CN209296137U - A kind of hydrodynamic noise identifing source and isolated test macro - Google Patents
A kind of hydrodynamic noise identifing source and isolated test macro Download PDFInfo
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- CN209296137U CN209296137U CN201821949513.7U CN201821949513U CN209296137U CN 209296137 U CN209296137 U CN 209296137U CN 201821949513 U CN201821949513 U CN 201821949513U CN 209296137 U CN209296137 U CN 209296137U
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Abstract
The utility model proposes a kind of hydrodynamic noise identifing source and isolated test macro, two kinds of noise sources of structural noise can be swashed to the fluid straight hair noise and stream for causing ship hydrodynamics noise and identified, and isolate the contribution of two kinds of noise sources.The system of the utility model passes through in the complete arrangement hydrophone of hull hydrodynamic noise region, vibrating sensor and oscillatory pressure pick-up, carry out correlation calculations analysis by the coupled noise of measuring hydrophone and vibrating sensor and oscillatory pressure pick-up measured signal, realize the identification to fluid straight hair noise in hydrodynamic noise and the sharp structural noise of stream with separate.The test macro has the characteristics that structure is simple, easy for installation, cheap, technical maturity is high, can be with ships such as widely applied surface vessel, underwater submarines.The test system structure is simple, be easily achieved, high reliablity, easy to install and use, environmental suitability is strong.
Description
Technical field
The utility model belongs to Noise Sources Identification and separation technology field, and in particular to a kind of hydrodynamic noise identifing source with
Isolated test macro, suitable for ship hydrodynamics noise fluid straight hair sound and flow swash noise identified and separated.
Background technique
One of three big noise sources when hydrodynamic noise is as ship underwater navigation will significantly increase under the middle high speed of a ship or plane
Greatly, become the main noise source of ship.The mechanism of production of hydrodynamic noise are as follows: when ship underwater navigation, hull surface turbulence edge
There are random fluctuation pressure in interlayer, on the one hand these fluctuation pressures directly generate acoustic radiation, i.e. fluid straight hair sound；On the one hand
Incentive structure vibration generates acoustic radiation, that is, flows and swash noise.
According to above-mentioned mechanism, hydrodynamic noise f0It is divided into two parts, i.e. f0=f1+f2, wherein f1Fluid is represented directly to generate
Noise；f2It represents and flows noise caused by swashing structural vibration.It is directed to the test macro of ship noise at present, although enough separate and know
Not Chu mechanical noise, hydrodynamic noise, the big noise source of propeller noise three, and can to the position of Main Noise Sources carry out it is substantially fixed
Position.But for Main Noise Sources -- the hydrodynamic noise under the middle high speed of a ship or plane, since the noise that hydrophone receives is that fluid is straight
Sounding and flow swash structural noise collective effect under as a result, can not further determine that it is still flowed from fluid straight hair sound on earth
Swash structural noise, this affects the further positioning and analysis to real ship hydrodynamic noise source, leads to the specific aim of control measure
It is not strong.
Utility model content
In view of this, the utility model proposes a kind of hydrodynamic noise identifing source and isolated test macro, it can be right
Cause the fluid straight hair noise of ship hydrodynamics noise and flow sharp two kinds of noise sources of structural noise to be identified, and isolates two kinds
The contribution of noise source.
To achieve the above object, the utility model proposes a kind of hydrodynamic noise identifing source and isolated test macro,
Including data acquisition front, data record analyzer and a set of above sensor combinations, wherein the sensor combinations packet
Include hydrophone, vibrating sensor and oscillatory pressure pick-up；
Sensor in same combination is arranged in same range, and wherein hydrophone is fixed on hull hydrodynamic noise range
Domain, for acquiring the region self noise signal；Vibrating sensor is for acquiring hull structural vibration speed or acceleration signal；Arteries and veins
Dynamic pressure force snesor is for measuring hull structure boundary turbulence pulsation pressure signal；
Data acquisition front is separately connected with hydrophone, vibrating sensor and oscillatory pressure pick-up, acquires the biography
The signal of each sensor in sensor combination, wherein by Ship Structure vibration velocity or acceleration signal, according to vibro-acoustic spoke
Theory is penetrated, Ship Structure vibration signal is calculated；
Data record analyzer is by Ship Structure vibration signal in the collected same sensor combinations of data acquisition front
And fluctuation pressure signal makees coherent analysis with the noise region signal in same combination respectively, realizes in hydrodynamic noise
Fluid straight hair noise and the identification and separation for flowing sharp structural noise two parts noise source.
Wherein, the sensor combinations quantity is adjusted according to shiphoard measurement needs.
Wherein, hydrophone is fixed on tested Ship Structure surface, and vibrating sensor and Ship Structure are rigidly connected.
Wherein, by oscillatory pressure pick-up being rigidly secured to hull surface, fluctuation pressure is passed in hull surface borehole
Sensor probe is flushed with tested Ship Structure surface, and pulse pressure dynamic pickup is perpendicular to body structure surface.
