RU169196U1 - TOWABLE PART OF AN ACTIVE-PASSIVE HYDROACOUSTIC STATION - Google Patents

Abstract

The utility model relates to the field of hydroacoustics and can be used in hydroacoustic stations of surface ships, as well as research vessels and environmental control vessels. A towed part (BC) of a hydroacoustic station for a surface ship (SC) is proposed, containing a flexible long towed antenna (GPBA) , a linear low-frequency radiating antenna (NIA), consisting of electro-acoustic transducers, each of which is sealed to ensure sound transparency and a tow cable. The linear acoustic NIA electroacoustic transducers are housed in a single soundproof transparent hose filled with a gel-like filler, the low-frequency emitting antenna hose shell is sealed by bulkheads into successively alternating active acoustic modules filled with a gel-like filler and containing electroacoustic transducers, and passive acoustic modules filled with a low-density working fluid this reduces the noise and vibration of the warhead during the towing of the NK.

Description

The utility model relates to the field of hydroacoustics and can be used in sonar stations of surface ships and submarines, as well as research vessels and environmental control vessels.

Known active-passive sonar stations (HAS) with flexible extended towed antennas (GPAA) for a submarine (PL) (GAS with GPBA for PL) and for a surface ship (NK) (GAS with GPBA for NK) [1,2], which include:

- a set of airborne (analog and digital) parts placed on the carrier object;

- a setting-sampling device (UPV) or a lowering-lifting device (SPU), with which the towed part of the station is moved from the transport position to the working position and vice versa (setting-selection process);

- towed part of the GAS (BS GAS), in the transport position, located on board the carrier object, and in the working position behind its stern. The composition of the warhead GAS includes the GPAA, which has zero buoyancy, provides reception of signals in the modes of sonar (GL) and noise direction finding (SHP), a low-frequency radiating antenna (NIA) and a floating cable or cable - a tug that provides towing of the GPAA and NIA at a distance from the object carrier, the transmission of received GPBA signals on board the carrier object and the excitation signals of the radiating antenna from the carrier object to the NIA.

Known warhead active-passive HAS, containing GPA, NIA, consisting of an electro-acoustic transducer located in a sound-translucent carrier filled with sound-conducting liquid towed carrier (BN), cable-tow [3].

The disadvantage of the known warhead active-passive ASG is the need to find on the NK of the manipulator, ensuring the capture of the BN and its movement in the process of lowering and raising the BN.

The manipulator is a complex, massive and very expensive device, which occupies up to 40% of the total control system mass [4, 5], which makes it difficult to place a GAS with GPBA for a NK with a known warhead GAS on objects - carriers of small and medium displacement.

The active active-passive HAS for NK free from the indicated drawback containing GPAA, linear NIA, consisting of N electro-acoustic transducers, each of which is sealed with sound transparency by placing in its own separate sealed translucent enclosure filled with sound-conducting liquid and a tow cable [6] .

The sealed enclosures in which the electro-acoustic transducers of the low-frequency radiating antenna are located are interconnected by cables providing transit of electrical signals, while the cable diameter is less than the diameter of the sealed enclosure.

To carry out the descent - lift operations of a known warhead of an active-passive GAS for a NK, a manipulator is not required, since there is no BN in the warhead of a GAS and, therefore, there is no need for its capture and movement. The operation can be carried out using only a ship’s winch, which dramatically reduces the overall dimensions of the SPU, its power consumption and cost.

The disadvantages of the known warhead GAS for NK [6]. there is the presence of noise and vibration during towing of the HAS HAS caused by the flow around the bodies of electro-acoustic transducers connected by cables with a diameter less than the diameter of the bodies. The difference in diameters at the junction of the cable and the transducers causes turbulent eddies during flow around the NIA during the towing process, which in turn are sources of hydrodynamic noise and vibration, which interfere with the operation of the GPAA.

Known warhead active-passive HAS for NK, containing GPAA, linear NIA, consisting of electro-acoustic transducers, each of which is sealed to ensure sound transparency, and the cable is a tug, while the electro-acoustic transducers of a linear low-frequency radiating antenna are placed in a soundproof hose filled with a gel filler , and are made longitudinally bending. GPA and the hose shell, in which the emitters of linear NIA are placed, can have equal external diameters [7].

In this case, the noise flow around and the vibrations of the warhead GAS are minimal.

Known warhead active-passive GAS for NK is the closest to the proposed set of technical features and, therefore, taken as a prototype.

A disadvantage of the well-known GAS HAS for NK, adopted as a prototype, is the negative buoyancy of the low-frequency radiating antenna, which makes it difficult to operate without introducing special measures - correcting the directivity or creating hydrodynamic adjustable ailerons, and leads to a decrease in noise immunity.

The disadvantage is due to the fact that despite the fact that the longitudinal-bending converters can provide a low operating frequency and the required radiation power with a diameter not exceeding the diameter of the GPBA, they have a significant mass.

Thus, a longitudinal-bending transducer to an operating frequency of f = 1500 Hz, which has a sensitivity in the radiation mode of γ = 1.6 Pa m / V, has a diameter of 52 mm, a height of 134 mm, and a mass of 1 kg [8].

The objective of the utility model is to ensure zero buoyancy NIA, which is part of the warhead GAS.

The technical result of the proposed device is towing warhead GAS in a horizontal position, which is especially important for submarines, as it leads to increased noise immunity and a decrease in the level of intrinsic interference.

