CN107607284A - A kind of offshore earthquake environmental wind tunnel analogue means - Google Patents

A kind of offshore earthquake environmental wind tunnel analogue means Download PDF

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Publication number
CN107607284A
CN107607284A CN201711091384.2A CN201711091384A CN107607284A CN 107607284 A CN107607284 A CN 107607284A CN 201711091384 A CN201711091384 A CN 201711091384A CN 107607284 A CN107607284 A CN 107607284A
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CN
China
Prior art keywords
test
wind tunnel
layer
offshore earthquake
offshore
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CN201711091384.2A
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Chinese (zh)
Inventor
王旭
李华强
陈增顺
周霄
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重庆交通大学
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Priority to CN201711091384.2A priority Critical patent/CN107607284A/en
Publication of CN107607284A publication Critical patent/CN107607284A/en

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Abstract

The invention discloses a kind of offshore earthquake environmental wind tunnel analogue means, applies in environmental wind tunnel analogue means field, including the wind-force segment occurred interconnected and the test section for placing test model;Test section is divided into headroom layer, sea water layer and ooze layer from top to bottom;Headroom layer connects with wind-force segment occurred;Sea water layer is provided with wave generator in test section entrance side-walls;Ooze layer bottom is provided with the vibrations generator being connected with test model.Mainly solve to lack currently for the wind tunnel experiment device of environment can simulate offshore earthquake and its along with stormy waves environment wind tunnel device, be currently limited to the numerical simulation analysis based on classical assumption.Analog study offshore earthquake of the present invention and its along with influence of the stormy waves ambient conditions to offshore drilling platform, to propose rational anti-offshore earthquake design, security of the offshore drilling platform at sea in seismic environment is improved, it has great practical significance and theoretical research value.

Description

A kind of offshore earthquake environmental wind tunnel analogue means

Technical field

The invention belongs to environmental wind tunnel analogue means field, and in particular to a kind of offshore earthquake environmental wind tunnel analogue means.

Background technology

With the in-depth that the mankind utilize to petrol resources exploitation, oil-gas exploration and development is transferred to ocean from land.Therefore, drilling well Engineer operation must also be carried out in the vast oceans.When at sea carrying out oil/gas drilling construction, hundreds of tons of heavy rigs will have Enough supports and the space of placement, while also to there is drilling implementer's life to occupy residence, offshore drilling platformses are just carried on a shoulder pole This important task is shouldered.Changeable due to sea climate, marine the stormy waves even invasion and attack of earthquake destroy, offshore drilling platform it is steady Qualitative and security becomes more important.

Wind tunnel experiment device currently for environment is mostly for hydromechanical research in aircraft or aeronautical field, is lacked Can simulate offshore earthquake and its along with stormy waves environment wind tunnel device.It is currently limited to the Numerical-Mode based on classical assumption Intend analysis so that the reliability and accuracy of method for numerical simulation need to be discussed, while also limit method for numerical simulation Development.

Therefore, it is necessary to work out a kind of offshore earthquake environmental wind tunnel analogue means, propose that rational anti-offshore earthquake is set Meter, security of the offshore drilling platform at sea in seismic environment is improved, it has great practical significance and theoretical research valency Value.

The content of the invention

In view of this, it is an object of the invention to provide a kind of offshore earthquake environmental wind tunnel analogue means, with analog study Offshore earthquake and its along with influence of the stormy waves environment to offshore drilling platform.

To reach above-mentioned purpose, the present invention provides following technical scheme:

A kind of offshore earthquake environmental wind tunnel analogue means, including the wind-force segment occurred interconnected and placement test model Test section, the wind-force segment occurred is interior to be provided with blower fan;The test section is divided into headroom layer, sea water layer and ooze layer from top to bottom; The headroom layer connects with wind-force segment occurred;The sea water layer is provided with wave generator in test section entrance side-walls;The sea Mud layer bottom is provided with the vibrations generator being connected with test model.

Preferably, the vibrations generator includes transmission platform, the retracting cylinder of base and setting therebetween;The transmission platform and examination Test the connection of model lower end;The base is fixedly installed on test section bottom;The retracting cylinder has six, each retracting cylinder upper and lower two End is connected by universal coupling with transmission platform and base respectively.

Preferably, the retracting cylinder is any one in electric cylinder, oil cylinder or cylinder.

