CN109895943A - A kind of double Shell titanium alloy pod acoustics Three dimensions control method - Google Patents
A kind of double Shell titanium alloy pod acoustics Three dimensions control method Download PDFInfo
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Abstract
The invention discloses a kind of double Shell titanium alloy pod acoustics Three dimensions control methods, the following steps are included: step 1: determining the spatial dimension of sound transmitting window, according to the horizontal scan angle decided through consultation and it is vertical bow, the elevation angle determines sound transmitting window range in the case where molded line determines；Step 2: acoustical cavity optimizes, according to the sound transmitting window range of delimitation, the structure in non-entrant sound region is arranged and is calculated；Step 3: acoustics simulation calculation carries out Acoustic Modeling calculating according to the material and structure of sound transmitting window；Step 4: vibration and noise reducing design inside the operatic tunes, emphasis are controlled for the noise in sonar working frequency range, sound-absorbing material is carried out in the non-entrant sound region of the aftbulkhead, sonar platform and bottom of the operatic tunes and vibration and noise reducing material pastes.The a variety of subjects of technological synthesis of the invention, incorporation engineering practical experience, systematicness is strong, and good operability provides a kind of effective engineering method for the acoustic control of Bulb bows pod.
Description
Technical field
The present invention relates to ship structures, and in particular to a kind of double Shell titanium alloy pod acoustics Three dimensions control method,
Acoustics design suitable for Bulb bows pod.
Background technique
Naval vessel Bulb bows are the operating cabins of bow mounted sonar, are window of the anti-submarine warfare to undersea detection, and function admirable makes
It is the important guarantee of naval vessel anti-submarine warfare ability with service life long Bulb bows structure.Bulb-bowed water conservancy diversion cover structure is always naval vessel
The difficult point of design, should guarantee hull hyperbolic-type and structural behaviour, realize its good entrant sound function again.Domestic XXXA type
The successful application of titanium alloy pod opens the new era of surface vessel titanium alloy pod application.Titanium alloy pod knot
The advantages that structure intensity is high, and acoustical behavior is good, long service life, meets the requirement of Modern Ships sonar.
The underwater extension set outer dimension of XXXA type sonar of certain corvette stem installation and the XXX type of XXXA type warship installation
It is almost the same.And certain corvette displacement only kiloton.Often naval vessel scale is smaller, and the line style curvature in Bulb bows region is got over
Greatly, entrant sound effect is more difficult to be guaranteed；Scale is smaller, and closer apart from the Main Noise Sources such as propeller and host, self noise is more
It is difficult to control.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of double Shell titanium alloy pod acoustics Three dimensions control method,
It can preferably be solved for the acoustics design contradiction of warship double Shell pod.
In order to solve the above technical problems, double Shell titanium alloy pod acoustics Three dimensions control method of the invention, including
Following steps:
Step 1: determining the spatial dimension of sound transmitting window；
According to the horizontal scan angle decided through consultation and it is vertical bow, the elevation angle determines sound transmitting window range in the case where molded line determines；
Step 2: acoustical cavity optimizes；
According to the sound transmitting window range of delimitation, the structure in non-entrant sound region is arranged and is calculated；
Step 3: acoustics simulation calculation；
According to the material and structure of sound transmitting window, Acoustic Modeling calculating is carried out；
Step 4: vibration and noise reducing design inside the operatic tunes；
Emphasis is controlled for the noise in sonar working frequency range, in the aftbulkhead, sonar platform and bottom of the operatic tunes
The non-entrant sound region in portion carries out sound-absorbing material and vibration and noise reducing material pastes.
Further, in the first step, usually consider blocking for internal framework, certain amplification, sound transmitting window model should be given
It encloses after determining, according to specific construction requirement, further determines that the height of bulkhead below and top sonar platform.
Further, in the second step, component is less as far as possible to be arranged in inside the operatic tunes, and according to proper calculation sound transmitting window
Whether the intensity of structure and non-entrant sound structure meets code requirement.
