11 results about "Hypergravity" patented technology

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.

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.

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 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.

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.