3315results about "Hydrodynamic testing" patented technology

The invention provides an ocean intelligent forecasting large model construction method, and relates to the field of ocean forecasting, and the method specifically comprises the following steps: obtaining multi-source ocean observation data, and constructing a high-resolution ocean analysis data set which is subjected to quality control, space-time registration, standardization and data set division processing through multi-source observation data fusion and numerical mode assimilation; constructing a basic prediction model, and performing multi-scale fusion on the frequency domain enhanced features and the spatial local features by using the basic prediction model; the trained basic prediction model is operated in a set area range, and an output result of the basic prediction model is recovered to an original physical quantity value through inverse standardization; and comparing the rolling output of the basic prediction model with observation data or a high-resolution mode result through a correction module, learning an error, outputting a correction quantity, and superposing the correction quantity with an original prediction result to obtain a prediction field. According to the technical scheme, the problem that the ocean forecasting model in the prior art cannot meet the requirement of a complex application scene is solved.

The invention discloses a bed load particle starting test method and device, and relates to the technical field of hydromechanics, the method comprises the following steps: laying sediment particles in a wave water tank, and adjusting the water flow rate through flow control until the bed surface shear stress is less than the critical shear stress; tracer particles are excited to emit fluorescence through a laser beam, and a camera array is used for synchronously collecting instantaneous flow velocity of a flow field and displacement data of sediment particles; analyzing spatial and temporal distribution characteristics of turbulence energy dissipation and pressure energy dissipation based on a turbulence burst process, and establishing a sediment particle starting mathematical model; experimental data and computational fluid mechanics numerical simulation are combined, and the mathematical model is verified and optimized. According to the technical scheme, the analysis precision and the experimental convergence speed of the sediment starting criterion under the complex hydrodynamic force condition can be remarkably improved, and full-chain efficient cooperation from micromechanical response to macroscopic engineering application is achieved.

The utility model relates to the technical field of model tests, and discloses a landslide damage simulation test device which comprises a model test box, a rainfall frame, a hydraulic assembly, a plurality of spraying assemblies, a water tank assembly and a constant temperature system. The angle of the landslide model box can be adjusted through the hydraulic machine so as to change the slope of a model test landslide soil body; the multiple spraying assemblies are arranged at the top of the rainfall frame and located over the model test box, the output ends of the spraying assemblies aim at a test soil body in the model test box, the influence of rainfall on landslide slippage is simulated by adjusting the spraying size, and the constant temperature system is arranged at the top of the model test box and used for regulating and controlling the temperature of the test soil body. The constant temperature system is used for measuring the influence of the dry-wet cycle effect on the landslide soil body.

The invention relates to the technical field of PIV (particle image velocimetry) flow field testing devices, in particular to an internal peeping type PIV testing device and method for an internal flow field of turbomachinery, and the device comprises the turbomachinery, a testing assembly and a connecting assembly. The testing assembly comprises a lighting mechanism, a camera shooting mechanism, a laser mounting pipe arranged on the air inlet pipe, a mounting base arranged on the laser mounting pipe and a camera shooting mounting mechanism arranged on the air inlet pipe, and the connecting assembly comprises an inserting mechanism arranged on the laser mounting pipe and a connecting mechanism arranged on the camera shooting mechanism. Through the arrangement of the mounting base and the camera mounting mechanism, a laser light source emitter and a camera are quickly mounted, the camera can adapt to various special-shaped shells such as volutes, the angle of a sheet light source emitted by the laser light source emitter is quickly adjusted through the arrangement of a rotating pipe, and the angle of the sheet light source is adjusted through the arrangement of a connecting mechanism and an inserting mechanism. And the sheet light source emitted by the laser light source emitter is quickly perpendicular to the shooting direction of the camera mechanism again.

