CN117705260A - Graded-rigidity optical fiber towed linear array vibration isolation section - Google Patents
Graded-rigidity optical fiber towed linear array vibration isolation section Download PDFInfo
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- CN117705260A CN117705260A CN202311608412.9A CN202311608412A CN117705260A CN 117705260 A CN117705260 A CN 117705260A CN 202311608412 A CN202311608412 A CN 202311608412A CN 117705260 A CN117705260 A CN 117705260A
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- sheath
- vibration isolation
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- rope
- rigidity
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- 238000002955 isolation Methods 0.000 title claims abstract description 51
- 239000013307 optical fiber Substances 0.000 title claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000003190 viscoelastic substance Substances 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to a graded-rigidity optical fiber towed linear array vibration isolation section, which comprises the following components: the device comprises a connector, a bearing piece, an elastic rope, a supporting component, a sheath, an optical cable, a filler and the like; the sheath is of a tubular structure, and two ends of the sheath are respectively provided with a connector so as to realize the sealing of the sheath; the bearing piece, the elastic rope and the supporting component are all arranged in the sheath; the bearing piece is connected with the connector, and a plurality of rope penetrating holes are designed on the bearing piece; the support components are penetrated on the plurality of elastic ropes and fixed with the shortest elastic rope, and the rest elastic ropes are uniformly distributed among the support components; the optical cable is arranged in the sheath and penetrates through the supporting component, and two ends of the optical cable are respectively connected with the head-to-tail connectors; filling agent is injected into the residual space in the sheath. The invention can realize the self-adaptive change of the rigidity of the vibration isolation section under different towing speeds, and solves the problem of poor vibration isolation performance of the existing vibration isolation section under low towing speed due to larger rigidity. Has important application value in military and civil use.
Description
Technical Field
The invention relates to the technical field of fiber towing line arrays, in particular to a graded-rigidity fiber towing line array vibration isolation section.
Background
The optical fiber towed line array is an array formed by optical fiber hydrophones, has the advantages of light weight, no electromagnetic interference, easy large-scale multiplexing, diameter reduction and the like, and is more and more widely applied. The optical fiber towing line array is generally arranged behind a water surface or underwater moving platform, and when the platform moves, the optical fiber towing line array starts to work, and the vibration and noise of a towing system can be increased by the platform along with wave fluctuation, swinging, wake flow and other factors. Along with the gradual increase of the towing speed, the towing noise is increased rapidly, and becomes one of the main factors limiting the detection performance of the optical fiber towing linear array.
Vibration isolation sections with excellent performance are added before and after the optical fiber towing line array, so that the transmission of vibration and noise of a moving platform is reduced, and the vibration isolation sections are effective ways for inhibiting towing noise. The working speed of the optical fiber towing linear array is generally 4-18 knots, the towing force is smaller at low towing speed, the vibration isolation section with low rigidity is beneficial to improving the vibration isolation effect, but the towing force is larger at high towing speed, and the vibration isolation section with low rigidity is easy to be damaged due to overstretched stress. In order to avoid damage of the vibration isolation section when the towing speed is high, the traditional vibration isolation section of the towing linear array is generally designed according to the highest towing speed, so that the rigidity of the whole vibration isolation section is larger, and the vibration isolation effect is poor when the towing speed is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provide the graded-rigidity fiber-optic linear array vibration isolation section, realize the self-adaptive change of the rigidity of the vibration isolation section under different towing speeds, and solve the problems of larger rigidity and poor vibration isolation performance of the conventional vibration isolation section under low towing speeds.
