CN106184662A - Noise high-speed floating acoustic experiment device in a kind of pond - Google Patents
Noise high-speed floating acoustic experiment device in a kind of pond Download PDFInfo
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- CN106184662A CN106184662A CN201610635870.5A CN201610635870A CN106184662A CN 106184662 A CN106184662 A CN 106184662A CN 201610635870 A CN201610635870 A CN 201610635870A CN 106184662 A CN106184662 A CN 106184662A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
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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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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The present invention relates to noise high-speed floating acoustic experiment device in a kind of pond, belong to submarine navigation device hydrodynamic noise and control technical field.This assay device includes test model, flexible cable, underwater sound measuring equipment, two fixed pulleys, vicarious speed meter, running block, fixed pulley group, guiding mechanism I, connector, weight I, weight II and damper mechanism；When weight II utilizes self gravitation to drop to damper mechanism, the acceleration that test model obtains under the effect of assembly pulley is much larger than the acceleration of weight II, and test model reaches to test required ascent rate；Then, the resistance of pilot system is overcome by the self gravitation of weight I, speed needed for making test model keep at the uniform velocity floats, until weight drops to contact with weight II, now test model emerges just by analyzing underwater sound measuring equipment and the data of test model internal data acquisition and recording instrument record, obtains the near field noise of test model and the characteristic of free far-field noise.
Description
Technical field
Present invention relates particularly to a kind of for testing uniform motion under submerged structure fast state time steady-state flow swash noise
Assay device, belongs to submarine navigation device hydrodynamic noise and controls technical field.
Background technology
Vibration, self noise and the radiated noise problem produced for fluid excitation when studying submarine navigation device motion, already
Proposing to carry out on lake or the most unpowered test of floating in sea, unpowered floating test platform is it can be avoided that ordinary test platform
The noise that dynamical system and propulsion system produce in process of the test.Patent CN201510398686.9 proposes a kind of low noise
The big depth underwater of the sound pitch speed of a ship or plane is unpowered floating test platform, but this test platform is applicable on lake or the big degree of depth such as sea
Unpowered test of floating is carried out in waters, and the test period is long, and cost is high, poor repeatability.At present, the towing done in test chamber pond
Test is difficult to avoid that the mechanical noise that towing system produces；The test carried out in water hole, owing to the operatic tunes is the least, the lower limit being suitable for
Frequency is the highest, it is difficult to meet engineering demand measured directly to noise.
Summary of the invention
For defect present in prior art, in it is an object of the invention to provide a kind of pond, noise high-speed floats
Acoustic experiment device, the precision instrument that this assay device is used is few, and low cost is simple to operate；This assay device is used to try
The cycle tested is short and reproducible.
It is an object of the invention to be achieved through the following technical solutions.
Noise high-speed floating acoustic experiment device in a kind of pond, described assay device includes test model, flexible cable, water
Sound measurement equipment, two fixed pulleys, vicarious speed meter, running block, fixed pulley group, guiding mechanism I, connector, weight I,
Weight II and damper mechanism；
The quality of described weight I is less than the quality of weight II；Described test model has data acquisition recorder, record
The self noise produced in test model floating-upward process；Described guiding mechanism I is made up of a horizon bar and two vertical rods, level
The two ends of bar are slidably matched with two vertical rods respectively and are mutually perpendicular to two vertical rods respectively, and horizon bar is in the effect of external force
The lower length direction along vertical rod slides；
Two vertical rods of guiding mechanism I are fixedly mounted on the ground that pond is other, and the movable pulley in running block is fixed
It is arranged on the horizon bar of guiding mechanism I；It is connected by flexible cable between weight I with weight II, and weight I passes through connector and leads
To the fixing connection of the horizon bar of mechanism I；Damper mechanism is installed on the ground and in weight I and the underface of weight II；Fixed pulley
Organize the height that hard-wired height is installed more than running block；Two fixed pulleys are arranged in same level, and install
The height highly installed more than fixed pulley group；One end of flexible cable is fixedly mounted on the top of running block, sequentially passes through movable pulley
After group, fixed pulley group and two fixed pulleys, the other end and the test model being placed in pond are fixing to be connected, and flexible cable alternately across
Movable pulley in running block and the fixed pulley in fixed pulley group；Vicarious speed meter is placed between the water surface and running block
Around flexible cable, measure and record the speed in test model floating-upward process；It is even that underwater sound measuring equipment is placed on test model in pond
In the region of speed motion, the underwater radiation noise that record test model produces, provide free far-field radiation noise magnitude and become in time
Frequency becomes spectrogram.