и длина пассивного модуля

определяются из соотношения:To achieve the specified technical result in a warhead GAS for NK, containing a GPAA with zero buoyancy, a linear NIA, consisting of electro-acoustic transducers, each of which is sealed to ensure sound transparency, and a tug cable, while the electro-acoustic transducers of a linear low-frequency radiating antenna are placed in a hose a sound-transparent shell filled with a gel-like filler, and made longitudinally curved, and GPBA and a hose shell in which emitters are placed NIA, have equal diameters, new features are introduced, namely: the NIA hose shell is sealed by bulkheads into successively alternating active acoustic modules filled with a gel-like filler and containing electroacoustic transducers, and passive acoustic modules filled with a low-density working fluid (solid, liquid gas or a combination thereof), while the length of the active module

and the length of the passive module

are determined from the relation:

where ρ _act is the average density of the active module;

ρ _pass is the average density of the passive module;

ρ _in - the density of water.

Best results are achieved if the ratio is satisfied

where λ is the radiation wavelength.

As is known [9], the fulfillment of condition (2) ensures that there is no additional maximum equal to the main maximum in the directivity of the linear discrete antenna.

The technical result is confirmed by computational modeling and direct full-scale prototyping.

The essence of the utility model is illustrated in FIG. 1 and FIG. 2, on which are shown respectively the proposed warhead GAS with GPBA, for example, for the NK in the working position overboard the surface ship and the design of the NIA.

Proposed warhead GAS 1 for NK - contains GPBA 2; linear NIA 3; cable - tow 4 (Fig. 1).

Towing warhead GAS 1 is carried out by surface ship 5 using the cable included in the warhead GAS - tug 4 and ship winch 6.

Linear NIA 3 contains a soundproof hose shell 7 divided by sealed bulkheads 8 into successively alternating active acoustic modules 9 and passive acoustic modules 10 (Fig. 2). The active acoustic module is filled with gel-like aggregate 11 and contains a longitudinal-bending transducer 12. The passive acoustic module is filled with a low-density working fluid 13.

The power to the converters 12 is supplied by cables 14. The transmission of signals GPBA; produced by the transit wires 15, for example, fiber optic. Sealed end connectors 16, provide mechanical and electrical connection of the linear NIA 3 with GPBA 2. (Fig. 2).

The work of the proposed warhead active-passive GAS for NK is as follows.

When applying from the side of the surface ship 5 via cable - towing 4, the voltage from the multichannel signal emission path located on the NK causes the converters 12 of the linear NIA 3 to be excited in the signal emission mode, while the signal emitted by the converters 12 passes through the soundproof hose 7 into the water .

After the completion of the radiation cycle, the echo signals are received by GPBA 2 and transmitted through the wire 15 through cable tug 4 on board the NK 5.

In this case, the BSE is towed in a horizontal position, which provides increased noise immunity and a decrease in the level of intrinsic noise.

Ensuring the claimed technical result is achieved due to the fact that the separation of the hose shell by sealed bulkheads into active and passive acoustic modules while ensuring relation (1) ensures zero buoyancy of the BSE.

Information sources

1. M. Andreev, Yu. Alexandrov, S. Kozlovsky, S. Okhrimenko, I. Rubanov. Features of the development and testing of sonar stations with a flexible extended towed antenna for NK. // Marine collection, 2009, No. 8, pp. 54-56

2. RF patent for utility model No. 78053, publication December 10, 2008

3. Yu.A. Koryakin, S.A. Smirnov, G.V. Yakovlev. Ship sonar equipment. Status and Actual Problems, St. Petersburg, Nauka, 2004, pp. 188-191.

4. Yu.L. Borodin, A.F. Tsibulkin, V.A. Evgeniev, M.Ya. Andreev, R.S. Pakhomov. Creation of a hoisting device for the Minotaur-M product // Shipbuilding industry, a series Technology and organization of production. St. Petersburg, 2007, pp. 16-20.

5. M.Ya. Andreev, S.N. Okhrimenko, I.L. Rubanov. Development of a sonar station with a flexible long towed antenna to illuminate the underwater environment. // Sensors and Systems, 2008, N511, pp. 29-31.

6. Patent WO2004065985, publication. 08/05/2004

7. RF patent for utility model No. 104146, publication 05/10/2011

8. M.Ya. Andreev, B.N. Bogolyubov, V.V. Klyushin, I.L. Rubanov. Low-frequency small-sized longitudinally bending electro-acoustic transducer. // Sensors and Systems, 2010, No. 12, pp. 51-54.

9. Handbook of sonar. L., "Shipbuilding", 1982, p. 190-191

Claims (8)

1. The towed part of the active-passive hydroacoustic station, containing a flexible long towed antenna, a linear low-frequency radiating antenna, consisting of electro-acoustic transducers, each of which is sealed to ensure sound transparency, and a tug cable, while the electro-acoustic transducers of a linear low-frequency radiating antenna are placed in a hose a sound-transparent shell filled with a gel-like aggregate, their density is significantly higher than the density of water, and external meters of a flexible extended towed antenna and a hose shell, in which the linear low-frequency radiating antenna transducers are located, are equal, characterized in that the hose shell of the low-frequency radiating antenna is separated by sealed bulkheads into successively alternating active acoustic modules filled with a gel-like filler and containing electroacoustic transducers and passive acoustic modules filled with a low-density working fluid, while the length of the active module

and passive module

are determined from the relation:

, where ρ _act is the average density of the active module; ρ _pass is the average density of the passive module; ρ _in - the density of water. 2. The towed part of the sonar station under item 1, characterized in that

and

satisfy the relation

, where λ is the radiation wavelength.

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