The aim of the invention is achieved by the following technical scheme. A graded rigidity fiber optic towed linear array vibration isolation section mainly comprises: the device comprises a connector, a bearing piece, an elastic rope, a supporting component, a sheath, an optical cable and a filler; the sheath is of a tubular structure, and two ends of the sheath are respectively provided with a connector so as to realize the sealing of the sheath; the bearing piece, the elastic rope and the supporting component are all arranged in the sheath; the bearing pieces are connected with the connectors, a plurality of rope penetrating holes are designed on the bearing pieces, a plurality of elastic ropes are uniformly arranged between the two bearing pieces after passing through the rope penetrating holes, and each elastic rope is provided with different length allowance according to the rigidity requirement; the support assemblies are penetrated on the plurality of elastic ropes and fixed with the shortest elastic rope, and the rest elastic ropes are uniformly distributed among the support assemblies; the optical cable is arranged in the sheath and penetrates through the supporting component, and two ends of the optical cable are respectively connected with the head-to-tail connectors; and filling agents are injected into the residual space in the sheath so as to improve the hydrostatic resistance of the vibration isolation section and realize neutral buoyancy.
The elastic ropes are a plurality of low-rigidity elastic ropes, and the length allowance of each elastic rope is reserved according to the working navigational speed. Dividing the working navigational speed into n areas, wherein the nth navigational speed interval corresponds to the 1 st to the nth elastic ropes to work. Setting the maximum working tension in each navigational speed area as F n The rigidity of the ropes is K respectively 1 、K 2 ……K n The rigidity of the sheath is K, the 1 st elastic rope is the reference length L, and the length allowance epsilon of the nth elastic rope n The method comprises the following steps:
the bearing piece one end is equipped with two direction reeving holes in horizontal and vertical, and the reeving hole shape is oblong, can penetrate many elastic ropes simultaneously, and the transition fillet is opened around the reeving hole, and transition fillet and bearing piece junction part smooth transition.
The supporting component is provided with a plurality of groups of round holes for threading the elastic ropes, the elastic ropes with the shortest length are provided with positioning rings, the supporting component is prevented from shifting along the elastic ropes, and after the length of the rest elastic ropes is intercepted according to the design allowance, the rest elastic ropes are fastened and fixed by rubber bands.
Preferably, the filler is a solid gum or silicone oil.
Preferably, the sheath is made of soft viscoelastic material.
The beneficial effects of the invention are as follows:
1) A plurality of elastic ropes with low rigidity and different surplus are adopted to replace a single elastic rope with high rigidity, and the elastic ropes are stressed sequentially according to the design sequence, so that the self-adaptive change of rigidity under different towing speeds is realized, namely, the rigidity under low towing speed is small, the rigidity under high towing speed is gradually increased, the speed and the rigidity are mutually matched, and the optimal vibration reduction and isolation effect is achieved.
2) The elastic ropes can improve the tensile property of the vibration isolation section or reduce the size of the vibration isolation section under the same condition.
3) The elastic rope elongation is reasonably designed, so that the problem that the elastic rope loses elasticity due to overlarge elongation after the vibration isolation section is used for a long time can be avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art or ordinary skill.
FIG. 1 is a cross-sectional view of a fiber optic linear array vibration isolation segment with graded stiffness according to one embodiment of the present invention;
FIG. 2 is a schematic perspective view of a bearing member according to an embodiment of the present invention;
FIG. 3 is a schematic view of a support assembly according to an embodiment of the present invention;
fig. 4 is a schematic view of a sealing structure of a connector according to an embodiment of the present invention.
Reference numerals illustrate: connector 1, bearing piece 2, elastic rope A3, elastic rope B4, elastic rope C5, support component 6, sheath 7, optical cable 8, filler 9, clamping ring 10, vertical rope penetrating hole 11, transverse rope penetrating hole 12, transition fillet 13, positioning ring 14, rubber band 15 and sealing groove 16.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
As shown in fig. 1 to 4, the embodiment of the invention provides a graded-stiffness optical fiber towed line array vibration isolation section, wherein a single large-stiffness elastic rope in the traditional vibration isolation section is replaced by a plurality of elastic ropes with low stiffness and different length allowance, the elastic ropes are stressed sequentially during towing by designing the respective elastic rope allowance, and the stiffness of the vibration isolation section is gradually increased along with the increase of towing speed, so that the stiffness of the vibration isolation section is matched with the navigational speed, and the optimal vibration reduction and isolation effect is achieved.