The invention relates to a saline intrusion measurement method, system and equipment based on dynamic ship motion conditions and a medium, and aims to solve the technical problem that the salinity inversion precision is reduced due to spatial-temporal dislocation between particle image velocity measurement flow field data and plane laser-induced fluorescence concentration field data caused by ship six-degree-of-freedom motion. According to the method, future poses are predicted by collecting ship motion parameters and environment disturbance parameters, and space-time compensation parameters are generated in combination with a static calibration matrix; performing three-dimensional coordinate transformation and time synchronization on synchronously acquired original flow field and concentration field data by applying compensation parameters, and eliminating space-time deviation caused by ship movement; a three-dimensional salinity distribution field is calculated based on registration data fusion flow field diffusion characteristics and concentration field distribution; and meanwhile, the pose of the measuring equipment is dynamically adjusted through the closed-loop controller so as to optimize the data acquisition quality. According to the method, ship motion interference is effectively inhibited, and accurate characterization of saline invasion frontal surface spatial characteristics is guaranteed.

The invention provides a method and system for measuring resistance in an underwater vehicle towing test, and relates to the technical field of underwater vehicle hydrodynamic performance testing, and the method comprises three links of gravity center adjustment, measurement data processing and uncertainty analysis. Firstly, it is ensured that the gravity center and the buoyancy center of a test model are consistent in height, model attitude stability is ensured, and resistance measurement errors caused by attitude changes are eliminated. Secondly, measuring the sailing resistance of the test model in the towing test, and post-processing the measured data to obtain the total resistance coefficient of the test model at the test temperature; and finally, quantizing errors of each link and synthesizing expansion uncertainty by adopting a deviation limit and precision limit combined uncertainty analysis method. Compared with a traditional single-index evaluation method, the method not only can reveal error sources and quantify the influence of each link on the measurement result, but also can accurately reflect the composite effect of errors, and ensures the reliability of the resistance measurement result.

The invention discloses a riverway three-dimensional water flow numerical simulation method, and relates to the technical field of intelligent water conservancy simulation, and the method comprises the steps: generating a longitudinal long and narrow hexahedral mesh of a main riverway in a C gradient direction through employing a mucous network growth algorithm, and outputting a hexahedral mesh with a shear layer identifier; turbulence viscosity coefficient distribution is dynamically initialized through a DDPG reinforcement learning model, and turbulence parameters are output; inputting the hexahedral mesh with the shear layer identifier and turbulence parameters into a coupling solver, performing parallel numerical solution, and outputting transient flow field data; a lambda 2 criterion is adopted to identify a vortex core area and calculate a vorticity modulus, a transverse circulation is defined, an on-way distribution cloud picture is generated, an immersive VR scene is constructed through a Unity 3D engine, and a three-dimensional visual water flow simulation scene with a physical feature label is output. Through fusion of lambda2 criterion vortex identification and a Unity 3D visualization technology, a complete solution with both calculation precision and engineering practicability is provided for river flow simulation.

The invention belongs to the technical field of fluid tests, and relates to a water tunnel test device and a test method. The device comprises two water cabins and a water tunnel test section, air bags are arranged in inner cavities of the two water bins, the two air bags are communicated with an external compressed air source through breather pipes respectively, water cavities are formed between the air bags and the inner walls of the water bins where the air bags are located, and the water cavities are filled with water. A water inlet of the water tunnel test section is respectively communicated with the water cavities of the two water cabins through a water inlet three-way valve, and a water outlet of the water tunnel test section is respectively communicated with the water cavities of the two water cabins through a water outlet three-way valve. According to the invention, through inflation and deflation operation of the two air bags and regulation and control of working states of the water inlet three-way valve and the water outlet three-way valve, water circularly flows between the two water cabins and continuously flows through a water tunnel test section, so that closed cycle operation of a water tunnel test is realized through an air pressure loading mode; the problems that due to the fact that an existing closed circulating water tunnel system is directly pressurized through a pump, water flow direction conversion is complex, test stability is poor, and pressure change is difficult to accurately control are solved.