The depth of water in described pond is not less than 15m, and test model out to out is not more than 2m.
Preferably, the rubber-coated plate in the outside of weight I and weight II.
Preferably, being arranged on by test model inside streamlined submerged structure, streamlined submerged structure is fixing with flexible cable even
Connect.
Preferably, pond fixedly mounts guiding mechanism II, and test model is arranged in streamlined submerged structure
Portion；Guiding mechanism II is made up of the vertical rod of two vertical waters surface, and two vertical rods in guiding mechanism II are respectively with streamlined
Submerged structure contacts, and streamlined submerged structure is fixing with flexible cable to be connected.
Preferably, described flexible cable lays hydrophobic material.
Preferably, coated with viscoelastic layer on guiding mechanism I, suppresses it to vibrate.
Beneficial effect:
(1), in assay device of the present invention, mechanical equipment runs, therefore plant equipment noise is eliminated；Use
Vibration absorber declines the vibration of end generation and carries out efficient vibration damping weight, and is significantly dropped by the surface coated rubber slab of weight
The low airborne noise clashing into generation；Owing to the natural frequency of flexible cable is extremely low, thus system vibration is avoided to be delivered to test along flexible cable
Model, and in flexible cable, lay hydrophobic material, it is to avoid from water, take a large amount of water droplet during motion out of form water droplet noise at the water surface；Lead
Make movable pulley according to the path motion waiting regulation to mechanism I, it is to avoid the randomness of its motion, make the pulsation of movement velocity drop to
Low, on guiding mechanism I, coated with viscoelastic layer is to suppress it to vibrate；Test model is arranged in streamlined submerged structure, in reduction
Resistance during Fu；Guiding mechanism II and streamlined submerged structure can ensure that in floating-upward process, test model attitude is steady；.
By above-mentioned measure, the noise that in process of the test, system produces can be substantially reduced, provide relatively low background noise for test.
(2) assay device of the present invention is not less than the pond of 15m be applicable to the depth of water, meets test model and at the uniform velocity transports
The time of dynamic at least 1s, and the noise characteristic in full frequency band can be recorded；This assay device can be tested the speed of a ship or plane and be up to 15kn's
Propeller Model.
(3) precision instrument that assay device of the present invention is used is few, low cost, simple to operate, be prone to adjust；And
The test repeatability using this assay device to carry out is good, the cycle is short.
Accompanying drawing explanation
Fig. 1 is noise high-speed floating acoustic experiment device in the pond described in embodiment.
Wherein, 1-test model, 2-flexible cable, 3-underwater sound measuring equipment, 4-fixed pulley, 5-vicarious speed meter, 6-is dynamic sliding
Wheels, 7-fixed pulley group, 8-guiding mechanism I, 9-connector, 10-weight I, 11-weight II, 12-damper mechanism, 13-is streamlined
Submerged structure, 14-guiding mechanism II.
Detailed description of the invention
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
Embodiment 1
As it is shown in figure 1, noise high-speed floating acoustic experiment device in a kind of pond, described assay device includes testing mould
Type 1, flexible cable 2, underwater sound measuring equipment 3, two fixed pulleys 4, vicarious speed meter 5, running block 6, fixed pulley group 7, Guiding machines
Structure I 8, connector 9, weight I 10, weight II 11 and damper mechanism 12；
The quality of described weight I 10 is less than the quality of weight II 11, and the outside of weight I 10 and weight II 11 is rubber-coated
Plate；Hydrophobic material is laid in described flexible cable 2；Described test model 1 has data acquisition recorder, on record test model
Attitude, vibration and the self noise produced during Fu；Described guiding mechanism I 8 is made up of a horizon bar and two vertical rods, water
The two ends of flat bar are slidably matched with two vertical rods respectively and are mutually perpendicular to two vertical rods respectively, and horizon bar is at the work of external force
Slide with the lower length direction along vertical rod, coated with viscoelastic layer on guiding mechanism I 8；The depth of water in pond is more than 15m, test
The full-size of model 1 is not more than 2m.
