cross-flow supergravity device with an air-blocking ring wall of the present invention can additionally produce the functions and effects of a cross-flow supergravity device in a counter-flow supergravity device, and can retain the advantages of a counter-flow supergravity device.

This invention provides a signal correction method and system for a strain gauge earth pressure sensor under centrifugal conditions with hypergravity. The method acquires the original signal from the earth pressure sensor, piezoelectric vibration signals from the bottom of the basket and the top of the model box, and a strain gauge resultant force signal coplanar with the earth pressure sensor. The vibration signals are then subjected to FFT transformation and frequency domain difference to obtain the vibration frequency domain of the earth pressure sensor plane, and filtered. The actual hypergravity is decoupled by subtracting the bottom surface vibration signal from the strain gauge resultant force signal, and then converted back to the actual hypergravity at the sensor location. Pre-calibrated centrifugal acceleration-zero drift and centrifugal acceleration-sensitivity relationships are used for dual compensation, and the corrected pressure data is output. This invention systematically eliminates zero-point drift, sensitivity changes, and vibration interference caused by hypergravity, significantly improving measurement accuracy.

This invention discloses an experimental apparatus and method for simulating reverse fault dislocations in a hypergravity centrifuge. The apparatus comprises a hypergravity loading system, a reverse fault dislocation chamber, and a fault dislocation loading system. The hypergravity loading system consists of a centrifuge body, a suspended platform, and counterweights. The reverse fault dislocation chamber includes an external rigid chamber with an observation window, a rigid base, and an internal movable chamber. The fault dislocation loading system includes a loading servo cylinder, a vertical connecting device, and a sliding drive device. This invention applies vertical loads controlled by the loading servo cylinder, and through the coordinated design of the vertical connecting device and the sliding drive device, drives the internal movable chamber along a fault dip angle of 50°–70° to achieve precise dislocation, thus completely reproducing the entire movement process of the reverse fault during an earthquake.

The invention relates to the technical field of landfill safety monitoring, and particularly discloses an early warning method and system for determining a high-pressure triggering instability threshold value through a supergravity test. And obtaining a model configuration parameter set containing a centrifugal scale proportion and a material ratio, and constructing a physical model in the centrifugal machine to restore the prototype high stress field. Then, under the supergravity environment, instability is induced through bottom gas injection, pressure and displacement data of the whole process are synchronously collected in a high-frequency mode to determine a critical air pressure ratio threshold value, finally, risk comparison judgment is conducted on the critical air pressure ratio threshold value and the air pressure ratio obtained through field real-time monitoring, and therefore accurate early warning of the instability risk is achieved.

The application discloses a kind of multi-class diapir structure supergravity physical simulation experimental device and experimental method.Test area bottom plate and base plate are connected by base, test area shell is set on test area bottom plate, diapir core material injection system is installed on base plate, test area shell is the frame surrounded by side wall board and curved surface table, removable rigid partition can divide into three sub-test areas, the bottom of each sub-test area has a material injection port, each corresponds a set of independent material injection system, movable piston is arranged in material injection system, drive system can control the injection rate of material, method includes selecting simulation material, injecting simulation material into material cavity, setting test model in test area, monitoring the deformation of test model to simulate geological structure deformation process.The application can carry out simulation research on single diapir structure and diapir group structure, test the repeatability of diapir structure supergravity simulation test results, and can significantly reduce experimental error.

The application discloses a kind of underwater simulation hypergravity / weightlessness environment test device and test method, comprising: cabin mechanism, liquid supply mechanism, gas supply mechanism, large water tank and position detector;The position detector is used to detect the position of cabin mechanism in large water tank and send position information to control system;The control system is used to control the gas supply mechanism to inject or discharge compressed gas to change the volume of cabin mechanism according to the position information provided by position detector;And / or control the liquid supply mechanism to inject or discharge liquid to change the weight of cabin mechanism, the weight of cabin mechanism is changed by liquid supply mechanism, so that cabin mechanism sinks downward, with acceleration upward, so that the whole main cabin is in hypergravity state;The volume of cabin mechanism is changed by gas supply mechanism, so that the buoyancy of cabin mechanism is upward, with acceleration upward, so that the whole main cabin is in weightlessness state.

To provide a hypergravity facility capable of easily securing freedom of movement of users under hypergravity.SOLUTION: There is provided a hypergravity facility 1 for generating on the earth, artificial gravity F that is greater than the earth's gravity. The hypergravity facility includes a rotating body 5 for rotating around a vertical rotation axis A, and generates the artificial gravity F on a floor surface 10 inside the rotating body 5 as resultant force of the earth's gravity F1 and centrifugal force F2 generated by the rotation of the rotating body 5, where the floor surface 10 extends along a circle centered on the rotation axis A in a cross-sectional view orthogonal to the rotation axis A, and the floor surface 10 forms a curved line bulging outward in a cross-sectional view including the rotation axis A.SELECTED DRAWING: Figure 2