CN110455478A - A kind of dam body shock test simulator that vibration frequency subregion is controllable - Google Patents
A kind of dam body shock test simulator that vibration frequency subregion is controllable Download PDFInfo
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- CN110455478A CN110455478A CN201910713564.2A CN201910713564A CN110455478A CN 110455478 A CN110455478 A CN 110455478A CN 201910713564 A CN201910713564 A CN 201910713564A CN 110455478 A CN110455478 A CN 110455478A
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 230000035939 shock Effects 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 11
- 238000013480 data collection Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 229920002521 macromolecule Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000004945 silicone rubber Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 20
- 238000013316 zoning Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000005469 synchrotron radiation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
Abstract
The invention belongs to earthquake engineering analog study technical fields, disclose a kind of dam body shock test simulator that vibration frequency subregion is controllable, mainly include data collection system, shake table module, ground case, ground, dam body；Wherein shake table module includes high-frequency vibrating table and low-frequency vibration table；Dam body receives the vibration of the low frequency that conduction comes and high frequency synthesis；Be fixedly provided with the water tank being connected to ground case flexible sealing on low-frequency vibration table, the region segmentation after connection is upstream water area in water tank side at upstream and downstream water area by dam body, in upper water receive low-frequency vibration and act on dam body；Damping Boundary body is provided between ground case and ground.Apparatus of the present invention are zoning simulated by height frequency vibration, so that the simulation of dam body shock test is more in line with the actual use situation greatly than ruler high dam, obtained test data tends to be reasonable, accurate, while reducing experimentation cost.
Description
Technical field
The invention belongs to earthquake engineering analog study technical fields, are related to a kind of dam body antidetonation that vibration frequency subregion is controllable
Experiment simulator.
Background technique
In recent years, it is the rapid development for adapting to China's hydropower, builds up in succession or start to have built large quantities of high
Dam water area.At present before the height of dam ranking of the whole world in 100 dams, China accounts for 20, wherein be more than that 200m has 14, dam
It is high also not rarely seen in China more than 300m water resources dam.Due to running through a plurality of earthquake zone, the antidetonation of dam in China's geographical configuration
Performance design and engineering undertake the construction of in be very important performance assessment criteria, it be related to dam safety and downstream city and
The safety of life and property of population, especially high dam engineering.Therefore, the earthquake motion Study on dynamic response pair of high dam dam body and ground
It is significant in high dam engineering safety.
Shock test simulator is the most effective facility for carrying out earthquake engineering analog study, is generally comprised: Quintic system is intended
Power, earthquake simulation shaking table, in-situ test etc..For the especially needed shock test simulator of high dam design of dam body.It will be high
Dam dam body is placed in the enterprising action edge response simulation test of shake table, can pass through pair of collected test data and gross data
Than verifying and the anti-seismic performance for checking dam provide a favorable security for high dam engineering design and operational safety.
There are following prominent questions when currently, shock test simulator is applied to high dam simulation test:
1, the simulation of flowing pressure is most important to high dam shaketalle test, and influence degree is up to 10% or more.It is practical
In earthquake, the water body of water area will receive the influence of earthquake vibration, and simple Lentic environment cannot completely reflect seismic process
In flowing pressure variation phenomenon；However, if water area is carried out reduced scale, establish scaled model, and establish shake table it
On, it is necessary to the size of shake table is bigger, and lifting capacity is stronger, and vibration frequency range is wider, this will restrict again simulate in turn
The reduced scale of test；
2, for high dam, there is larger contradiction in loading frequency and geometric dimension and load-carrying.Earthquake motion may influence
It to the tenth rank self-vibration dynamic frequency of dam, is simulated according to large vibration table, then size can amplify, and simulation precision is promoted, but high
Frequency can not load；It is simulated according to small vibrating platform, then can carry out high frequency load, but geometric dimension is smaller, simulation precision is limited；
3, the frequency of water area water body is generally in 1~2Hz, and in dam body shock test simulator, water area is adopted
It is loaded with high frequency identical with dam body, can undoubtedly greatly improve simulation expense, and simulated effect and have no larger raising.