Two vertical rods of guiding mechanism I 8 are fixedly mounted on the ground that pond is other, and the movable pulley in running block 6 is solid
Dingan County is contained on the horizon bar of guiding mechanism I 8；It is connected by flexible cable 2 between weight I 10 with weight II 11, and weight I 10 passes through
Connector 9 is fixing with the horizon bar of guiding mechanism I 8 to be connected；Damper mechanism 12 is installed on the ground and at weight I 10 and weight II
The underface of 11；The height that the hard-wired height of fixed pulley group 7 is installed more than running block 6；Two fixed pulleys 4 are arranged on
In same level, and the height that setting height(from bottom) is installed more than fixed pulley group 7；One end of flexible cable 2 is fixedly mounted on running block 6
Top, after sequentially passing through running block 6, fixed pulley group 7 and two fixed pulleys 4, the other end and the test mould being placed in pond
Type 1 is fixing to be connected, and flexible cable 2 is alternately across the fixed pulley in the movable pulley in running block 6 and fixed pulley group 7；Vicarious
Speed meter 5 is placed on around the flexible cable 2 between the water surface and running block 6, measures and record the speed in test model 1 floating-upward process
Degree；Underwater sound measuring equipment 3 is placed in pond in the region of test model 1 uniform motion, the spoke under water that record test model 1 produces
Penetrate noise, provide the free far-field radiation timely frequency conversion of noise magnitude and become spectrogram.
The test procedure of assay device described in this example is as follows:
(1) speed the most at the uniform velocity floated and the time of uniform motion, suitable assembly pulley middle pulley is determined
Number；
(2) according to ascent rate and the resistance of test model 1, determine the quality of weight II 11 and distance L2 of decline and
The quality of weight I 10 and distance L1 of decline；Weight II 11, under himself action of gravity, declines the distance of L2 to damper mechanism
When 12, the acceleration that the test model 1 in pond obtains under the effect of running block 6 and fixed pulley group 7 is much larger than weight II
The acceleration of 11, and test model 1 reaches to test required ascent rate；Weight I 10 overcomes test system by the gravity of self
The resistance of system, makes test model 1 keep required speed at the uniform velocity to float, until weight I 10 declines distance and the weight II 11 of L1
Contact, now test model 1 emerges just.
(3) according to required vibration isolating effect, damper mechanism 12 is made；
(4) described assay device is assembled, make test model 1 near basin bottom, by crane by weight I 10 He
Weight II 11 is lifted to corresponding position, and debugs underwater sound measuring equipment and be at normal operating conditions；
(5) release weight I 10 and weight II 11 start test, after model 1 to be tested surfaces, reclaim；Analyze
Data in data acquisition recorder in test model 1, obtain vibration and the near field noise of test model 1；With reference to GJB4057-
2000 analyze underwater sound measuring equipment data, obtain the characteristic of the free far-field noise of test model 1.
Embodiment 2, on the basis of embodiment 1, is fixedly mounted on the inside of streamlined submerged structure 13 by test model,
Streamlined submerged structure 13 is fixing with flexible cable 2 to be connected, and then carries out test of floating.