The invention provides a micro-flow field measurement method of a mechanical biological net port flowmeter, and belongs to the technical field of micro-flow field measurement, and the micro-flow field measurement method comprises the following steps: firstly, constructing a net port cavity digital model, and realizing micro-flow field high-resolution characterization by using fluorescent particle tracing liquid and a laser confocal system; and recording a fluid movement track and processing original data by applying a track optimization function under the condition that the microfluidic driving system generates a constant pressure gradient. And solving fluid pressure distribution by adopting an orthogonal grid system and a Navier-Stokes equation, and processing speed field and pressure distribution data by utilizing a pre-trained micro-flow field analysis neural network model. Finally, the flow and pressure relation curve is obtained by calculating the flow flux of the cross section of the network port, a micro-flow field measurement correction coefficient table is generated, and the technical problems that in the prior art, the accurate measurement difficulty of the biological network port micro-flow field is large, and multi-scale flow characteristic representation is insufficient are solved.

An internal solitary wave (ISW) early warning method for an offshore platform based on a baroclinic mode includes the following steps: S1: providing a hydrophone and a bottom-founded transmitting transducer in a sea area of an offshore platform, and acquiring an actually measured sound pressure; S2: solving a hydrodynamic equation to obtain a baroclinic mode of the sea area of the offshore platform; S3: constructing a seawater sound velocity equation according to the baroclinic mode; S4: transforming the seawater sound velocity equation to obtain a relational expression between an amplitude of the baroclinic mode and a seawater sound velocity; S5: solving, according to the actually measured sound pressure, and the relational expression between the amplitude of the baroclinic mode and the seawater sound velocity, the amplitude of the baroclinic mode with a genetic algorithm (GA); and S6: performing monitoring and early warning on an ISW.

The invention relates to the field of aero-engine bearing cavity structure system testing, and particularly provides an aero-engine bearing cavity inner lubricating oil flow state measuring system which comprises a test piece main body simulating an aero-engine bearing cavity, an oil gas supply and recovery system and a control system. The test piece main body comprises a rotor test piece and a stator test piece which are connected together, and the oil gas supply and recovery system comprises an oil supply system, a gas supply system, an oil return pool and an oil gas separation pump. The control system comprises a controller, and an oil supply throttle valve, an air supply throttle valve, an exhaust throttle valve, a test data acquisition assembly and a test piece main body driving device which are in signal connection with the controller. On the basis of the method, the lubricating oil-air flowing state in the bearing cavity can be monitored and evaluated in real time, and test support can be provided for follow-up bearing cavity optimization design.

The invention discloses a long-distance high-pressure water delivery pipeline water hammer and leakage monitoring and positioning test device, which comprises a water tank, a water outlet side experiment unit, a water return side main path experiment unit and a water return side branch experiment unit, and is characterized in that the water outlet side experiment unit and the water return side branch experiment unit are communicated with the water return side main path experiment unit; the water outlet side experiment unit, the water return side main path experiment unit and the water return side branch path experiment unit are all communicated with the water tank. The device solves the problem that tiny leakage is difficult to monitor in the high-pressure water delivery process in the existing related test experiment technology, and the problems that the water hammer experiment signal precision acquisition is insufficient and the water hammer experiment causes impact damage to equipment. The invention further discloses a using method of the long-distance high-pressure water conveying pipeline water hammer and leakage monitoring and positioning testing device.

The invention discloses a submarine floating icebreaking load measurement test device and a submarine floating icebreaking load measurement test method. The submarine floating icebreaking load measurement test device comprises a test box, an ice block clamp, a moving assembly, a lifting assembly, an angle adjusting assembly and an observation assembly. Wherein the ice block clamp, the moving assembly, the lifting assembly and the angle adjusting assembly are all arranged in the test box, the ice block clamp is used for fixing ice blocks, the moving assembly is used for driving the submarine model to move in the horizontal direction, the lifting assembly is used for driving the submarine model to move in the vertical direction, and the angle adjusting assembly is used for adjusting the pitch angle of the submarine model. The observation assembly is used for recording the stress condition and the water outlet posture of the submarine model. According to the test device, the position and posture of the submarine model can be adjusted through the moving assembly, the lifting assembly and the angle adjusting assembly, so that different icebreaking conditions are simulated; and the icebreaking process of the submarine model is recorded through a force sensor and a camera. The invention relates to the field of submarine icebreaking test research.