In order to it is reasonable, efficient, economically for greatly than under the conditions of ruler dam body design carry out shock test simulation, be badly in need of
High frequency can be loaded to dam body by developing one kind, while load low frequency in water area, actually use feelings with simulation reported as precisely as possible
The shock test simulator of condition, to solve technology bottle existing for the shock test simulation test greatly than ruler high dam test model
Neck.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of simulations of dam body shock test that vibration frequency subregion is controllable to fill
It sets.The purpose is to realize the vibration frequency subregion controllable simulation greatly than ruler seismic fortification for high dam simulation test, shock test simulation is improved
Accuracy, reasonability, economy.
The present invention is as follows using technical solution:
A kind of dam body shock test simulator that vibration frequency subregion is controllable, including data collection system, shake table mould
Block, the ground case being installed in shake table module, the ground being fixedly arranged in ground case, the dam body being fixedly arranged on ground；The vibration
Move the high-frequency vibrating table that platform module includes low-frequency vibration table and is rigidly attached on the low-frequency vibration table；The ground case is fixed
On the high-frequency vibrating table, the dam body extends to the opposing sidewalls of ground in the ground case, by the sky in the ground
Between be separated out upstream water area and downstream water region two parts；Water tank, the water are fixedly provided on the low-frequency vibration table
Case separately and is set side by side with the ground case, respectively corresponds otch in the adjacent side of the water tank and ground case,
And the water tank and ground case are connected by sealing and connecting device at the notch, by the upstream water area of the ground case
It is connected to integrally with the water tank；Upper water is loaded in the upstream water area.
It is installed with Damping Boundary body between the ground case and the ground, the radiation damping for simulating the ground is imitated
It answers.
The Damping Boundary body uses macromolecule silicone rubber material.
The sealing and connecting device is flexible seal connecting mechanism.
The low downstream water of the relatively described upper water water level is loaded in the downstream water region.
The notch is consistent with the ground shape, and the notch upper surface is not less than the foundation surface.
The data collection system includes sensor, data collecting instrument, the data biography of the sensor and data collecting instrument
Defeated is cable transmission and/or wireless transmission.
The sensor is the pore pressure gauge and/or earth pressure gauge for being laid in the ground part, and is laid in
One of the acceleration transducer of the dam body part, velocity sensor, displacement sensor, stress-strain sensor or number
Kind.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) fixed water tank on heretofore described low-frequency vibration table, on high-frequency vibrating table fixed ground case scheme, phase
It is tested compared with existing dam earthquake simulating vibration table, creatively provides low-frequency vibration excitation for water area, realize
To the analogue technique of the flowing pressure variation phenomenon during earthquake.This mode, which can solve, to be tried than ruler high dam dam body antidetonation greatly
Test the problem of flowing pressure variation that simulator Lentic environment cannot completely reflect in vibration processes.
(2) on heretofore described low-frequency vibration table fixed high-frequency vibrating table scheme, creatively by the big row of low frequency
Journey shake table is combined with the characteristic of the small stroke vibration platform of high frequency, realizes the skill of height-low frequency of dam body and ground while load
Art can solve in practical application and nor affect on simulation essence than ruler high dam dam body shock test simulator load high-frequency vibration greatly
The problem of spending.
(3) the controllable dam body shock test simulator of vibration frequency subregion of the present invention, can be to dam body antidetonation
Experiment simulator carries out the vibrational excitation that different zones apply different frequency, can load low frequency to water body, load to dam body
High and low frequency, without to integrally loading high frequency than ruler high dam dam body shock test simulator greatly, thus reduce test at
This.