The graded-rigidity optical fiber linear array vibration isolation section (hereinafter referred to as graded vibration isolation section) mainly comprises a connector 1, a bearing piece 2, an elastic rope, a supporting component 6, a sheath 7, an optical cable 8 and a filler 9; the sheath 7 is of a tubular structure, and two ends of the sheath are respectively provided with a connector 1 so as to realize the sealing of the sheath; the bearing piece 2, the elastic rope and the supporting component 6 are all arranged in the sheath 7; the bearing piece 2 is connected with the connector 1, a plurality of rope penetrating holes are designed on the bearing piece 2, a plurality of elastic ropes are uniformly distributed between the two bearing pieces after passing through the rope penetrating holes, and each elastic rope is provided with different length allowance according to rigidity requirements. In this embodiment, four groups of elastic rope assemblies including an elastic rope A3, an elastic rope B4, and an elastic rope C5 are provided. The supporting components are penetrated on the plurality of elastic ropes and fixed with the shortest elastic rope (the shortest elastic rope in the embodiment is an elastic rope A3), and the rest elastic ropes are uniformly distributed among the supporting components; the optical cable is arranged in the sheath and penetrates through the through hole in the middle of the supporting component, and two ends of the optical cable are respectively connected with the head-to-tail connectors; and filling agents are injected into the residual space in the sheath so as to improve the hydrostatic resistance of the vibration isolation section and realize neutral buoyancy. The vibration isolation sections are connected with the acoustic array section or the towing rope in front and back to realize the vibration reduction and isolation function.
The grading vibration isolation section adopts a plurality of low-rigidity elastic ropes as main vibration reduction and isolation elements, and the length allowance of each elastic rope is reserved according to the working navigational speed. Dividing the working speed into n regions, wherein the nth speed interval corresponds to the 1 st to n thThe elastic rope works. Setting the maximum working tension in each navigational speed area as F n The rigidity of the ropes is K respectively 1 、K 2 ……K n The rigidity of the sheath is K, the 1 st elastic rope is the reference length L, and the length allowance epsilon of the nth elastic rope n The method comprises the following steps:
in the above technical scheme, referring to fig. 2, one end of the bearing member 2 is provided with a vertical rope penetrating hole 11 and a transverse rope penetrating hole 12 in two directions, and the two rope penetrating holes are oblong and can penetrate into a plurality of elastic ropes simultaneously. In order to avoid the fracture of the elasticity 3 caused by shearing force, the peripheries of the vertical rope threading holes 11 and the transverse rope threading holes 12 are provided with transition fillets 13, and the connection part of the transition fillets 13 and the bearing piece 2 is in smooth transition; in this embodiment, the upper and lower groups of elastic rope assemblies pass through the vertical rope threading holes 11, and the left and right groups of elastic rope assemblies pass through the transverse rope threading holes 12.
In the above technical scheme, referring to fig. 3, the supporting component 6 is structured, where multiple groups of round holes are formed in the supporting component to fix the elastic rope, a positioning ring 14 is installed on the elastic rope A3 with the shortest length (the common structure is that the positioning ring is perforated and the binding belt is perforated to be fixed), so that the supporting component is prevented from moving along the elastic rope, and after the elastic rope B4 and the elastic rope C5 intercept the length according to the design allowance, the elastic rope is fastened and fixed by a rubber band 15.
In order to further improve the stability of the vibration isolation section, oil or rubber filler 5 with lower damping is injected into the residual space in the sheath 7, and the main purpose is to enable the outside Zhou Pinghua of the sheath 7 to reduce the influence of fluid, particularly water flow, on the sheath 7. As shown in fig. 4, in order to improve the sealing performance, a plurality of annular sealing grooves 11 are formed at the sealing positions of the connector 1 and the sheath 7, and the sheath 7 is tightly pressed by a pressing ring 10 at the sealing groove 16 to realize sealing.
To further enhance the performance of the present vibration isolation section, the sheath 7 is made of a soft viscoelastic material to increase the attenuation factor and enhance the absorption and attenuation capabilities of the sheath 7 to drag noise.
In addition, to ensure that the vibration isolation section is not damaged under the limit tensionBad, the rigidity K of each elastic rope needs to be tested 1 、K 2 ……K n The allowance of the elastic rope is ensured to be larger than the elongation of the spacing array section under the limit tensile force.