Wherein, data acquisition front is connected by watertight cable and hydrophone, vibrating sensor and oscillatory pressure pick-up
It connects.
Wherein, the data record analyzer is computer.
The utility model has the advantages that
The system of the utility model passes through in the complete arrangement hydrophone of hull hydrodynamic noise region, vibrating sensor and arteries and veins
Dynamic pressure force snesor, by the coupled noise of measuring hydrophone and vibrating sensor and oscillatory pressure pick-up measured signal into
The analysis of row correlation calculations, realize the identification to fluid straight hair noise in hydrodynamic noise and the sharp structural noise of stream with separate.It should
Test macro has the characteristics that structure is simple, easy for installation, cheap, technical maturity is high, can be with the widely applied water surface
The ships such as naval vessel, underwater submarine.The test system structure is simple, is easily achieved, high reliablity, easy to install and use, environment
It is adaptable.
Detailed description of the invention
Fig. 1 is the principles of the present invention schematic diagram.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
The specific Noise Sources Identification of the utility model with separate the method using coherent analysis.Coherence analysis is suitable for more
Single output model is inputted, the relationship between the source of each input and the noise spectrum of output is mainly analyzed, determines each noise source
Influence to the characteristic frequency of output.Coherence analysis is based on coherent function, and coherent function shows between two functions
Internal relation, distinguishes a frequency-domain function of two signal discrete component degrees of correlation, and the size of coherent function shows output
From the energy proportion of each noise source signal in energy.The coherence factor the big, show correlation between two o'clock more
By force.
Ideally xi(t) and the coherent function γ of y (t)x 2 y(f) is defined as:
In formula, Sxx(f) and SyyIt (f) is respectively xi(t) and y (t) from compose, SxyIt (f) is xi(t) and the cross-spectrum of y (t).
In the utility model, by Ship Structure vibration signal and fluctuation pressure signal respectively with self noise signal f0Make phase
Stemness analysis, to identify fluid straight hair noise source and flow sharp Structure Radiant Noise Source.On this basis, it is vibrated and is accelerated using measuring point
Degree calculates noise component(s) f caused by structural vibration2, the noise component(s) f of fluid straight hair sound can be obtained1=f0-f2。
A kind of hydrodynamic noise identifing source with separate test macro as shown in Figure 1, including data acquisition front 4, data note
Record analyzer 5 and a set of above sensor combinations, wherein the sensor combinations include hydrophone 1, vibrating sensor 2 with
And oscillatory pressure pick-up 3；
Sensor in same combination is arranged in same range, listens in the biggish region arrangement water of ship hydrodynamics noise
Device 1, vibrating sensor 2 and oscillatory pressure pick-up 3 analyze hydrodynamic force by measuring while hydrophone 1 and two sensors
The source that noise generates.The hydrophone 1, vibrating sensor 2 and 3 quantity of oscillatory pressure pick-up can be needed according to shiphoard measurement into
Row adjustment, suitably increases measuring point quantity in the biggish region of hydrodynamic noise.But it need to guarantee that each hydrophone must nearby have one
A vibrating sensor 2 and an oscillatory pressure pick-up 3 are corresponding to it.
Wherein, hydrophone 1 is fixed on the biggish region of hull hydrodynamic noise, is rigidly secured to ship surface in the present embodiment
Face, for acquiring the regional fluid straight hair sound and flowing the noise i.e. region self noise signal swashed under two provenance collective effect of structure
f0。
Vibrating sensor 2 and Ship Structure are rigidly connected, and vibrating sensor is rigidly secured to hull surface in the present embodiment,
Acquire hull structural vibration acceleration or vibration velocity signal.According to vibro-acoustic theory of radiation, is vibrated and accelerated by body structure surface
Degree can calculate Ship Structure vibration signal；
Oscillatory pressure pick-up 3 is arranged in body structure surface, is used for measurement structure boundary turbulence pulsation pressure.Pulse pressure power passes
Sensor probe is flushed with body structure surface, and pulse pressure dynamic pickup is perpendicular to body structure surface.By in hull in the present embodiment
Oscillatory pressure pick-up is rigidly secured to hull surface by surface borehole, for measuring hull surface turbulence pulsation pressure signal；
Data acquisition front 4 is connected by watertight cable and hydrophone 1, vibrating sensor 2 and oscillatory pressure pick-up 3
It connects, noise region signal, vibration acceleration signal and fluctuation pressure signal is acquired and is improved, and is filtered and puts
Greatly, wherein the behaviour such as convert the pressure signal of hydrophone and sensor to digital signal, and carry out signal amplification, conditioning, filtering
Make.Data acquisition front 4 is separately connected with hydrophone 1, vibrating sensor 2 and oscillatory pressure pick-up 3, acquires the sensing
The signal of each sensor in device combination, wherein by Ship Structure vibration velocity or acceleration signal, radiated according to vibro-acoustic
Theory calculates Ship Structure vibration signal；
Data record analyzer 5 believes Ship Structure vibration in the collected same sensor combinations of data acquisition front 4
Number and fluctuation pressure signal make coherent analysis with the noise region signal in same combination respectively, realize to hydrodynamic noise
Middle fluid straight hair noise and the identification and separation for flowing sharp structural noise two parts noise source.The data analysis recorder 5 receives
By data acquisition front treated digital signal, time domains and the frequency domain such as storage noise, vibration acceleration and fluctuation pressure
Data, and simple analysis and processing are carried out to data.Data record analyzer 5 is generally common computer, before data acquisition
Treated that data are stored in data record analyzer 5 at end 4.It is adopted while by noise, structural vibration, fluctuation pressure
Collection can be realized to fluid straight hair sound in hydrodynamic noise in conjunction with correlation values Simulation Analysis and flow sharp structural noise two
The separation in partial noise source.