Detailed description of the invention
Fig. 1 is the three-dimensional shaft side structure schematic diagram of the controllable dam body shock test simulator of vibration frequency subregion of the present invention
Fig. 2 is the overlooking structure diagram of the controllable dam body shock test simulator of vibration frequency subregion of the present invention
Fig. 3 is the structural schematic diagram of A-A section in Fig. 2
Fig. 4 is the structural schematic diagram of B-B section in Fig. 3
Fig. 5 is the structural schematic diagram of C-C section in Fig. 3
Wherein: 1-5-ground of high-frequency vibrating table 2-low-frequency vibration table, 3-ground case 4-Damping Boundary body 6-
9-upstream of dam body 7-sealing and connecting device, 8-water tank, 10-downstream water of water area region, 11-notch 12-passes
13-data collecting instrument of sensor
Specific embodiment
The present invention relates to a kind of dam body shock test simulators that vibration frequency subregion is controllable, are mainly used for higher than ruler greatly
Dam shock test simulator, with solve greatly than simulated environment is unreasonable in ruler high dam design simulation test, simulation precision not enough,
The high technical problem of simulated cost.
With reference to the accompanying drawing 1~5, technical solution of the present invention is further explained with specific embodiment:
A kind of dam body shock test simulator that vibration frequency subregion is controllable, including data collection system, shake table mould
Block, the ground case 3 being installed in shake table module, the ground 5 being fixedly arranged in ground case 3, the dam body 6 being fixedly arranged on ground 5；Vibration
Move the high-frequency vibrating table 1 that platform module includes low-frequency vibration table 2 and is rigidly attached on low-frequency vibration table 2；Ground case 3 is installed in height
On frequency vibration platform 1, dam body 6 extends to the opposing sidewalls of ground 5 in ground case 3, and the space in ground 5 is separated out upstream water body
10 two parts of region 9 and downstream water region；Be fixedly provided with water tank 8 on low-frequency vibration table 2, water tank 8 and ground case 3 separately and
It is set side by side, respectively corresponds otch 11 in the adjacent side of water tank 8 and ground case 3, and connected at notch 11 by sealing
Connection device 7 connects water tank 8 and ground case 3, and the upstream water area 9 of ground case 3 is connected to integrally with water tank 8；
Upper water is loaded in upstream water area 9.
Damping Boundary body 4 is installed between ground case 3 and ground 5, the synchrotron radiation effect for ground foundation simulation 5.
Damping Boundary body 4 uses macromolecule silicone rubber material.
Sealing and connecting device 7 is flexible seal connecting mechanism.
The low downstream water of upstream relative water water level is loaded in downstream water region 10.
Notch 11 is consistent with 5 shape of ground, and 11 upper surface of notch is not less than 5 surface of ground.
Data collection system includes sensor 12, data collecting instrument 13, the data biography of sensor 12 and data collecting instrument 13
Defeated is cable transmission and/or wireless transmission.
Sensor 12 is the pore pressure gauge and/or earth pressure gauge for being laid in 5 part of ground, and is laid in dam body 6
Acceleration transducer, velocity sensor, displacement sensor, one of the stress-strain sensor or several of part.
With reference to the accompanying drawing 1~5, more specifically explanation technical solution of the present invention:
High-frequency vibrating table 1 and low-frequency vibration table 2 should all include the exciting forcer of vibration table and offer excitation.At this
Technical field, exciting forcer generally comprise oil sources energy supplying system, hydraulic cylinder loading system, data control system.This implementation
Example uses conventional techniques: oil sources energy supplying system provides the energy for the reciprocating motion of hydraulic cylinder, and Hydraulic Cylinder shake table is simultaneously
Subjects thereon are driven to vibrate together；Data control system can Oscillation Amplitude to shake table, frequency be monitored, and root
Real-time iterative amendment is carried out according to monitoring data, to ensure that the vibration time-histories of shake table meets expection, while guaranteeing the fortune of shake table
Row safety.It include the exciting forcer of two rate-adaptive pacemakers in the present embodiment, corresponding is high-frequency vibrating table 1 and low-frequency vibration
Platform 2 provides excitation.High-frequency vibrating table 1 receives the small stroke excitation of high frequency, and low-frequency vibration table 2 receives the big stroke vibration excitation of low frequency.