According to the invention, a sample section is developed to carry out a lake drag test, and the result shows that the vibration isolation section has a good suppression effect on drag noise of an optical fiber drag line array. The vibration isolation section is based on the existing mature technology, is simple to manufacture and high in reliability, and has important application values in military and civil.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a hierarchical rigidity optic fibre wire-wound array vibration isolation section which characterized in that: comprises a connector, a bearing piece, an elastic rope, a supporting component, a sheath, an optical cable and a filler;
the sheath is of a tubular structure, and two ends of the sheath are respectively provided with a connector so as to realize the sealing of the sheath;
the bearing piece, the elastic rope and the supporting component are all arranged in the sheath; the bearing pieces are connected with the connector, a plurality of rope penetrating holes are formed in the bearing pieces, a plurality of elastic ropes are uniformly arranged between the two bearing pieces after passing through the rope penetrating holes, and each elastic rope is provided with different length allowance according to the rigidity requirement;
the support assemblies are penetrated on the plurality of elastic ropes and fixed with the shortest elastic rope, and the rest elastic ropes are uniformly distributed among the support assemblies; the optical cable is arranged in the sheath and penetrates through the supporting component, and two ends of the optical cable are respectively connected with the head-to-tail connectors;
and filling agents are injected into the residual space in the sheath so as to improve the hydrostatic resistance of the vibration isolation section and realize neutral buoyancy.
2. The staged stiffness of claim 1The optical fiber towed linear array vibration isolation section is characterized in that: the elastic ropes are a plurality of low-rigidity elastic ropes, the length allowance of each elastic rope is reserved according to the working navigational speed, the working navigational speed is divided into n areas, the nth navigational speed interval corresponds to the 1 st to nth elastic ropes to work, and the maximum working tension in each navigational speed area is set as F n The rigidity of the ropes is K respectively 1 、K 2 ……K n The rigidity of the sheath is K, the 1 st elastic rope is the reference length L, and the length allowance epsilon of the nth elastic rope n The method comprises the following steps:
3. the graded stiffness fiber optic haul linear array vibration isolation segment of claim 1, wherein: the bearing piece one end is equipped with two direction reeving holes in horizontal and vertical, and perpendicular reeving hole and crossing the rope hole shape are oblong, enable to penetrate many elastic ropes simultaneously, and the transition fillet is opened around the reeving hole, and transition fillet and bearing piece junction part smooth transition.
4. The graded stiffness fiber optic haul linear array vibration isolation segment of claim 1, wherein: the supporting component is provided with a plurality of groups of round holes for threading the elastic ropes, the elastic ropes with the shortest length are provided with positioning rings, the supporting component is prevented from shifting along the elastic ropes, and after the length of the rest elastic ropes is intercepted according to the design allowance, the rest elastic ropes are fastened and fixed by rubber bands.
5. The graded stiffness fiber optic haul linear array vibration isolation segment of claim 1, wherein: the filler is solid gum or silicone oil.
6. The graded stiffness fiber optic haul linear array vibration isolation segment of claim 1, wherein: the sheath is made of soft viscoelastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311608412.9A CN117705260A (en) | 2023-11-29 | 2023-11-29 | Graded-rigidity optical fiber towed linear array vibration isolation section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311608412.9A CN117705260A (en) | 2023-11-29 | 2023-11-29 | Graded-rigidity optical fiber towed linear array vibration isolation section |
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| Publication Number | Publication Date |
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| CN117705260A true CN117705260A (en) | 2024-03-15 |
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| CN202311608412.9A Pending CN117705260A (en) | 2023-11-29 | 2023-11-29 | Graded-rigidity optical fiber towed linear array vibration isolation section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118408003A (en) * | 2024-07-01 | 2024-07-30 | 之江实验室 | Vibration isolation section and underwater detection system |
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2023
- 2023-11-29 CN CN202311608412.9A patent/CN117705260A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118408003A (en) * | 2024-07-01 | 2024-07-30 | 之江实验室 | Vibration isolation section and underwater detection system |
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