Further, in the third step, using finite element method, Modeling Calculation only builds the structure of sound transmitting window
Mould, acoustics do the method for BORDER PROCESSING using an acoustic simulation, other parts；In view of basic matrix size is to the shadow of simulation precision
It rings, acoustics is carried out to the system that sound transmitting window and basic matrix form and calculates more safe, the cylindric sound source of acoustic simulation, sound transmitting window, which has, to be added
Strengthening tendons, addition should be modeled.
Further, in the 4th step, sound-absorbing material should choose the maximum material of acoustic absorptivity according to the working frequency range of sonar
Material pastes and requires non-entrant sound position without exposed metal/bare metal, and backing, platform and bulkhead carry out smooth, reduction reflection.
Double Shell titanium alloy pod acoustics Three dimensions control method of the invention, set forth Bulb bows comprehensively and systematically
The acoustics design of pod, covers entrant sound design and self noise controls two aspects, for the design of my naval vessel entrant sound pod
Provide good design basis.New herbicide titanium alloy Bulb bows water conservancy diversion cover structure is in the base for guaranteeing structural strength and inner space
On plinth, structural-acoustic design is carried out, so that it is determined that reasonable organization plan, so that Bulb bows structure meets wanting for intensity and acoustics
It asks.
By comprehensive pod acoustic control method implement so that the sound translative performance of the pod on novel escort vessel and
The contradiction of self noise performance is resolved, and novel guide cover structure is compact, sound translative performance is excellent, and real warship tests its self noise level
It is effectively controlled.
Detailed description of the invention
The horizontal scan angle according to sonar of Fig. 1 embodiment of the present invention determines sound transmitting window minimum level range；
Fig. 2 embodiment of the present invention according to the vertical angle of depression of sonar and the elevation angle, determine the smallest vertical range of sound transmitting window；
The acoustics computing system schematic diagram of Fig. 3 embodiment of the present invention；
The sound system of Fig. 4 embodiment of the present invention models；
The sound system typical calculation result of Fig. 5 embodiment of the present invention；
The inner sound absorption material of Fig. 6 embodiment of the present invention pastes.
Specific embodiment
Step 1: determining the spatial dimension of sound transmitting window；
According to the horizontal scan angle decided through consultation and it is vertical bow, the elevation angle determines sound transmitting window range in the case where molded line determines,
Usually consider that internal framework blocks, certain amplification should be given, after sound transmitting window range determines, according to specific construction requirement,
Further determine that the height of bulkhead below and top sonar platform.
Step 2: acoustical cavity optimizes；
According to the sound transmitting window range of delimitation, the structure in non-entrant sound region is arranged and is calculated.Component is less as far as possible
It is arranged in inside the operatic tunes, and whether code requirement is met according to the intensity of proper calculation entrant sound window construction and non-entrant sound structure.
Step 3: acoustics simulation calculation；
According to the material and structure of sound transmitting window, Acoustic Modeling calculating is carried out.Under normal circumstances, using FEM calculation side
Method, Modeling Calculation only model the structure of sound transmitting window, and acoustics is done using an acoustic simulation, other parts BORDER PROCESSING
Method；It is more steady to carry out acoustics calculating to the system that sound transmitting window and basic matrix form for influence in view of basic matrix size to simulation precision
Appropriate, the cylindric sound source of acoustic simulation, sound transmitting window has reinforcing rib, should model addition.
Step 4: vibration and noise reducing design inside the operatic tunes；
Emphasis is controlled for the noise in sonar working frequency range, in the aftbulkhead, sonar platform and bottom of the operatic tunes
The non-entrant sound region in portion carries out sound absorption and vibration and noise reducing material pastes.Sound-absorbing material should choose sound absorption system according to the working frequency range of sonar
The maximum material of number pastes and requires non-entrant sound position without exposed metal/bare metal, and backing, platform and bulkhead carry out smooth, reduction reflection.