In the present embodiment, 2 mesa dimensions of low-frequency vibration table are 20m × 15m, receive 25Hz low-frequency vibration input below；
The mesa dimensions of high-frequency vibrating table 1 are 6m × 10m, receive the high-frequency vibration input of 25~50Hz or so；High-frequency vibrating table 1 and low
It is bolted between frequency vibration platform 2.Fixed ground case 3 is having a size of 6m × 7.5m × 10m, ground on high-frequency vibrating table 1
Ground 5 and dam body 6 are installed in case 3, the height of dam 300m of dam body 6 is tested according to 1:80 than ruler, the height of dam of model dam body 6
For 3.75m, dam soil depth, upstream and downstream range are taken as 1 times of height of dam, and left and right banks dam soil range is taken as half times of dam
Height, final ground case 3 and 6 total weight 800t of ground 5 and dam body thereon.10th rank self-vibration dynamic frequency rate of dam body 6 is about
5.0Hz is calculated by gravity similarity criterion, and to simulate the dynamic response of the order frequency, high-frequency vibrating table 1 need to receive the vibration of 45Hz
Dynamic frequency input；High-frequency vibrating table 1 in the present embodiment device can meet the frequency requirement of test；It needs to be supplied to upstream in test
The frequency of 9 water body of water area is about 4.47Hz~17.9Hz, and the working frequency of the low-frequency vibration table 2 in the present embodiment device can
Meet the frequency requirement of test；When test, low-frequency vibration table 2 inputs 25Hz (earthquake) vibration wave below, is transferred to high frequency vibrating
Dynamic platform 1, high-frequency vibrating table 1 separately provide the input of (earthquake) vibration wave higher than 25Hz, and (earthquake) being passed to low-frequency vibration table 2
Vibration wave synthetic input is to 5 bottom of ground；Ground 5 and dam body 6 thereon and downstream water 10 synthesized after (earthquake) vibration
Wave input, the influence although wherein downstream water 10 is influenced by high-frequency vibration, since its depth of water is smaller, to bulk testing
It is limited；Water area 9 water body in upstream is not influenced then by high frequency (earthquake) wave input of high-frequency vibrating table 1, only by low-frequency vibration
Low frequency (earthquake) wave input action of platform 2, so that it is zoning simulated to realize high and low frequency.This simulation is with close to actual conditions.
Specific to the present embodiment, the size for containing the water tank 8 of upper water is 6m × 7.5m × 6m, water tank 8 and its water body
Total weight about 300t.
In the present embodiment, Damping Boundary body 4 uses macromolecule silicone rubber material, is installed in ground case 3 and 5 contact surface of ground
Between.
In the present embodiment, otch 11 is distinguished on ground case 3, water tank 8.Notch 11 is opened in ground case 3, the water placed parallel
Consistent with the shape of ground in the adjacent side of 8 face of case, 11 upper surface of notch is higher by 5 surface certain altitude (this implementation of ground
The distance that example is higher by ground 5 is the thickness of a water tank 8), in order that being increased as far as possible in the case where guaranteeing 5 safety of ground
The opening area of notch 11 simulates truth, while facilitating the installation of sealing and connecting device 7.Sealing and connecting device 7 will guarantee
Across on ground case 3, water tank 8 on the section of notch 11 on all cross sections, and by two stabilizer blades of sealing and connecting device 7
It is embedded to ground case 3 respectively, in 8 entity of water tank, to guarantee to seal.
Sealing and connecting device 7 is flexible seal connecting mechanism, can use such as sealing ring, rubber parts elastic part, or
Component comprising elastic part.The present embodiment uses waterstop.
In the present embodiment, each monolith lays at least one sensor 12, these sensors 12 on the dam crest of dam body 6
It can be one of acceleration transducer, velocity sensor, displacement sensor or any combination；In the downstream dam facing of dam body 6
Lay stress-strain sensor in appropriate location；One of earth pressure gauge and interstitial hydraulic pressure meter are buried in 5 appropriate location of ground
Or combination；Data collecting instrument 13 is arranged according to 12 type matching of sensor.In this specific embodiment, sensor 12 and data acquisition
The data of instrument 13 are transmitted as wire transmission.
6 two sides waters of dam body progress high and low frequency is zoning simulated, the fine analog of Dynamic response to earthquake is not only realized,
And the technical requirements for reducing high-frequency vibrating table size and load-carrying to a certain extent etc., bigger compare ruler to can realize
Model test.
