CN110553939B - Indoor test platform for simulating marine multiphase load coupling effect - Google Patents
Indoor test platform for simulating marine multiphase load coupling effect Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0026—Combination of several types of applied forces
Abstract
The application provides an indoor test platform for simulating marine multiphase load coupling effect in the technical field of marine load simulation. In the test, the soil tank for placing the soil sample is arranged at the bottom of the middle section of the small wave current water tank, and the water flow and wave action in the small wave current water tank can be controlled and adjusted through a wave current system (mainly comprising a current generator and a wave generator), so that the wave current comprehensive action in the marine environment is realized. Meanwhile, the bottom of the soil tank is provided with two small horizontal vibration tables, the upper part of the soil tank is provided with a plurality of multidirectional power loading devices, and the multidirectional power loading devices can work in cooperation with a wave flow system, so that the simulation of the multi-field coupling effect is realized, and the multidirectional power loading devices can also be used independently to conduct the research on the aspects of earthquakes or power. Compared with the existing test device, the experimental device is simple to operate, occupies a small area, can simulate the marine multiphase load coupling effect, and develops the catastrophe mechanism and the bearing performance evolution of the foundation-soil body system under the multi-disaster effect of the offshore wind power, the offshore platform and the cross-sea bridge in the laboratory.
Description
Technical Field
The application belongs to the technical field of ocean load simulation, and particularly relates to an indoor test platform for simulating ocean multiphase load coupling effect.
Background
The 21 st century is called the century for ocean resource development, and various countries in the world take ocean development and ocean economy development as national development important strategies. The ocean engineering safety is seriously threatened by natural disasters such as earthquake, wave, tide, storm and the like. In water conservancy, harbour, coast and coastal engineering, structures are subjected to the combined action of horizontal load and moment caused by extreme conditions such as storm, wave, water current and the like, and are easy to incline or even overturn, which causes huge economic loss to the country and people. In recent years, China also vigorously implements the 'science and technology sea-going and law-governing sea' strategy. Therefore, research on the aspects of multi-disaster effects is actively carried out by scientific research institutes and key laboratories at home and abroad, a batch of test centers aiming at specific disaster conditions are established, and a series of corresponding test equipment is developed. But the existing test equipment at home and abroad has the problem of single simulation condition. The existing related test equipment is mainly divided into two types, one type is a wave flow laboratory, and the other type is a rock-soil model test groove. Traditional wave flow laboratories, such as the federal highway administration water conservancy laboratory, have focused on the hydraulic properties of marine structures, regardless of geotechnical media and structure-soil interactions. However, in the domestic laboratories, such as the coast of the university of the great chain of workers and the national key laboratory of offshore engineering, and the national key laboratory of the oceaneering transportation university, the problems that the water and soil tests are separated, the wave can be generated only in one direction and the like exist. And the rock-soil model test tank can not simulate the wave flow effect and can not consider the coupling problem of complex water flow conditions. The establishment of an indoor test platform simulating marine multiphase load coupling is necessary for developing research on offshore wind power, offshore platforms and sea-crossing bridges under the action of multiple disasters.
Disclosure of Invention
The utility model aims to overcome prior art's not enough, an indoor test platform of simulation ocean multiphase load coupling effect is provided, through the organic combination of dynamic water conservancy loading system and many physics field analog system, simulate earthquake effect through setting for shaking table and multidirectional power loading device dynamic parameter, contact scour of the soil body in the ocean is simulated through adjusting dynamic water conservancy loading system hydraulic parameter, utilize monitoring facilities observation record soil body deformation's emergence and evolution process, overcome the problem that has test equipment simulation condition singleness, realize the simulation to ocean multiphase load coupling effect, provide the equipment foundation for developing marine wind power, offshore platform and cross-sea bridge research work under the calamity effect.