Specifically, as shown in Figure 1 and Figure 2, it after molded line determination outside Bulb bows, according to the horizontal scan angle decided through consultation and hangs down
To bow, the elevation angle determines sound transmitting window range in the case where molded line determines, usually consider that internal framework blocks, should give certain
Amplification, sound transmitting window range determine after, according to specific construction requirement, further determine that aftbulkhead and top sonar platform
Height；
As shown in figure 3, being designed to the structure of aftbulkhead, sonar platform and backing, bulkhead harmony Naan dress is flat
On the outside of the platform structure operatic tunes reversed as far as possible, the design of backing keel structure is gentle as far as possible, facilitates subsequent progress sound-absorbing material laying.To whole
Body structure calculates worst two load cases combinations, final answer is calculated according to the requirement of GJB 4000-2000
Power meets product requirement；
As shown in Figure 4, Figure 5, three-dimensional modeling is carried out to double-skin sound transmitting window and sonar transducer array system, in finite element software
In, its coverboard is calculated in the insertion loss of all angles；
It is pasted as shown in fig. 6, carrying out sound-absorbing material to transparent portion, selects the big sound-absorbing material of acoustic absorptivity, to including
The non-entrant sound position such as platform, backing and aftbulkhead pastes comprehensively, and all metal coverings are covered；
Embodiment:
Under the premise of Bulb bows line style determines, according to step 1~4 steps, gradually carry out.The three-dimensional of sound transmitting window is determined first
Range, then carry out structure arrangement and calculate to check, third step carries out acoustics simulation calculation, and the 4th step carries out self noise control and sets
Meter.
1 determines that maximum sound transmitting window is a+2 ° according to a ° of horizontal scan angle, and the vertical elevation angle is b °, and the angle of depression is c °, determines entrant sound
The minimum vertical range of window is b+1 °, and the angle of depression is c+2 °, according to the installation element of basic matrix, while determining that aftbulkhead is #d rib position, sound
Naan assembling platform is e mm on baseline.
2 determine that aftbulkhead framework size is 6*240/8*80, and sonar platform framework size is 5*200/6*60, backing
Keel size is 8*500/10*100；The skeleton of bulkhead framework, mounting platform is backwards to outside the operatic tunes, the final maximum that calculates is answered
Power is less than allowable exert oneself.
3, according to acoustics computing system schematic diagram, model double Shell sound transmitting window and sonar transducer array, and sound transmitting window boundary is pressed
It is handled according to hypersorption, calculates the insertion loss under sonar working frequency range, and compare with technical requirements.
4, according to structure chart, paste sound-absorbing material of the non-transparent portion selection acoustic absorptivity greater than α comprehensively, are owned
Metal covering is covered, and bottom pastes smooth as far as possible, reduction reflection.
Obviously, those skilled in the art can carry out various changes and deformation without departing from essence of the invention to the present invention
Mind and range.In this way, if these modification and variation belong within the scope of claim and its equivalent technologies of the invention, then
The present invention is also intended to encompass including these changes and deformation.
Claims (5)
1. a kind of double Shell titanium alloy pod acoustics Three dimensions control method, which comprises the following steps:
Step 1: determining the spatial dimension of sound transmitting window；
According to the horizontal scan angle decided through consultation and it is vertical bow, the elevation angle determines sound transmitting window range in the case where molded line determines；
Step 2: acoustical cavity optimizes；
According to the sound transmitting window range of delimitation, the structure in non-entrant sound region is arranged and is calculated；
Step 3: acoustics simulation calculation；
According to the material and structure of sound transmitting window, Acoustic Modeling calculating is carried out；
Step 4: vibration and noise reducing design inside the operatic tunes；
Emphasis is controlled for the noise in sonar working frequency range, non-in the aftbulkhead, sonar platform and bottom of the operatic tunes
Entrant sound region carries out sound-absorbing material and vibration and noise reducing material pastes.