Embodiment 3, on the basis of embodiment 1, fixedly mounts guiding mechanism II 14 in pond, and by test model 1
It is arranged on streamlined submerged structure 13 internal；Guiding mechanism II 14 is made up of the vertical rod of two vertical waters surface, guiding mechanism II
Two vertical rods in 14 contact with streamlined submerged structure 13 respectively, and streamlined submerged structure 13 is fixing with flexible cable 2 to be connected；
Then test of floating is carried out.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (7)
1. noise high-speed floating acoustic experiment device in a pond, it is characterised in that: described assay device includes testing mould
Type (1), flexible cable (2), underwater sound measuring equipment (3), two fixed pulleys (4), vicarious speed meter (5), running blocks (6), calmly cunning
Wheels (7), guiding mechanism I (8), connector (9), weight I (10), weight II (11) and damper mechanism (12)；
The quality of described weight I (10) is less than the quality of weight II (11)；Described test model (1) there is data acquiring and recording
Instrument, the self noise produced in record test model (1) floating-upward process；Described guiding mechanism I (8) is hung down by a horizon bar and two
Straight-bar forms, and the two ends of horizon bar are slidably matched with two vertical rods respectively and are mutually perpendicular to two vertical rods respectively, level
Bar under the effect of external force along vertical rod length direction slide；
Two vertical rods of guiding mechanism I (8) are fixedly mounted on the ground that pond is other, and the movable pulley in running block (6) is solid
Dingan County is contained on the horizon bar of guiding mechanism I (8)；It is connected by flexible cable (2) between weight I (10) with weight II (11), and weight
Thing I (10) is connected by connector (9) is fixing with the horizon bar of guiding mechanism I (8)；Damper mechanism (12) install on the ground and
In weight I (10) and the underface of weight II (11)；Fixed pulley group (7) hard-wired height is installed more than running block (6)
Height；Two fixed pulleys (4) are arranged in same level, and the height that setting height(from bottom) is installed more than fixed pulley group (7)；
One end of flexible cable (2) is fixedly mounted on the top of running block (6), sequentially passes through running block (6), fixed pulley group (7) and two
After individual fixed pulley (4), the other end is fixing with the test model (1) being placed in pond to be connected, and flexible cable (2) is alternately across movable pulley
Movable pulley in group (6) and the fixed pulley in fixed pulley group (7)；Vicarious speed meter (5) is placed on the water surface and running block (6)
Between flexible cable (2) around, measure and record the speed in test model (1) floating-upward process；Underwater sound measuring equipment (3) is placed on water
In pond in the region of test model (1) uniform motion, the underwater radiation noise that record test model (1) produces, be given the most remote
The field timely frequency conversion of radiated noise magnitude becomes spectrogram.
Noise high-speed floating acoustic experiment device in a kind of pond the most according to claim 1, it is characterised in that: described
The depth of water in pond is not less than 15m, and test model (1) out to out is not more than 2m.
Noise high-speed floating acoustic experiment device in a kind of pond the most according to claim 1, it is characterised in that: weight
I (10) and the rubber-coated plate in outside of weight II (11).
Noise high-speed floating acoustic experiment device in a kind of pond the most according to claim 1, it is characterised in that: will examination
Testing model (1) and be arranged on streamlined submerged structure (13) inside, streamlined submerged structure (13) is fixing with flexible cable (2) to be connected.
Noise high-speed floating acoustic experiment device in a kind of pond the most according to claim 1, it is characterised in that: at water
Pond fixedly mounts guiding mechanism II (14), and it is internal that test model (1) is arranged on streamlined submerged structure (13)；Guiding machine
Structure II (14) is made up of the vertical rod of two vertical waters surface, two vertical rods in guiding mechanism II (14) respectively with streamlined water
Lower structure (13) contacts, and streamlined submerged structure (13) is fixing with flexible cable (2) to be connected.
Noise high-speed floating acoustic experiment device in a kind of pond the most according to claim 1, it is characterised in that: described
Flexible cable lays hydrophobic material on (2).