The purpose of the application can be realized by the following technical scheme:
an indoor test platform for simulating marine multiphase load coupling comprises a hydraulic loading system, an earthquake simulation system, a storm simulation system and a data acquisition and processing system; wherein the water conservancy loading system, the earthquake simulation system and the storm simulation system jointly form a multi-physical-field simulation system;
the hydraulic loading system comprises a water circulation device and a flow and wave generating system; the water circulation device adopts a small wave flow water tank, the flow making and wave making system comprises a flow making machine and a wave making machine, the flow making machine and the wave making machine are both fixed at the front end of the small wave flow water tank, waves with constant water flow or fixed parameters are generated in the small wave flow water tank in the test process, the hydraulic parameters of output fluid are controlled by adjusting the flow making machine and the wave making machine, the purpose of dynamic hydraulic loading is achieved, and water flows generated by the flow making machine and the wave making machine in the test process form a complete loop in the small wave flow water tank; simultaneously both ends respectively are equipped with a grit chamber around small-size ripples basin is inside, and the grit chamber of front end is located and makes the rear of flowing and making the ripples system for get rid of original silt in the rivers, stabilize rivers simultaneously, the grit chamber of rear end is equipped with the filter screen at its top backward extension section, through reducing the velocity of flow and using the filter screen to retrieve the silt that the testing in-process rivers carried, in order to guarantee the purity of circulating water. When the test adopts water containing chemical reagent, need to add water purification installation at the grit chamber extension.
The earthquake simulation system comprises a soil tank and a bidirectional horizontal vibration table; the soil tank is arranged below the middle section of the small wave current water tank, a detachable top plate is arranged at the top of the soil tank, and the soil tank and the small wave current water tank are separated by the top plate of the soil tank; during testing, the top plate of the soil tank in the testing area is removed, and the top plate of the soil tank in the testing area is reinstalled after the testing is finished, so that the soil body of the soil tank is prevented from polluting the small wave flow water tank, and the tidiness of the testing environment is ensured; the soil tank is used for containing a test soil sample and is divided into a front section, a middle section and a rear section, the front section of the soil tank is used for generating a required dynamic hydraulic force condition, a wave flow state and a dark flow state, the left side and the right side of the middle section of the soil tank are provided with detachable baffles, local widening of a soil body in the soil tank can be realized according to requirements in a test, simulation of an earthquake and a vibration state is mainly completed in the section, a test object is placed on the test soil sample in the middle section of the soil tank through a lower structure of the test object in the test process, and the rear section of the soil tank is mainly used for ending and absorbing reflected; two bidirectional horizontal vibration tables are arranged at the bottom in the widening section of the soil tank, and input of different seismic waves is realized by changing seismic oscillation parameters applied to the bottom of the soil tank. When the bidirectional horizontal vibration table works, the driving shaft in the bidirectional horizontal vibration table rotates forwards or reversely to drive the crank-slider structure to move, and the crank-slider structure moves to drive the bidirectional horizontal vibration table to move, so that bidirectional vibration of the bidirectional horizontal vibration table in the front-back direction or the left-right direction is realized.
In this application, the test object can adopt reduced-scale bridge and offshore wind turbine model, and the test object is arranged in the soil box through its substructure.
The storm simulation system comprises a plurality of horizontal vibration exciters, the horizontal vibration exciters are used for carrying out dynamic loading on the upper structure of the test object in the small wave flow water tank, and dynamic response simulation under the storm effect of the upper structure of the test object is realized by changing dynamic parameters applied to the upper structure of the test object.
The height and the horizontal position of the horizontal vibration exciter can be adjusted according to the loading position required by the test object. Specifically, a longitudinal and transverse reaction frame is arranged in the area, located at the upper part of the soil tank, of the middle section of the small wave water channel, a reaction frame rail is arranged on the inner side wall of the small wave water channel at the lower end of the reaction frame, the reaction frame is movably arranged on the reaction frame rail and can horizontally move along the reaction frame rail according to the position of a test object, and the reaction frame is fixed through bolts after the horizontal position is determined; further, the horizontal vibration exciter is mounted on the reaction frame so as to be movable up and down.