The utility model test macro specifically builds that steps are as follows:
Step 1, hydrophone 1 is arranged in hull hydrodynamic noise large area；
Step 2, vibrating sensor 2 is arranged near hydrophone 1；
Step 3, oscillatory pressure pick-up 3 is arranged near hydrophone 1；
Repeat the above steps 1-3, completes the arrangement of more set hydrophones 1 and two kind of sensor；
Step 4, hydrophone 1, vibrating sensor 2 and oscillatory pressure pick-up 3 are acquired by watertight cable and data
Front end 4 is connected；
Step 5, data record analyzer 5 is connected with data acquisition front 4, completes test macro and builds.
In conclusion the above is only the preferred embodiments of the present utility model only, it is not intended to limit the utility model
Protection scope.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap
Containing being within the protection scope of the utility model.
Claims (6)
1. a kind of hydrodynamic noise identifing source and isolated test macro, which is characterized in that including data acquisition front (4), number
According to recorder analyser (5) and a set of above sensor combinations, wherein the sensor combinations include hydrophone (1), vibration
Sensor (2) and oscillatory pressure pick-up (3)；
Sensor in same combination is arranged in same range, and wherein hydrophone (1) is fixed on hull hydrodynamic noise region,
For acquiring the region self noise signal；Vibrating sensor (2) is for acquiring hull structural vibration speed or acceleration signal；Arteries and veins
Dynamic pressure force snesor (3) is for measuring hull structure boundary turbulence pulsation pressure signal；
Data acquisition front (4) is separately connected with hydrophone (1), vibrating sensor (2) and oscillatory pressure pick-up (3), is adopted
Collect the signal of each sensor in the sensor combinations, wherein by Ship Structure vibration velocity or acceleration signal, according to vibration
Dynamic-sound radiant theory, calculates Ship Structure vibration signal；
Data record analyzer (5) believes Ship Structure vibration in the collected same sensor combinations of data acquisition front (4)
Number and fluctuation pressure signal make coherent analysis with the noise region signal in same combination respectively, realize to hydrodynamic noise
Middle fluid straight hair noise and the identification and separation for flowing sharp structural noise two parts noise source.
2. a kind of hydrodynamic noise identifing source as described in claim 1 and isolated test macro, which is characterized in that the biography
Sensor number of combinations is adjusted according to shiphoard measurement needs.
3. a kind of hydrodynamic noise identifing source as described in claim 1 and isolated test macro, which is characterized in that hydrophone
(1) it is fixed on tested Ship Structure surface, vibrating sensor (2) and Ship Structure are rigidly connected.
4. a kind of hydrodynamic noise identifing source as described in claim 1 and isolated test macro, which is characterized in that by
Oscillatory pressure pick-up is rigidly secured to hull surface, oscillatory pressure pick-up (3) probe and tested ship by hull surface borehole
Body body structure surface flushes, and pulse pressure dynamic pickup is perpendicular to body structure surface.
5. a kind of hydrodynamic noise identifing source as described in claim 1 and isolated test macro, which is characterized in that data are adopted
Collection front end (4) is connect by watertight cable with hydrophone (1), vibrating sensor (2) and oscillatory pressure pick-up (3).
6. a kind of hydrodynamic noise identifing source as described in claim 1 and isolated test macro, which is characterized in that the number
It is computer according to recorder analyser (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821949513.7U CN209296137U (en) | 2018-11-23 | 2018-11-23 | A kind of hydrodynamic noise identifing source and isolated test macro |
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| CN201821949513.7U CN209296137U (en) | 2018-11-23 | 2018-11-23 | A kind of hydrodynamic noise identifing source and isolated test macro |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540282A (en) * | 2018-11-23 | 2019-03-29 | 中国船舶重工集团公司第七〇九研究所 | A kind of hydrodynamic noise identifing source and isolated test macro and its building method |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540282A (en) * | 2018-11-23 | 2019-03-29 | 中国船舶重工集团公司第七〇九研究所 | A kind of hydrodynamic noise identifing source and isolated test macro and its building method |
| CN109540282B (en) * | 2018-11-23 | 2024-04-19 | 中国船舶重工集团公司第七一九研究所 | Hydrodynamic noise source identification and separation testing system and construction method thereof |
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