The invention discloses an offshore floating type thin film photovoltaic platform model test device for simulating different accumulated water, and relates to the technical field of offshore photovoltaic power generation, the offshore floating type thin film photovoltaic platform model test device comprises a fluid diverter, a sprinkler head array and a thin film photovoltaic platform model, the water spraying head array is installed above the thin film photovoltaic platform model, the fluid flow divider is connected with the water spraying head array, and the fluid flow divider can adjust water flow distribution of the water spraying head array. Through cooperative work of the wave generator and the rainfall system, complex dynamic response, such as a floating state, a motion characteristic and a mooring stress condition, in an extreme environment can be simulated, high-precision test data is provided for platform design, potential problems in the design can be found in time, the structural performance is optimized, and the test efficiency is improved. The safety and reliability of the floating photovoltaic power generation platform in an extreme environment are improved, and further development of the photovoltaic power generation technology is promoted.

The invention discloses a multifunctional experimental device capable of realizing a wind wave coupling effect, which comprises a deep water experimental area, a transition experimental area and a shallow water experimental area, and is characterized in that a lifting floating bottom mounted at the bottom of a water tank can simulate the elevation change from a deep sea to a shallow sea seabed; a wind generating system is assembled above the water tank and is matched with the flow guide arrays on the two sides to provide a high-quality wind field for the experimental water tank; the L-shaped wave maker can make multi-directional irregular waves, the wave flow experiment water tank and the wind making system are used for constructing a target joint field required by an experiment, and the whole process that the waves are gradually propagated from deep sea to shallow sea under the wind wave coupling effect can be achieved. The device has multiple functions of wind generation, wave generation, current generation and the like, has the function of simulating various load factors which mainly influence ocean engineering structures, and compared with an existing experimental device, the device can achieve the real wind and wave coupling effect, more truly and completely simulate the whole process of ocean wave propagation, and the experimental device has the advantages of being simple in structure and convenient to use. And a more accurate marine simulation environment is provided for experiments.

The invention belongs to the technical field of underwater vehicle testing, and particularly relates to a testing device for simulating an actual ocean service environment and a using method of the testing device. The experimental device comprises a box body, a bottom plate detachably installed on the box body, a plurality of simulation areas arranged on the bottom plate or the side wall of the box body, a wave making mechanism and a water depth pressure simulation mechanism installed on the side wall of the box body, a sea wind simulation mechanism installed on the box body, a first illumination module and a plurality of first visual capture modules. The wave making mechanism, the water depth pressure simulation mechanism and the sea wind simulation mechanism are arranged to form an ocean service environment, a plurality of simulation areas are arranged on the bottom plate or the side wall of the box body, and the height of the multiple three-dimensional lifting columns relative to the polygonal sinking surface is adjusted through the corresponding telescopic driving mechanisms to simulate the ocean seabed landform. Different working environments are provided for a test object, and the problems that in the prior art, due to the fact that the difference between the simulated marine environment and the actual environment is large, appearance optimization design cannot be carried out, and service performance cannot be comprehensively evaluated are solved.

The invention discloses a flow field measurement system and method fusing event data and a blurred image, and the method comprises the steps: turning on a sheet-shaped light source, and enabling the sheet-shaped light source to illuminate tracer particles in a gas flow field; starting a gas flow field to enable the gas flow field to carry the tracer particles to flow through the transparent box body; capturing the motion change of the tracer particles in real time through an event camera, and collecting event data; blurred images of the tracer particles are synchronously collected through an industrial camera; based on the event data and the blurred image, reconstructing a clear moving image at any moment by using an image deblurring technology EDI; and carrying out time synchronization and space alignment on the clear moving image and the high-resolution static image, and extracting flow field information in the gas flow field in combination with the movement track and brightness change of the particles. According to the method, the high-speed dynamic capture capability of the event camera and the high spatial resolution of the industrial camera are combined, the bottleneck of the spatial-temporal resolution in the traditional flow field measurement technology can be effectively overcome, and meanwhile, the method has a relatively good effect in a complex flow field and a high-speed dynamic scene.