The data acquisition and processing system comprises monitoring equipment and a feedback regulation and control device; the feedback regulation and control device is used for timely regulating the hydraulic loading system, the earthquake simulation system and the storm simulation system according to the real dynamic load input condition of the soil bottom and the upper structure of the test object fed back by the monitoring equipment in real time so as to achieve the purpose that the actual input load is consistent with the ideal input; the monitoring equipment comprises a flow rate tester, a laser displacement meter, an accelerometer, a stress strain acquisition system and a pore pressure sensor which are respectively connected with the feedback regulation and control device;
the flow velocity measuring instrument is arranged on the inner side wall of the small wave flowing water tank, is positioned between the grit chamber at the front end and the test soil sample, and is used for measuring the flow velocity and outputting the flow velocity to the feedback regulating and controlling device; the flow velocity measuring instrument cannot be too close to the test soil sample, so that the measured flow velocity is ensured to be the real flow velocity for scouring the soil body, and the influence of the flow velocity on the scouring process caused by the interference of the flow velocity measuring instrument on water flow is avoided; the feedback regulation and control device is connected with the flow generator and the wave generator, and drives the flow generator and the wave generator to adjust according to the flow speed parameters output by the flow speed tester so as to control the flow speed of water flow;
the laser displacement meter can be arranged above the middle section of the soil tank through a support connected with the side wall of the small wave flow water tank, and is used for measuring the deformation condition of the soil body and the distance between the laser displacement meter and a test soil sample and outputting the distance to the feedback regulation and control device, and the feedback regulation and control device can obtain the scouring deformation condition of the soil body according to the change condition of the feedback regulation and control device;
the contact surface of the bidirectional horizontal vibration table and the test soil sample, the inside of the test soil sample, the surface of the test soil sample and the upper structure surface of the test object are respectively provided with an accelerometer for respectively measuring the actual input value of earthquake motion, soil surface acceleration and foundation-structure strain and outputting the actual input value, the soil surface acceleration and the foundation-structure strain to a feedback regulation and control device, and bending moment and stress are further calculated through the existing program preset in a processor; meanwhile, the feedback regulation and control device is also connected with the bidirectional horizontal vibration table and regulates the dynamic parameters of the output seismic waves by controlling the bidirectional horizontal vibration table according to the data parameters output by the accelerometer;
the stress strain acquisition system and the pore pressure sensors in the pore pressure sensors are arranged according to a test scheme, can be installed in a soil tank test area and positioned below a test object, and transmit detected signals to the stress strain acquisition system for measuring the pore pressure change condition in the test process;
the feedback regulation and control device is preset with a storage component which is used for synchronously storing the data of the flow rate measuring instrument, the laser displacement meter, the accelerometer, the strain acquisition system and the pore pressure sensor in the test process so as to realize dynamic measurement; the feedback regulation and control device is also connected with the horizontal vibration exciter; the bidirectional horizontal vibration table, the flow and wave generating system and the horizontal vibration exciter can be controlled by the feedback regulation and control device respectively, and can be independently input or jointly input according to actual conditions.
The input of the accelerometer is connected with the acquisition device and is used for acquiring the actual input value of earthquake motion and the soil surface acceleration in real time, and the output of the accelerometer is connected with the drive of a multi-physical-field simulation system which is composed of a water conservancy loading system, an earthquake simulation system and a storm simulation system and is used for controlling the action and the speed of the vibration table and the vibration excitation device.
Compared with the prior art, the beneficial effect of this application lies in:
the method and the device can perform test simulation on marine multiphase load coupling, reflect the evolution process of soil deformation in the sea, and provide equipment support for researching the multi-disaster effect of offshore wind power, offshore platforms and cross-sea bridges. Meanwhile, the device has the advantages of simple structure, convenience in operation and small occupied area, and can quickly and efficiently evaluate the engineering characteristics of the engineering soil body and provide practical parameters for the engineering.
Drawings
FIG. 1 is a side view of an indoor test platform for simulating marine multiphase load coupling provided by an embodiment of the present application;
FIG. 2 is a top view of an indoor test platform for simulating marine multiphase load coupling according to an embodiment of the present disclosure;
FIG. 3a is a cross-sectional view of section 1-1 shown in FIG. 2;
FIG. 3b is a cross-sectional view of section 2-2 of FIG. 2;
fig. 3c is a cross-sectional view of section 3-3 shown in fig. 2.
Description of the reference numerals
1 is a small wave flow water tank, 2 is a soil tank, 3 is a test soil sample, 4 is a bidirectional horizontal vibration table, 5 is a flow and wave making system, 6 is a flow rate measuring instrument, 7 is a laser displacement meter, 8 is an accelerometer, 9 is a stress strain acquisition system and a pore pressure sensor, 10 is a grit chamber, 11 is a filter screen, 12 is water flow, 13 is a counter-force frame, and 14 is a horizontal vibration exciter.
Detailed Description
The following detailed description of the present application refers to the accompanying drawings and detailed description of specific embodiments.