2. double Shell titanium alloy pod acoustics Three dimensions control method according to claim 1, which is characterized in that described
In the first step, blocking for internal framework is usually considered, certain amplification should be given, after sound transmitting window range determines, according to specific
Construction requirement further determines that the height of bulkhead below and top sonar platform.
3. double Shell titanium alloy pod acoustics Three dimensions control method according to claim 2, which is characterized in that described
In second step, component is less as far as possible to be arranged in inside the operatic tunes, and according to proper calculation entrant sound window construction and non-entrant sound structure
Whether intensity meets code requirement.
4. double Shell titanium alloy pod acoustics Three dimensions control method according to claim 3, which is characterized in that described
In third step, using finite element method, Modeling Calculation only models the structure of sound transmitting window, and acoustics is using an acoustic mode
Quasi-, other parts do the method for BORDER PROCESSING；Influence in view of basic matrix size to simulation precision forms sound transmitting window and basic matrix
System carry out acoustics calculate it is more safe, the cylindric sound source of acoustic simulation, sound transmitting window has reinforcing rib, should model addition.
5. double Shell titanium alloy pod acoustics Three dimensions control method according to claim 4, which is characterized in that described
In 4th step, sound-absorbing material should choose the maximum material of acoustic absorptivity according to the working frequency range of sonar, paste and require non-entrant sound portion
Without exposed metal/bare metal, backing, platform and bulkhead carry out smooth, reduction reflection for position.
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| CN201910112331.7A CN109895943A (en) | 2019-02-13 | 2019-02-13 | A kind of double Shell titanium alloy pod acoustics Three dimensions control method |
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| CN201910112331.7A CN109895943A (en) | 2019-02-13 | 2019-02-13 | A kind of double Shell titanium alloy pod acoustics Three dimensions control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113792383A (en) * | 2021-09-10 | 2021-12-14 | 中国舰船研究设计中心 | Acoustic isolation method for comprehensively detecting visual field and noise shielding effect |
| CN113987863A (en) * | 2021-10-15 | 2022-01-28 | 中国舰船研究设计中心 | Acoustic transmission performance simulation calculation method based on dome structure design scheme |
Citations (3)
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| CN103144739A (en) * | 2013-03-11 | 2013-06-12 | 韩通（上海）新能源船舶设计研发有限公司 | Manufacturing method of active separated bulbous bow |
| CN106741719A (en) * | 2015-11-20 | 2017-05-31 | 中国舰船研究设计中心 | A kind of comprehensive arrangement safeguard structure |
| CN107389301A (en) * | 2017-07-26 | 2017-11-24 | 中国舰船研究设计中心 | Bow dome stream swashs surging pressure test model |
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2019
- 2019-02-13 CN CN201910112331.7A patent/CN109895943A/en active Pending
Patent Citations (3)
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| CN103144739A (en) * | 2013-03-11 | 2013-06-12 | 韩通（上海）新能源船舶设计研发有限公司 | Manufacturing method of active separated bulbous bow |
| CN106741719A (en) * | 2015-11-20 | 2017-05-31 | 中国舰船研究设计中心 | A kind of comprehensive arrangement safeguard structure |
| CN107389301A (en) * | 2017-07-26 | 2017-11-24 | 中国舰船研究设计中心 | Bow dome stream swashs surging pressure test model |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113792383A (en) * | 2021-09-10 | 2021-12-14 | 中国舰船研究设计中心 | Acoustic isolation method for comprehensively detecting visual field and noise shielding effect |
| CN113792383B (en) * | 2021-09-10 | 2022-10-21 | 中国舰船研究设计中心 | Acoustic isolation method for comprehensively detecting visual field and noise shielding effect |
| CN113987863A (en) * | 2021-10-15 | 2022-01-28 | 中国舰船研究设计中心 | Acoustic transmission performance simulation calculation method based on dome structure design scheme |
| CN113987863B (en) * | 2021-10-15 | 2023-03-28 | 中国舰船研究设计中心 | Acoustic transmission performance simulation calculation method based on dome structure design scheme |
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