CN108168841A - A kind of wave force simulating device in arm-type geotechnical centrifuge - Google Patents
A kind of wave force simulating device in arm-type geotechnical centrifuge Download PDFInfo
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- CN108168841A CN108168841A CN201810131002.2A CN201810131002A CN108168841A CN 108168841 A CN108168841 A CN 108168841A CN 201810131002 A CN201810131002 A CN 201810131002A CN 108168841 A CN108168841 A CN 108168841A
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- arm
- oscillating plate
- wave force
- simulating device
- geotechnical centrifuge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The invention discloses the wave force simulating devices in a kind of arm-type geotechnical centrifuge, and including model casing, internal is hollow structure, and upper part is equipped with case lid；Oscillating plate, horizontal to be set in the hollow structure, actuating unit is installed on the model casing, and is connected to the oscillating plate, and the actuating unit for the oscillating plate providing vibration force；Sea bed model, set on the bottom of the model casing, the sea bed model is providing soil layer；Liquid level, on the sea bed model, the liquid level of the liquid level is contacted with the oscillating plate；Sensor, set on the edge that the soil layer connects with the liquid level, the sensor acquiring pressure data in real time.
Description
Technical field
The present invention relates to arm-type geotechnical centrifuge, wave forces the fields such as to simulate, in specially a kind of arm-type geotechnical centrifuge
Wave force simulating device.
Background technology
Geotechnical centrifugal model test is a kind of PHYSICAL MODELING OF IN means, than the model soil body that prototype reduces n times, is being centrifuged
In the super gravity field of n times of acceleration of gravity that machine high speed rotation is provided, the stress field of each corresponding points is consistent with prototype in model,
Numerical value is identical.When the model soil body is identical with prototype, character particularly the resistance to shear of soil strain stress relation and intensity of prototype it is non-linear,
It can be reproduced to the greatest extent in a model.It is past if wave cycle can be simulated in centrifugal model test
Multiple active force, geotechnical centrifugal model test just become under wave condition, study underwater navigation channel slope stability, foundation deformation,
Soil and the optimal physical analogy means of works interaction.
At present, it is suitble to device, equipment or the test method of simulating dynamic wave force in arm-type geotechnical centrifuge few, it is main
Have：It is contactless to recycle wave load simulation system and pass through step motor control pressure conversion valve folding realization
Recycle the scheme of pressurization.The former has special requirement for the model preparation of experiment, and tests water level and be unable to accurate simulation；Afterwards
The output of person is limited.Therefore, it is necessary to develop a kind of device of simulation dynamic wave force in easy geotechnical centrifuge.
Invention content
The purpose of the present invention is：The wave force simulating device in a kind of arm-type geotechnical centrifuge is provided, to solve existing skill
An at least technical problem in art.
Realizing the technical solution of above-mentioned purpose is：Wave force simulating device in a kind of arm-type geotechnical centrifuge, including mould
Molding box, internal is hollow structure, and upper part is equipped with case lid；Oscillating plate, horizontal is set in the hollow structure, engine
Structure is installed on the model casing, and is connected to the oscillating plate, and the actuating unit for the oscillating plate providing vibration
Power；Sea bed model, set on the bottom of the model casing, the sea bed model is providing soil layer；Liquid level, positioned at the sea
On bed model, the liquid level of the liquid level is contacted with the oscillating plate；Sensor, set on the soil layer and the liquid level phase
The edge connect, the sensor acquiring pressure data in real time.
In an of the invention preferred embodiment, the soil layer include successively from bottom to up fine sand layer, farinose argillic horizon,
Silt clay layer and topsoil.
In a preferred embodiment of the invention, when carrying out wave force simulated experiment, the soil layer is equipped with a slope surface,
The slope surface extends from the fine sand layer to the topsoil.
In a preferred embodiment of the invention, the slope ratio ranging from 1 of the slope surface:2-1: 3.
In a preferred embodiment of the invention, the actuating unit includes motor, is fixed on the case lid, the case
It covers equipped with through-hole；Drive link, upper part are articulated with the arbor of the motor, and its underpart is articulated with described shake across the through-hole
The side of movable plate；Connector, upper part are fixed on the case lid, and its underpart is articulated with the center of the oscillating plate.
In a preferred embodiment of the invention, the motor is hinged with the drive link by an articulation piece；It is described to shake
Movable plate is hinged with the drive link by an articulation piece；The connector is hinged with the oscillating plate by an articulation piece.
In a preferred embodiment of the invention, the liquid level of the liquid level is flushed with the oscillating plate horizontal center line.
In a preferred embodiment of the invention, the wave force simulating device in the arm-type geotechnical centrifuge further includes
Data acquisition and analysis system, to acquire and analyze the pressure data that the sensor is acquired.