As shown in fig. 1 to 3c, an indoor test platform for simulating marine multiphase load coupling comprises a small wave flow water tank 1, a soil tank 2, a test soil sample 3, a bidirectional horizontal vibration table 4, a flow and wave making system 5, a flow rate measuring instrument 6, a laser displacement meter 7, an accelerometer 8, a stress-strain acquisition system and pore pressure sensor 9, a grit chamber 10, a filter screen 11, a reaction frame 13, a horizontal vibration exciter 14 and a feedback regulation device.
Further, the soil tank 2 is equally divided into a front section, a middle section and a rear section, wherein the front section of the soil tank 2 is used for generating the required dynamic hydraulic force condition, wave flow state and dark flow state; detachable baffles are arranged on the left side and the right side of the middle section of the soil tank 2, local widening of soil in the soil tank 2 can be realized according to test requirements in an experiment, and simulation of earthquake and vibration states is mainly completed in the section; the rear section of the soil tank 2 is mainly used for ending and absorbing reflected waves and recovering silt generated in the test.
The flow making and wave making system 5 comprises a flow making machine and a wave making machine, wherein the flow making machine and the wave making machine are both fixed at the front end of the small-sized wave flow water tank 1, waves with constant water flow or fixed parameters are generated in the small-sized wave flow water tank 1 in the test process, and the hydraulic parameters of output fluid are controlled by adjusting the flow making machine and the wave making machine, so that the purpose of dynamic hydraulic loading is achieved. The small wave water flow tank 1 is provided with a grit chamber 10 at the rear of the flow and wave making system 5 to remove the original silt in the water flow and stabilize the water flow. The rear end of small-size wave water current groove 1 is provided with grit chamber 10 equally, and the section of extending backward in small-size wave water current groove 1 rear end grit chamber 10 top is equipped with filter screen 11, retrieves the silt that the test in-process rivers carried through reducing the velocity of flow and using filter screen 11 to guarantee the purity of circulating water. When water containing chemical reagents is used for the test, a water purification device is required.
Two bidirectional horizontal vibration tables 4 are arranged at the bottom in the widening section of the soil tank 2, and input of different seismic waves is realized by changing seismic oscillation parameters applied to the bottom of the soil tank 2.
The middle section of the small wave water channel 1 is provided with a longitudinal and transverse reaction frame 13 at the upper part of the region of the soil channel 2, the inner side wall of the small wave water channel 1 at the lower end of the reaction frame 13 is provided with a reaction frame rail, the reaction frame 13 can be arranged on the reaction frame rail in a back-and-forth moving way and horizontally moves along the reaction frame rail, and the small wave water channel can be fixed by bolts when moving to a specified position; the horizontal excitation device 14 is fixed on the reaction frame 13 through bolts, and dynamic response simulation under the storm effect of the upper structure of the test object is realized by changing dynamic parameters applied to the upper structure of the test object.
In the present application, the test object may adopt a reduced-scale bridge and an offshore wind turbine model in which a lower structure of the test object is placed in the soil tank 2.
And 4, the flow and wave generating system 5 and the horizontal vibration exciter 14 can be controlled by a feedback regulation and control device, and can be independently input or jointly input according to actual conditions.
The velocity of flow apparatus 6 is installed at the inside wall of small-size ripples flowing water groove 1 to be located between the grit chamber 10 and the experimental soil sample 3 of front end for the survey velocity of flow, feedback regulation and control device is through making the class machine, making ripples machine control and adjustment rivers velocity of flow according to the velocity of flow of survey.
The contact surface of the bidirectional horizontal vibration table 4 and the test soil sample 3, the inside of the test soil sample 3, the surface of the test soil sample 3 and the upper structure surface of the test object are all provided with accelerometers 8 which are used for measuring the actual input value of earthquake motion, soil surface acceleration and foundation-structure strain and further calculating by the existing program preset by the feedback regulation and control device to obtain bending moment and stress; the stress strain acquisition system and the pore pressure sensors in the pore pressure sensor (9) are arranged according to a test scheme, are arranged below a test object in a soil tank test area, and transmit signals to the stress strain acquisition system for measuring the pore pressure change condition in the test process.
In addition, the feedback regulation and control device can synchronously store the data of the flow rate measuring instrument 6, the laser displacement meter 7, the accelerometer 8, the strain acquisition system and the pore pressure sensor 9 in the test process, thereby realizing dynamic measurement.