The invention discloses a distributed sound wave sensing monitoring device and method for sea wave impact force. The device comprises a vibration sensing optical fiber, an anchoring unit, a distributed optical fiber sound wave sensing demodulator, a vibration signal processing unit and a sea wave impact force inversion unit. The method comprises the following steps: fixing the vibration sensing optical fiber on a coast impacted by sea waves through the anchoring unit; the distributed optical fiber sound wave sensing demodulator transmits a monitored sea wave vibration signal to the vibration signal processing unit for preprocessing; the vibration signal processing unit transmits the processed optical fiber vibration amplitude signal to the sea wave impact force inversion unit; obtaining an optical fiber vibration amplitude signal and sea wave impact force training data set through a calibration experiment, and constructing an attention convolutional neural network model for training; and the sea wave impact force inversion unit establishes a corresponding relation between the optical fiber vibration amplitude signal and the sea wave impact force by using an attention convolutional neural network model to obtain the real impact force of the coast sea wave. According to the invention, accurate monitoring of the coastal wave impact force is realized.

The invention discloses a space variable gravity fluid storage tank in-orbit motion simulation experiment device in the technical field of space in-orbit fluid management, and the device comprises an experiment storage tank which is used for storing experiment fluid; the experiment storage box is transparent, so that a gas-liquid interface in the storage box can be observed outside the experiment storage box; the rotating mechanism is used for driving the experiment storage box to rotate so as to adjust the included angle between the experiment storage box and the centrifugal acceleration direction of the variable-gravity centrifugal platform and simulate the morphology change of a gas-liquid interface during rotating motion; the vibration mechanism is used for driving the experiment storage tank and the rotating mechanism to simultaneously perform linear reciprocating motion so as to apply translation and low-frequency vibration disturbance to the experiment storage tank and simulate the gas-liquid interface morphology change and instability phenomenon in the process that the gas-liquid interface is disturbed by external force; the experiment storage box, the rotating mechanism and the vibrating mechanism are all installed on the variable-gravity centrifugal platform.

The invention discloses an L-shaped wind wave flow-earthquake simulation system and method suitable for a high gravity field, the simulation system comprises a model box, a wind generation system, an L-shaped wave generation system, a flow generation system and a vibration seabed model, and the model box is used for accommodating and installing each system and is arranged on a rotating arm of a centrifugal machine in an up-and-down swinging manner; the wind generation system is used for forming horizontal airflow circulation, the L-shaped wave generation system is used for generating waves, the flow generation system is used for generating flow, and the vibration seabed model is used for researching interaction between a maritime work structure and seabed soil under various sea conditions. The simulation system can reproduce sea wind, wave, ocean current and earthquake scenes in a high gravity field.

The invention provides a multi-degree-of-freedom coupling execution mechanism for deflection of a water tunnel test model. The multi-degree-of-freedom coupling execution mechanism comprises a shell, an attack angle motion module, a yaw motion module and a rolling motion module, wherein the attack angle motion module, the yaw motion module and the rolling motion module are arranged in the shell; according to the mechanism, in the aspect of attack angle motion, a pitching motor drives a pitching lead screw through a mechanical transmission assembly, and control over the attack angle of a model balance component can be achieved by combining a translation sliding block and a pitching sliding block which slide in a matched mode in the height direction. The yaw movement module drives a yaw lead screw through a yaw motor, a pitching arc-shaped guide rail is stably pushed to move along the yaw arc-shaped guide rail through a yaw sliding block, and accurate adjustment of the yaw angle is achieved. The rolling motion module effectively realizes the rolling action of the model balance component through a rolling motor; the pitching, yawing and rolling motion modules can be independently controlled and can also be controlled in a coupling mode, the unique design greatly improves the flexibility and adaptability of mechanism motion control, and various complex working condition requirements can be accurately met.

The invention discloses a linear array data processing method for surface pulse pressure wave number-frequency spectrum measurement. A one-dimensional linear array is adopted to carry out a pulsating pressure measurement test, a model surface time domain signal is obtained, an array signal cross-spectrum matrix is calculated, and a flow direction wave number-frequency spectrum result is obtained through calculation by taking the cross-spectrum matrix as input. The method is directly obtained through a turbulent boundary layer pulsating pressure flow direction wave number-frequency spectrum physical definition formula and has direct relevance with the physical definition formula, the cross spectrum matrix method is applied, the calculation and analysis capacity is greatly improved, parallel calculation can be adopted in cross spectrum matrix calculation, a direct discrete algorithm and an average discrete algorithm, and the calculation speed is greatly improved.