Preferably, the transmission platform is connected with the side surrounding of base by rubber bellows seal.

Preferably, the wave generator includes making wave plate and the crank rocker machine that it can be driven to make periodicity open and close movement Structure, the crank and rocker mechanism are driven by servomotor.

Preferably, the wave generator includes sleeve, piston and can make periodicity push-and-pull fortune in sleeve with piston Dynamic crank and rocker mechanism, the crank and rocker mechanism are driven by servomotor.

Preferably, in addition to the diffuser, stable section and the contraction section that are sequentially arranged between wind-force segment occurred and test section; The diffuser internal diameter is gradually extended to identical with stable section internal diameter along air intake direction;The contraction section internal diameter along air intake direction by It is tapered as low as identical with test section internal diameter.

Preferably, the test section entrance is provided with deflector, and the blade of the deflector is in elongated diamond shaped.

Preferably, the wave generator at least one, and when there is two or more, multiple wave generators are set side by side Put and move synchronous.

Preferably, the blower fan at least one, and when there is two or more, multiple blower fans are set up in parallel and independently It is controlled.

The beneficial effects of the present invention are:

1st, the achievable analog study offshore earthquake of the present invention and its along with stormy waves ambient conditions to offshore drilling platform Influence.

2nd, the motion that the vibrations generator that the present invention uses can drive transmission platform to do six degree of freedom direction, can more full simulation Seismic wave, such as compressional wave, shear wave, face ripple, make present apparatus simulation earthquake conditions truer.

3rd, the wave generator that the present invention uses coordinates wave-shape board or piston rod to do and periodically disturb using crank and rocker mechanism It is dynamic, make the generation of wave simply effective, and coordinate wind-force segment occurred, when occurring simulated sea bottom earthquake, along with stormy waves ring The situation in border is truer.

4th, headroom layer, sea water layer and the ooze layer that the present invention uses, can more really simulate offshore drilling platform and be in Ambient environmental conditions during working condition.

5th, diffuser, stable section and the mixing contraction section that the present invention uses can make air-flow and wind speed more stable.

Brief description of the drawings

In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out Explanation:

Fig. 1 is the overall structure diagram of embodiment one;

Fig. 2 is the a-quadrant close-up schematic view of embodiment one;

Fig. 3 is the B area close-up schematic view of embodiment one;

Fig. 4 is the overall structure diagram of embodiment two;

Fig. 5 is the C regions close-up schematic view of embodiment two.

Marked in accompanying drawing as follows:Wind-force segment occurred 1, blower fan 11, test section 2, headroom layer 21, sea water layer 22, ooze layer 23, Wave generator 24, make wave plate 241, crank and rocker mechanism I242, sleeve 243, piston 244, crank and rocker mechanism II245, shake Dynamic generator 25, transmission platform 251, base 252, retracting cylinder 253, universal coupling 254, rubber bellows 26, diffuser 3, stably Section 4 and contraction section 5, deflector 6, test model 10.

Embodiment

Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.

Embodiment one

Such as Fig. 1~3, a kind of offshore earthquake environmental wind tunnel analogue means, including the wind-force segment occurred 1 interconnected and test Section 2, the wind-force segment occurred 1 is interior to be provided with blower fan 11;The test section 2 is divided into headroom layer 21, sea water layer 22 and sea from top to bottom Mud layer 23;The headroom layer 21 connects with wind-force segment occurred 1;The sea water layer 22 is sent out in test section entrance side-walls provided with wave Raw device 24;The bottom of ooze layer 23 is provided with the vibrations generator 25 being connected with test model 10.Wherein sea water layer and ooze layer Seawater and ooze original sample are derived from, may also be the water sample and soil sample of artificial proportioning synthesis certainly.

In use, the bottom of test model 10 of shape approximation offshore drilling platform is inserted in the middle part of the ooze layer, and with shake Dynamic generator 25 connects, and spills sea water layer upper surface at the top of test model, is placed in headroom layer, with this real simulation offshore drilling The work use state of platform.Then vibrations generator 25 is opened, simulated sea bottom earthquake inserts in ooze layer situation to test model Under vibrations and invasion;Blower fan 11 and wave generator 24 are opened, is produced respectively and is blowed to the air-flow of test model and pour into experiment The wave of model, when being occurred with this simulated sea bottom earthquake, along with stormy waves environment.