The application provides a simulation ocean multiphase load coupling's indoor test platform's experimental step as follows:
step (1), opening a top plate of a soil tank 2 of a test soil sample area, and placing a test object in a test platform, wherein the test object comprises a lower structure arranged in the soil tank 2 and an upper structure connected with the lower structure;
step (2) opening a flow and wave generating system 5, injecting water into the small wave flowing water tank 1, and adjusting hydraulic parameters of output fluid through a feedback regulation and control device according to needs;
step (3) opening a flow velocity measuring instrument 6 to obtain the actual flow velocity, driving a flow generation and wave generation system 5 according to the output parameters of the flow velocity measuring instrument 6, and adjusting and controlling the flow velocity of water flow;
opening the bidirectional horizontal vibration table 4, and adjusting the power parameters of the output seismic waves through a feedback regulation and control device as required;
measuring an actual input value of earthquake motion, soil surface acceleration and foundation-structure strain through an accelerometer 8, adjusting and controlling input of earthquake waves, inputting obtained data into a feedback regulation and control device, and further calculating through an existing program to obtain bending moment and stress;
and (6) moving the reaction frame 3 to a required position set according to the test model parameters and the test scheme, and fixing the reaction frame by screws. Opening the horizontal vibration exciters 14, adding and adjusting the positions, the number and the parameters of the horizontal vibration exciters 14 according to actual needs, and realizing dynamic response simulation of the upper structure;
monitoring and recording data of a stress-strain acquisition system and a pore pressure sensor 8; the generation and development of soil deformation are observed through data output by the laser displacement meter 7;
and (4) after the test in the step (8) is finished, closing the flow and wave generating system 5, the bidirectional horizontal vibration table 4 and the multidirectional power loading device 13, opening a drainage valve, discharging pressure liquid, recovering deposited silt, cleaning a downstream filter screen and closing the bottom plate of the small wave flow water tank.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.
Claims (4)
1. The utility model provides a simulation ocean multiphase load coupling's laboratory test platform which characterized in that: the system comprises a hydraulic loading system, an earthquake simulation system, a storm simulation system and a data acquisition and processing system, wherein the hydraulic loading system, the earthquake simulation system and the storm simulation system jointly form a multi-physical-field simulation system;
the hydraulic loading system comprises a water circulation device and a flow and wave generation system (5); the water circulation device adopts a small wave flow water tank (1), the flow making and wave making system (5) comprises a flow making machine and a wave making machine, the flow making machine and the wave making machine are both fixed at the front end of the small wave flow water tank (1) and are used for generating waves with constant water flow or fixed parameters in the small wave flow water tank (1) in the test process, the purpose of dynamic hydraulic loading is achieved by adjusting hydraulic parameters of output fluid of the flow making machine and the wave making machine, and water flow generated by the flow making machine and the wave making machine in the test process forms a complete loop in the small wave flow water tank (1); meanwhile, the front end and the rear end of the interior of the small wave flow water tank (1) are respectively provided with a grit chamber (10), the grit chamber (10) at the front end is positioned behind the flow and wave making system (5), and the grit chamber (10) at the rear end is provided with a filter screen (11) at the top part of the grit chamber (10) in the backward extending section;
the earthquake simulation system comprises a soil tank (2) and a bidirectional horizontal vibration table (4); the soil tank (2) is arranged below the middle section of the small wave water flowing tank (1), a detachable top plate is arranged at the top of the soil tank (2), and the soil tank (2) is separated from the small wave water flowing tank (1) through the top plate of the soil tank (2); the soil tank (2) is used for containing a test soil sample (3) and is divided into a front section, a middle section and a rear section; the front section of the soil tank (2) is used for generating required dynamic hydraulic conditions, wave flow states and dark flow states; the left side and the right side of the middle section of the soil tank (2) are provided with detachable baffles, local widening of soil in the soil tank (2) can be realized according to requirements in a test, the simulation of earthquake and vibration states is mainly completed in the section, a test object is placed on a test soil sample (3) in the middle section of the soil tank (2) through a lower structure of the test object in the test process, and meanwhile, an upper structure of the test object is positioned in the small wave flow water tank (1); the rear section of the soil tank (2) is mainly used for ending and absorbing reflected waves and recovering silt generated in the test; two bidirectional horizontal vibration tables (4) are arranged at the bottom in the widening section of the soil tank (2), and input of different seismic waves is realized by changing seismic oscillation parameters applied to the bottom of the soil tank (2);