The invention discloses a multifunctional wind wave and flow coupling experiment platform, and belongs to the technical field of bridge engineering. The experimental platform comprises a wind power system and a water power system, the wind power system is of a two-layer structure, the upper layer is an unsteady wind tunnel, and the lower layer is a steady wind tunnel; the hydrodynamic system is located below the steady wind tunnel; the steady wind tunnel is of a sealed annular structure, and a fan, a first experimental section and a second experimental section are arranged in the steady wind tunnel; the unsteady wind tunnel is arranged above the second experiment section, and interaction windows A which are communicated with each other are formed between the unsteady wind tunnel and the steady wind tunnel; the hydrodynamic system is located below the second experiment section, and an interaction window B which is communicated with the steady wind tunnel is formed between the hydrodynamic system and the steady wind tunnel; the unsteady wind tunnel, the steady wind tunnel and the hydrodynamic system are communicated with one another through the two interactive windows. The experimental platform can simulate different coupling action environments of wind, waves and flows, and is used for testing the stability, reliability and durability of various ocean engineering structures and equipment.

The invention discloses an internal solitary wave detection method based on Rossby modal hydrodynamic parameters, and relates to the field of internal solitary wave detection, and the method comprises the following steps: obtaining an acoustic signal of a target area; acoustic inversion is carried out; reconstructing sound velocity profile amplitude to obtain a plurality of sound velocity profile amplitude values; acquiring an amplitude function changing along with the depth; under the condition that the influence of a background flow field is not considered, nonlinear parameters in a KdV equation of a nonlinear internal solitary wave of shallow water are calculated; judging whether the nonlinear parameter is greater than a threshold value or not, and if so, judging that an inner solitary wave is generated; otherwise, judging that the internal solitary wave is not generated. According to the method, the disturbance of the sound velocity profile is represented through the change of the amplitude of the sound velocity profile, the change of nonlinear parameters is calculated based on the KdV equation of the nonlinear internal solitary wave of shallow water, and the generation, propagation and amplitude of the internal solitary wave are clearly monitored and predicted in real time through the relationship between the value of the nonlinear parameters and the threshold value. Large-range, real-time and economical internal solitary wave detection and early warning can be realized.

The invention discloses an evaluation method for improving the accuracy of a wave energy device test and a numerical model, and particularly relates to the field of wave energy tests. The method comprises the following specific steps of preliminary parameter acquisition and modeling, multi-scale test design, multi-medium multi-physical field coupling simulation, data fusion and multi-model calibration, dynamic adaptability optimization and performance evaluation standard establishment. According to the invention, multiple technical means such as multi-scale test, multi-physical field coupling simulation, data fusion calibration, dynamic adaptability optimization and the like are combined, so that the performance evaluation capability of the wave energy device can be comprehensively improved; a systematized test and digital-analog optimization process and a preliminary parameter acquisition and modeling method are provided, so that the digital-analog simulation and test accuracy of the wave energy device can be improved; the invention provides a wave energy device evaluation standard and process with higher accuracy and applicability, so as to ensure that digital-analog simulation and physical tests can better reflect the actual performance of a prototype, and provide powerful technical support for the development and optimization of the wave energy device.

The invention discloses a cabin section structure capable of verifying the deformation coordination capability of a large buoyant raft vibration isolation system, which comprises a pressure-resistant hull shell plate and pressure-resistant hull ribs, and is characterized in that the sizes of the pressure-resistant hull shell plate and the pressure-resistant hull ribs are the same as the structural parameters of a real ship; the cabin section structure further comprises an end-thickened pressure-resistant shell ring, an oversized rib and a buoyant raft base. The end-thickened pressure-resistant shell rings are arranged at the two ends of the pressure-resistant hull shell plate. The oversized ribs are arranged at the two ends of the cabin section structure, and the distance between the two oversized ribs is equal to the distance between the two cabin walls of the underwater vehicle; the buoyant raft base is installed near the horizontal center line of the port and the starboard of the pressure-resistant hull shell plate. According to the cabin section structure, actual structure parameters of a real ship are adopted, a large external pressure test device is adopted for simulating the bearing condition which is consistent with the actual bearing of the real ship, real deformation can be accurately generated, and the most direct basis is provided for verifying the deformation compensation capacity of elastic components of the buoyant raft system under the limit depth.