In a preferred embodiment of the invention, the sensor includes ventage piezometer.
It is an advantage of the invention that：Wave force simulating device in the arm-type geotechnical centrifuge of the present invention, can be more accurate
Effective simulated waves power, it is features simple structure, easily operated, and also cost is relatively low.
Description of the drawings
The present invention is further explained with reference to the accompanying drawings and examples.
Fig. 1 is the wave force simulating device structure diagram of the embodiment of the present invention.
Wave force simulating device sectional view when Fig. 2 is the experiment of the embodiment of the present invention.
Wherein,
1 model casing；2 oscillating plates；
5 liquid levels；6 sensors；
11 hollow structures；12 case lids；
31 motors；32 drive links；
33 connectors；34 articulation pieces；
41 fine sand layers；42 farinose argillic horizons；
43 silt clay layers；44 topsoil.
Specific embodiment
The explanation of following embodiment is with reference to additional schema, to illustrate the particular implementation that the present invention can be used to implementation
Example.The direction term that the present invention is previously mentioned, such as " on ", " under ", "front", "rear", "left", "right", " top ", " bottom " etc. are only
With reference to the direction of annexed drawings.Therefore, the direction term used is to illustrate and understand the present invention rather than to limit this hair
It is bright.
Embodiment, as shown in Figure 1, the wave force simulating device in a kind of arm-type geotechnical centrifuge, including model casing 1, shakes
Movable plate 2, actuating unit, sea bed model, liquid level 5, sensor 6 and data acquisition and analysis system（It is not shown）.
The inside of model casing 1 is hollow structure 11, and upper part is equipped with case lid 12.In the present embodiment, the setting growth of model casing 1
Cube.The predeterminated position of case lid 12 is equipped with through-hole.
Actuating unit includes motor 31, drive link 32, connector 33 and multiple articulation pieces 34.Wherein, motor 31 is horizontal
It is fixed on case lid 12, drive link 32 passes through the through-hole, and the top of drive link 32 is articulated with motor 31 by an articulation piece 34
Arbor on, the lower part of drive link 32 is articulated with the side of oscillating plate 2 by another articulation piece 34, the horizontal setting of oscillating plate 2
In hollow structure 11, connector 33 is fixed on the inner top surface of case lid 12, and connector 33 is articulated with vibration by an articulation piece 34
The center of plate 2.The actuating unit for the oscillating plate 2 providing vibration force.The amplitude of vibration can be by replacing different length
The drive link 32 of degree realizes amplitude；The frequency of vibration can be realized by the adjusting of 31 rotational frequency of motor.
Sea bed model is set on the bottom of the model casing 1, and to provide soil layer, sea bed model can include sea bed model
A kind of soil layer may also comprise a variety of soil layers, also may include works, and unlimited shape.In the present embodiment, soil layer is equipped with 4 layers,
Include fine sand layer 41, farinose argillic horizon 42, silt clay layer 43 and topsoil 44 successively from bottom to up.
Liquid level 5 is located on the sea bed model, and the liquid level of liquid level 5 is contacted with oscillating plate 2；In order to reach preferable survey
Effect is tried, in the present embodiment, the liquid level of liquid level 5 is flushed with 2 horizontal center line of oscillating plate.
Sensor 6 is ventage piezometer.The sensor 6 is set on the edge that the soil layer connects with the liquid level 5,
The sensor 6 acquiring pressure data in real time.Sensor 6 passes the pressure data to acquire pressure data in real time
It is handed to data acquisition and analysis system, data acquisition and analysis system is acquiring and analyze the number pressure that the sensor 6 is acquired
According to.Data acquisition and analysis system is common data acquisition and analysis system, this is repeated no more.
When carrying out wave force simulated experiment, the soil layer is equipped with a slope surface, and the slope surface is from the fine sand layer 41 to institute
State topsoil extension.The slope ratio ranging from 1 of the slope surface:2-1: 3.Preferably 1:2.5.
For example, the navigation channel system of certain harbour basin is badly in need of being extended, the gradient of navigation channel slope is larger to Project impact,
Navigation channel slope stability depends primarily on the intensity of the soil body itself, is still influenced by wave, trend and ship wave.Experiment utilizes this
The wave force simulating device and its test method in a kind of arm-type geotechnical centrifuge provided are invented, it is 1 to have carried out slope ratio:2.5
Stability study of the side slope navigation channel under action of wave force of dredging, for pattern layout referring to Fig. 2, the geometric proportion ruler of model is 1/
100, prototype wave frequencies are 0.4Hz, according to the centrifugal model test law of similitude, centrifugal acceleration 100g, wave force simulation dress
The vibration frequency put is 40Hz.