In the present embodiment, realized by way of high-frequency vibrating table 1 is installed on low-frequency vibration table 2 to high-frequency vibrating table 1
Upper subjects load high and low frequency excitation simultaneously；The subjects being directly installed on low-frequency vibration table are remained simultaneously
Low-frequency excitation is without applying high frequency pumping, and then the subregion for realizing vibration frequency is controllable.Wherein high and low frequency is all opposite
For, for different subjects, frequency it is high and low define it is different, with specific shake table size, load-carrying and its
The technical requirements limitation of corresponding driving frequency is related.
In practical application, different frequency shake table is laid with multiple combinations form, can be overlapped laying, can also be independent
Lay, etc.；If necessary, laying can also be combined in a variety of forms using the shake table of two or more frequencies, according to specific examination
Depending on testing.Within the change that the multiple combinations of shake table module lay form all belongs to the scope of protection of the present invention.
The above are the descriptions carried out in conjunction with attached drawing to the preferred embodiment of the present invention.But the invention is not limited to above-mentioned
Specific embodiment, the above mentioned embodiment is only schematical, is not restrictive.The common skill of this field
Art personnel under the inspiration of the present invention, in the case where not departing from present inventive concept and scope of the claimed protection, may be used also
By make it is many in the form of structures and methods change.All simple transformations for passing through structure and components in the prior art, with
Reach the purpose of the present invention, all belongs to the scope of protection of the present invention.
Claims (8)
1. a kind of dam body shock test simulator that vibration frequency subregion is controllable, including data collection system, shake table module,
The ground case (3) that is installed in shake table module, the ground (5) being fixedly arranged in ground case (3), the dam being fixedly arranged on ground (5)
Body (6)；
It is characterized by:
The shake table module includes low-frequency vibration table (2) and the high-frequency vibration that is rigidly attached on the low-frequency vibration table (2)
Platform (1)；The ground case (3) is installed on the high-frequency vibrating table (1), and the dam body (6) extends in the ground case (3)
Space in the ground (5) is separated out upstream water area (9) and downstream water region by the opposing sidewalls of ground (5)
(10) two parts；
It is fixedly provided with water tank (8) on the low-frequency vibration table (2), the water tank (8) and the ground case (3) are separately and side by side
Setting, respectively corresponds otch (11) in the adjacent side of the water tank (8) and ground case (3), and in the notch (11)
Place connects the water tank (8) and ground case (3) by sealing and connecting device (7), by the upstream water area of the ground case (3)
(9) it is connected to integrally with the water tank (8)；
Upper water is loaded in the upstream water area (9).
2. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 1, feature exist
In: it is installed between the ground case (3) and the ground (5) Damping Boundary body (4), for simulating the spoke of the ground (5)
Penetrate damping effect.
3. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 2, feature exist
In: the Damping Boundary body (4) uses macromolecule silicone rubber material.
4. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 1, feature exist
In: the sealing and connecting device (7) is flexible seal connecting mechanism.
5. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 1, feature exist
In: the low downstream water of the relatively described upper water water level is loaded in the downstream water region (10).
6. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 1, feature exist
In: the notch (11) is consistent with the ground (5) shape, and the notch (11) upper surface is not less than the ground (5) table
Face.
7. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 1, feature exist
In: the data collection system include sensor (12), data collecting instrument (13), the sensor (12) and data collecting instrument
(13) data are transmitted as cable transmission and/or wireless transmission.
8. a kind of dam body shock test simulator that vibration frequency subregion is controllable according to claim 7, feature exist
In: the sensor (12) is the pore pressure gauge and/or earth pressure gauge for being laid in the ground (5) part, and is laid
In one of the acceleration transducer of the dam body (6) part, velocity sensor, displacement sensor, stress-strain sensor
Or it is several.
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Cited By (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199491A (en) * | 2021-12-15 | 2022-03-18 | 国家能源投资集团有限责任公司 | Earthquake-resistant stability test evaluation device, test evaluation method, electronic device, and storage medium |
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