The present invention provides a flow diversion device based on a one-way water pool, which relates to the field of ship engineering technology, and solves the technical problem that a physical model will cause wave damage in a one-way water pool in a wind and wave test, resulting in inaccurate experimental data. The flow diversion device includes a physical model, a lifting device, a flow diversion device and a water pool; the water pool has a first pool bottom and two oppositely arranged pool side plates, and the two pool side plates and the first pool bottom are arranged in a U-shaped structure; the lifting device is used to change the height of the physical model in the water pool; one end of the flow diversion device is hinged to one side of the incoming flow direction of the physical model, and the other end is slidably arranged on the first pool bottom of the water pool; when the physical model has a preset height from the first pool bottom of the water pool, the flow diversion device guides the incoming flow from the first pool bottom of the water pool to the physical model. The flow diversion device ensures that the physical model will not cause wave damage during the wind and wave impact test, thereby ensuring the accuracy of the experimental data.

The invention discloses a three-dimensional large-size dynamic water grouting simulation diffusion test device and a test method, and belongs to the technical field of dynamic water grouting engineering. The test device comprises a variable-pressure water supply device, a grouting device, a simulation grouting pipeline and a monitoring system. The simulated grouting pipeline comprises a water inlet pipeline, a grouting pipeline and a drainage pipeline, and the grouting pipeline can be split into an upper part and a lower part, so that the grouting plugging body can be conveniently taken out for subsequent research. The monitoring system comprises a pressure sensor, an ultrasonic flowmeter, a high-speed camera, a computer, a distributed optical fiber and an optical fiber decoder. According to the testing device and the testing method, the plugging performance of the slurry in the flowing water karst pipeline under the complex geological condition can be measured, the optimal construction parameters are selected according to site conditions, and research on flowing water grouting slurry rheological characteristics and a diffusion theoretical model is achieved through the optical fiber monitoring technology.

The invention discloses an indoor water tank sediment pushing characteristic acquisition system and method, the system mainly comprises a water tank main body, a buffer unit, a drainage adjusting unit, a sediment throwing device, an imaging unit, an adjustable support and a data processing unit, and according to the method, non-contact data acquisition is carried out through a high-definition camera and a three-dimensional terrain measuring instrument; automatic identification, parameter extraction and migration speed calculation of landforms such as sand waves are achieved, the sediment bed surface is not touched in the whole process, damage to the bed surface form caused by traditional contact type measurement is eliminated, and the authenticity and reliability of data are ensured. Meanwhile, the buffer design of the combination of the flow slowing plate and the multi-stage water baffle is adopted, the kinetic energy of water flow is effectively dissipated through the graded water outlet structure, the impact force of injected water flow is greatly reduced, the bed surface is prevented from being scoured in the initial water injection stage, and the stability of the initial test condition is powerfully protected.

The invention is suitable for the technical field of rock grouting reinforcement, and relates to a visual crossed fracture flowing water grouting test device and method. A transparent soil material with soil force properties and hydraulic properties similar to those of natural soil such as an internal friction angle, a deformation characteristic and a flow boundary effect is adopted; the water flow and slurry flowing state in an actual stratum can be truly simulated, and the accuracy of a test result is remarkably improved; by means of the layered water injection design of the soil filling box, comprehensive observation of the grouting behavior rule of cross fractures in stratums in different water saturation states is achieved, and the influence of complex hydrological conditions on the grouting effect is effectively reproduced; and a tracer agent with observation advantages is introduced in the grouting process, so that the visual observation capability on the slurry diffusion path, the slurry diffusion range and the flow velocity change is greatly enhanced. According to the method, the diffusion path, the expansion range and the grouting effect of the grout in a deep crack and a large model can be visually observed, the grouting effect is greatly improved, and a scientific basis is provided for optimizing the grouting process and predicting the grouting effect.