Test procedure is as follows：
Step S1）Side slope navigation channel model of dredging is prepared in model casing 1, refers to attached drawing 2, specifically, side slope of dredging navigation channel mould
Type includes 4 layers of soil, and the slope ratio of slope surface is 1:2.5；Ventage piezometer is embedded in the specific position of navigation channel slope surface；Model water level with
2 center of oscillating plate flushes.
Step S2）Oscillating plate 2 and 1 head cover of model casing are hinged；By connecting rod pass through 1 head cover of model casing on fluting and
Oscillating plate 2 is hinged；Motor 31 is fixed on 1 head cover of model casing；Connecting rod and motor 31 are hinged.
Step S3）1 head cover of model casing for installing device is fixed on model casing 1.
Step S4）Model casing 1 is lifted to centrifuge test platform；Sensor 6 is connected to data collecting system；It is logical
It crosses centrifugation acc power slip ring and provides power for motor 31.
Step S5）After starting the centrifugal acceleration that arm-type geotechnical centrifuge reaches given, start wave force simulating device, by force
The water body compeled in model casing 1 makees periodic motion, generates period effects power in water and carrys out simulated waves power, studies the shadow of wave force
It rings.
Step S6）Off-test, arresting stop stop centrifuge, and analysis model is subjected to the characteristic after action of wave force, tears open
Except model and device.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made within principle etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of wave force simulating device in arm-type geotechnical centrifuge, which is characterized in that including
Model casing, internal is hollow structure, and upper part is equipped with case lid；
Oscillating plate, horizontal is set in the hollow structure,
Actuating unit is installed on the model casing, and is connected to the oscillating plate, and the actuating unit is to for the oscillating plate
Vibration force is provided；
Sea bed model, set on the bottom of the model casing, the sea bed model is providing soil layer；
Liquid level, on the sea bed model, the liquid level of the liquid level is contacted with the oscillating plate；
Sensor, set on the edge that the soil layer connects with the liquid level, the sensor acquiring pressure in real time
Data.
2. the wave force simulating device in arm-type geotechnical centrifuge according to claim 1, which is characterized in that
The soil layer includes fine sand layer, farinose argillic horizon, silt clay layer and topsoil successively from bottom to up.
3. the wave force simulating device in arm-type geotechnical centrifuge according to claim 2, which is characterized in that when into traveling wave
During unrestrained power simulated experiment, the soil layer is equipped with a slope surface, which extends from the fine sand layer to the topsoil.
4. the wave force simulating device in arm-type geotechnical centrifuge according to claim 3, which is characterized in that the slope surface
Slope ratio ranging from 1:2-1: 3.
5. the wave force simulating device in arm-type geotechnical centrifuge according to claim 1, which is characterized in that the power
Mechanism includes
Motor is fixed on the case lid, and the case lid is equipped with through-hole；
Drive link, upper part are articulated with the arbor of the motor, and its underpart is articulated with the one of the oscillating plate across the through-hole
Side；
Connector, upper part are fixed on the case lid, and its underpart is articulated with the center of the oscillating plate.
6. the wave force simulating device in arm-type geotechnical centrifuge according to claim 5, which is characterized in that the motor
It is hinged with the drive link by an articulation piece；The oscillating plate is hinged with the drive link by an articulation piece；The connection
Part is hinged with the oscillating plate by an articulation piece.
7. the wave force simulating device in arm-type geotechnical centrifuge according to claim 1, which is characterized in that the liquid
The liquid level of layer is flushed with the oscillating plate horizontal center line.
8. the wave force simulating device in arm-type geotechnical centrifuge according to claim 1, which is characterized in that further include number
According to acquisition analysis system, to acquire and analyze the pressure data that the sensor is acquired.
9. the wave force simulating device in arm-type geotechnical centrifuge according to claim 1, which is characterized in that the sensing
Device includes ventage piezometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810131002.2A CN108168841A (en) | 2018-02-09 | 2018-02-09 | A kind of wave force simulating device in arm-type geotechnical centrifuge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810131002.2A CN108168841A (en) | 2018-02-09 | 2018-02-09 | A kind of wave force simulating device in arm-type geotechnical centrifuge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760541A (en) * | 2018-06-27 | 2018-11-06 | 中国海洋大学 | A kind of soil body dynamic test device |
| CN111967082A (en) * | 2020-08-21 | 2020-11-20 | 中国海洋大学 | Simulation analysis method for wave action on structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111967082A (en) * | 2020-08-21 | 2020-11-20 | 中国海洋大学 | Simulation analysis method for wave action on structure |
| CN111967082B (en) * | 2020-08-21 | 2023-12-26 | 中国海洋大学 | Simulation analysis method for action of waves on structure |
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