the storm simulation system comprises a plurality of horizontal vibration exciters (14), wherein the horizontal vibration exciters (14) are used for dynamically loading the superstructure of a test object in the small wave flume (1) and simulating the dynamic response of the superstructure of the test object under the storm action by changing the dynamic parameters applied to the superstructure of the test object;
the data acquisition and processing system comprises monitoring equipment and a feedback regulation and control device; the feedback regulation and control device is used for timely regulating the hydraulic loading system, the earthquake simulation system and the storm simulation system according to the real dynamic load input condition of the soil bottom and the upper structure of the test object fed back by the monitoring equipment in real time so as to achieve the purpose that the actual input load is consistent with the ideal input; the monitoring equipment comprises a flow velocity measuring instrument (6), a laser displacement meter (7), an accelerometer (8), a stress strain acquisition system and a pore pressure sensor (9) which are respectively connected with the feedback regulation and control device;
the flow velocity measuring instrument (6) is arranged on the inner side wall of the small wave flowing water tank (1), is positioned between the grit chamber (10) at the front end and the test soil sample (3), and is used for measuring the flow velocity and outputting the flow velocity to the feedback regulating and controlling device; the flow velocity measuring instrument (6) cannot be too close to the test soil sample (3), so that the measured flow velocity is ensured to be the real flow velocity for scouring the soil body, and the influence of the measured flow velocity on the scouring process caused by the interference of the measured flow velocity on water flow is avoided; the feedback regulation and control device is connected with the flow generator and the wave generator, and drives the flow generator and the wave generator to adjust according to the flow speed parameters output by the flow speed measuring instrument (6) so as to control the flow speed of water flow;
the laser displacement meter (7) is arranged on the side wall of the small wave flow water tank (1), is positioned above the middle section of the soil tank (2), and is used for measuring the deformation condition of the soil body and the distance between the laser displacement meter (7) and the test soil sample (3) and outputting the distance to the feedback regulation and control device, and the feedback regulation and control device can obtain the scouring deformation condition of the soil body according to the change condition of the feedback regulation and control device;
the contact surface of the bidirectional horizontal vibration table (4) and the test soil sample (3), the inside of the test soil sample (3), the surface of the test soil sample (3) and the upper structure surface of a test object are respectively provided with an accelerometer (8) for respectively measuring the actual input value of earthquake motion, soil surface acceleration and foundation-structure strain and outputting the actual input value, the soil surface acceleration and the foundation-structure strain to a feedback regulation and control device, and the bending moment and the stress are further calculated through the existing program preset in a processor; meanwhile, the feedback regulation and control device is also connected with the bidirectional horizontal vibration table (4), and adjusts the dynamic parameters of the output seismic waves by controlling the bidirectional horizontal vibration table (4) according to the data parameters output by the accelerometer (8);
the stress strain acquisition system and the pore pressure sensor (9) comprise a stress strain acquisition system and a pore pressure sensor which are connected with each other; the pore pressure sensor is arranged in a test area of the soil tank (2), is positioned below a test object and is used for transmitting a detected signal to the stress-strain acquisition system so as to measure the pore pressure change condition in the test process;
the feedback regulation and control device is internally preset with a storage component which is used for synchronously storing the data of the flow velocity measuring instrument (6), the laser displacement meter (7), the accelerometer (8), the strain acquisition system and the pore pressure sensor (9) in the test process so as to realize dynamic measurement; the feedback regulation and control device is also connected with a horizontal vibration exciter (14); the bidirectional horizontal vibration table (4), the flow and wave generating system (5) and the horizontal vibration exciter (14) are respectively controlled by a feedback regulation and control device.
2. The indoor test platform for simulating marine multiphase load coupling according to claim 1, wherein: when the test adopts water containing chemical reagents, a water purification device is additionally arranged on the extension section of the grit chamber (10).
3. The indoor test platform for simulating marine multiphase load coupling according to claim 1, wherein: the test object adopts a reduced-scale bridge and an offshore wind turbine model.
4. The indoor test platform for simulating marine multiphase load coupling according to claim 1, wherein: the inner side wall of the small wave water channel (1) is provided with a reaction frame rail; the reaction frame (13) is movably arranged on the reaction frame track and is positioned at the middle section of the small wave flow water tank (1); the horizontal vibration exciter (14) is arranged on the reaction frame (13) in a vertically adjustable manner.
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