Noise high-speed floating acoustic experiment device in a kind of pond the most according to claim 1, it is characterised in that: guide
The upper coated with viscoelastic layer of mechanism I (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610635870.5A CN106184662B (en) | 2016-08-05 | 2016-08-05 | Noise high-speed floating acoustic experiment device in a kind of pond |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610635870.5A CN106184662B (en) | 2016-08-05 | 2016-08-05 | Noise high-speed floating acoustic experiment device in a kind of pond |
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| CN106184662A true CN106184662A (en) | 2016-12-07 |
| CN106184662B CN106184662B (en) | 2018-05-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267296A (en) * | 2018-01-04 | 2018-07-10 | 马峰 | Study the experimental provision and method of underwater obstruction flow field disturbing effect |
| CN110307896A (en) * | 2019-06-12 | 2019-10-08 | 中国舰船研究设计中心 | A kind of characteristics of ship underwater radiation noise measurement hydrophone suspension and lay method |
| CN112706892A (en) * | 2020-12-11 | 2021-04-27 | 中国特种飞行器研究所 | Device and method for testing controllable speed free floating of underwater vehicle model |
| CN112798225A (en) * | 2021-01-21 | 2021-05-14 | 中国人民解放军海军工程大学 | Vertical tandem double-test-section cavity water tunnel test device |
| CN113532796A (en) * | 2021-07-19 | 2021-10-22 | 哈尔滨工程大学船舶装备科技有限公司 | Device and method for testing hydrodynamic noise reduction effect of super-hydrophobic coating |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647084U (en) * | 2010-03-30 | 2010-11-24 | 中国船舶重工集团公司第七〇二研究所 | Rope pulley towing device of underwater navigation body |
| KR20120032942A (en) * | 2010-09-29 | 2012-04-06 | 삼성중공업 주식회사 | Apparatus to test model ship |
| CN103674479A (en) * | 2013-12-18 | 2014-03-26 | 哈尔滨工程大学 | Non-smooth surface fluid friction resistance testing device and testing method |
| CN203785669U (en) * | 2014-04-10 | 2014-08-20 | 国家海洋局南海工程勘察中心 | High-precision deep sea depth detection device |
| CN104986311A (en) * | 2015-07-08 | 2015-10-21 | 中国船舶重工集团公司第七一九研究所 | Low-noise high-navigational-speed large-depth underwater unpowered upwards-floating test platform |
| CN205916311U (en) * | 2016-08-05 | 2017-02-01 | 中国船舶重工集团公司第七一九研究所 | High -speed acoustics test device that floats of low noise in pond |
-
2016
- 2016-08-05 CN CN201610635870.5A patent/CN106184662B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647084U (en) * | 2010-03-30 | 2010-11-24 | 中国船舶重工集团公司第七〇二研究所 | Rope pulley towing device of underwater navigation body |
| KR20120032942A (en) * | 2010-09-29 | 2012-04-06 | 삼성중공업 주식회사 | Apparatus to test model ship |
| CN103674479A (en) * | 2013-12-18 | 2014-03-26 | 哈尔滨工程大学 | Non-smooth surface fluid friction resistance testing device and testing method |
| CN203785669U (en) * | 2014-04-10 | 2014-08-20 | 国家海洋局南海工程勘察中心 | High-precision deep sea depth detection device |
| CN104986311A (en) * | 2015-07-08 | 2015-10-21 | 中国船舶重工集团公司第七一九研究所 | Low-noise high-navigational-speed large-depth underwater unpowered upwards-floating test platform |
| CN205916311U (en) * | 2016-08-05 | 2017-02-01 | 中国船舶重工集团公司第七一九研究所 | High -speed acoustics test device that floats of low noise in pond |
Non-Patent Citations (2)
| Title |
|---|
| 殷敬伟 杜鹏宇等: "《松花江冰下声学实验技术研究》", 《应用声学》 * |
| 计方: "低噪声复合托板水下声学实验研究", 《工程力学》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267296A (en) * | 2018-01-04 | 2018-07-10 | 马峰 | Study the experimental provision and method of underwater obstruction flow field disturbing effect |
| CN110307896A (en) * | 2019-06-12 | 2019-10-08 | 中国舰船研究设计中心 | A kind of characteristics of ship underwater radiation noise measurement hydrophone suspension and lay method |
| CN112706892A (en) * | 2020-12-11 | 2021-04-27 | 中国特种飞行器研究所 | Device and method for testing controllable speed free floating of underwater vehicle model |
| CN112798225A (en) * | 2021-01-21 | 2021-05-14 | 中国人民解放军海军工程大学 | Vertical tandem double-test-section cavity water tunnel test device |
| CN112798225B (en) * | 2021-01-21 | 2023-09-05 | 中国人民解放军海军工程大学 | Vertical tandem double-test section cavitation water hole test device |
| CN113532796A (en) * | 2021-07-19 | 2021-10-22 | 哈尔滨工程大学船舶装备科技有限公司 | Device and method for testing hydrodynamic noise reduction effect of super-hydrophobic coating |
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