Vibrations generator 25 includes transmission platform 251, the retracting cylinder of base 252 and setting therebetween used by the present embodiment 253;The transmission platform 251 is connected with the lower end of test model 10;The base 252 is fixedly installed on the bottom of test section 2;It is described to stretch Contracting cylinder 253 has six, and each retracting cylinder upper and lower ends are connected by universal coupling 254 with transmission platform 251 and base 252 respectively. The design can make vibrations generator 25 drive transmission platform 251 to do the motion in six degree of freedom direction, can more completely simulate seismic wave, Such as compressional wave, shear wave, face ripple, make transmission platform by seismic wave transmission and act on the experiment mould being filled with to bottom by the covering of ooze layer Type, make more real simulated sea bottom earthquake conditions.Certainly, can be according to use demand, the Access Control mould on vibrations generator Block, and interacted with external control system connection, realize the regulation to earthquake intensity and frequency.

Retracting cylinder 253 can be any one in electric cylinder, oil cylinder or cylinder used by the present embodiment, as long as can realize certainly It is dynamic flexible.

Transmission platform 251 and the side surrounding of base 252 are tightly connected by rubber bellows 26 used by the present embodiment. Because transmission platform 251 does irregular movement in the case where vibrations generator 25 simulates earthquake conditions, while need to avoid ooze layer to vibrations The invasion of generator 25, transmission platform 251 is connected with the side surrounding of base 252 using rubber bellows 26, ensureing to seal While type is good, because it has certain allowing property of redundancy, it is not to disturb the random motion of transmission platform 251 again.

Wave generator 24 includes making wave plate 241 and it can be driven to make periodicity open and close movement used by the present embodiment Crank and rocker mechanism I242, the crank and rocker mechanism I are driven by servomotor.Wherein crank and rocker mechanism I includes cutting with scissors each other The first drive link, the second drive link, the 3rd drive link and the axis of guide, the axis of guide connect is vertically arranged, servomotor driving first Drive link does circumferential reciprocating motion, so as to drive the wave plate of making being movably hinged respectively with the axis of guide and the 3rd drive link to do periodically Open and close movement.As long as periodic disturbance can be done to water, you can form wave.Therefore, the crank and rocker mechanism that the present embodiment uses It is practicable with reference to wave plate is made.Certainly, can according to use demand, the Access Control module on servomotor, and with outside Control system connection interaction, realizes the regulation to producing wave size and frequency.

Offshore earthquake environmental wind tunnel analogue means described in the present embodiment, in addition to be sequentially arranged in wind-force segment occurred and test Diffuser 3, stable section 4 and contraction section 5 between section;The internal diameter of diffuser 3 is gradually extended to and stable section 4 along air intake direction Internal diameter is identical;The internal diameter of contraction section 5 is gradually reduced to identical with the internal diameter of test section 2 along air intake direction.Diffuser 3 can make blower fan Adopt into high speed and high pressure air-flow be suitably depressured, stable section 4 can ensure the steady air current into test section 2, make air quantity wind speed Stability is more preferable.Contraction section 5 can make air-flow suitably integrate pressurization, make the more powerful concentration of sea wind of simulation.

Test section entrance is provided with deflector 6 used by the present embodiment, and the blade of the deflector is in elongated diamond shaped.Lead Flowing plate can make experimenter select air-flow/sea wind to act on the direction of experimental model, and be arranged to elongated diamond shaped, and windage is more Small, water conservancy diversion effect is more preferable.

Used by the present embodiment wave generator at least one, and when there is two or more, multiple wave generators It is set up in parallel and moves synchronously, it can produces more powerful wave, and Modulatory character is also more preferable.

Used by the present embodiment blower fan at least one, and when there is two or more, multiple blower fans be set up in parallel and point It is not the independently-controlled, in blower fan wind-force itself, in the case that power is fixed in other words, the quantity of blower fan can be opened by selection, is come Regulate and control the size of air-flow/sea wind.

Embodiment two

Such as Fig. 4, the difference with embodiment one is, wave generator 24 includes sleeve 243, lived used by the present embodiment Plug 244 and the crank and rocker mechanism II245 that periodicity push-and-pull campaign can be made in sleeve with piston, the crank and rocker mechanism II is driven by servomotor.Wherein crank and rocker mechanism II includes the first drive link mutually hinged, the second drive link and guiding Axle, the axis of guide are vertically arranged, servomotor drive the first drive link do circumferential reciprocating motion, so as to drive the second drive link and with Its piston being movably hinged does periodicity push-and-pull campaign in vertically disposed sleeve.As long as periodic disturbance can be done to water, you can Form wave.Therefore, it is practicable that the crank and rocker mechanism that the present embodiment uses, which combines and makes wave plate,.

Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be Various changes are made to it in form and in details, without departing from claims of the present invention limited range.

Claims (10)

1. a kind of offshore earthquake environmental wind tunnel analogue means, including the wind-force segment occurred and test section interconnected, its feature exist In:Blower fan is provided with the wind-force segment occurred;The test section is divided into headroom layer, sea water layer and ooze layer from top to bottom;It is described Headroom layer connects with wind-force segment occurred;The sea water layer is provided with wave generator in test section entrance side-walls;The ooze layer Bottom is provided with the vibrations generator being connected with test model.
2. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:The vibrations generator bag Include transmission platform, the retracting cylinder of base and setting therebetween;The transmission platform is connected with test model lower end;The base fixed setting In test section bottom;The retracting cylinder has six, and each retracting cylinder upper and lower ends pass through universal coupling and transmission platform and bottom respectively Seat connection.
3. offshore earthquake environmental wind tunnel analogue means according to claim 2, it is characterised in that:The retracting cylinder is electronic Any one in cylinder, oil cylinder or cylinder.
4. offshore earthquake environmental wind tunnel analogue means according to claim 2, it is characterised in that:The transmission platform and base Side surrounding connected by rubber bellows seal.
5. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:The wave generator bag The crank and rocker mechanism I for making wave plate and it being driven to make periodicity open and close movement is included, the crank and rocker mechanism I is by servomotor Driving.
6. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:The wave generator bag Include sleeve, piston and the crank and rocker mechanism II that periodicity push-and-pull campaign can be made in sleeve with piston, the crank rocker Mechanism II is driven by servomotor.
7. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:Also include being sequentially arranged Diffuser, stable section and contraction section between wind-force segment occurred and test section;The diffuser internal diameter gradually expands along air intake direction It is big extremely identical with stable section internal diameter;The contraction section internal diameter is gradually reduced to identical with test section internal diameter along air intake direction.
8. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:The test section entrance is set There is deflector, the blade of the deflector is in elongated diamond shaped.
9. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:The wave generator is extremely Rare one, and when there is two or more, multiple wave generators are set up in parallel and moved synchronous.
10. offshore earthquake environmental wind tunnel analogue means according to claim 1, it is characterised in that:The blower fan is at least One, and when there is two or more, multiple blower fans are set up in parallel and independently controlled.
CN201711091384.2A 2017-11-08 2017-11-08 A kind of offshore earthquake environmental wind tunnel analogue means CN107607284A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109377841A (en) * 2018-11-21 2019-02-22 大连理工大学 Using the floating-type offshore wind power unit experimental provision and its method of stormy waves equivalent device
CN109406087A (en) * 2018-11-21 2019-03-01 大连理工大学 Floating-type offshore wind power unit mixed model experimental provision and the method being placed in wind-tunnel

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JPH1183666A (en) * 1997-09-12 1999-03-26 Sanden Shoji Kk Underwater/in-soil vibrating table apparatus
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Publication number Priority date Publication date Assignee Title
JPH1183666A (en) * 1997-09-12 1999-03-26 Sanden Shoji Kk Underwater/in-soil vibrating table apparatus
CN202614496U (en) * 2012-04-01 2012-12-19 中国船舶重工集团公司第七○二研究所 Combined rocking-plate type multidirectional wave generator
CN103278304A (en) * 2013-06-17 2013-09-04 清华大学 Maritime work vibrating table device
CN103323210A (en) * 2013-06-18 2013-09-25 清华大学 Large-scale maritime work wind tunnel wave channel device
CN204575285U (en) * 2015-05-05 2015-08-19 天津大学 A kind of underwater seismic simulating vibration table array
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109377841A (en) * 2018-11-21 2019-02-22 大连理工大学 Using the floating-type offshore wind power unit experimental provision and its method of stormy waves equivalent device
CN109406087A (en) * 2018-11-21 2019-03-01 大连理工大学 Floating-type offshore wind power unit mixed model experimental provision and the method being placed in wind-tunnel

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Application publication date: 20180119