DK155362B

DK155362B - SUBJECT VESSEL

Info

Publication number: DK155362B
Application number: DK420784A
Authority: DK
Inventors: Egidius Arens
Original assignee: Krupp Gmbh
Priority date: 1983-09-10
Filing date: 1984-09-03
Publication date: 1989-04-03
Also published as: DE3332754C2; GB8422597D0; DK420784A; NO155045B; NO843497L; DE3332754A1; GB2146295A; AU3272784A; AU564071B2; DK155362C; NO155045C; GB2146295B; DK420784D0

Description

iin

DK 155362 BDK 155362 B

Opfindelsen angår et undervandsfartøj, især en strategisk undervandsbåd, af den i krav 1's indledning angivne art.The invention relates to a submarine, in particular a strategic submarine, of the type specified in the preamble of claim 1.

Ved hjælp af de moderne med ultralyd arbejdende meget effektive lokaliseringsanlæg, der arbejder med lave sendefrekvenser -5 de såkaldte lavfrekvens-aktiv-sonarer - lokaliseres sådanne undervandsbåde allerede over meget store afstande. Rækkevidden af disse lavfrekvens-aktiv-sonarer er for det meste større end undervandsbådens maksimale kampafstand, ved hvilken torpedoer kan affyres med tilstrækkelig god træfsikkerhed. Dette betyder, at undervandsbåden for at 10 kunne angribe skal trænge ind i milskibets overvågningsområde og derved udsættes for ekstrem stor fare.With the help of the modern, highly ultrasonically operated locating systems that work with low transmission frequencies -5 the so-called low-frequency active sonar - such submarines are already located over very large distances. The range of these low-frequency active sonar is mostly greater than the submarine's maximum combat distance, at which torpedoes can be fired with sufficient accuracy. This means that in order for 10 submarines to attack, the submarine must penetrate into the monitoring ship's monitoring area and thereby be exposed to extreme danger.

Formålet med opfindelsen er at forbedre et undervandsfartøj af den indledningsvis nævnte art på en sidan mide, at det under kampindsats med betydelig mindre risiko for at blive sporet på et for 15 tidligt tidspunkt kan gå ind på kampafstand fra et med en lavfre-kvens-aktiv-sonar udrustet målskib.The object of the invention is to improve a submarine of the type mentioned in the introduction on the one hand mite that during combat efforts with considerably less risk of being tracked at a premature time it can enter the combat distance from one with a low-frequency asset. -sonar equipped target ship.

Ved et undervandsfartøj af den i krav 1's indledning nævnte art løses denne opgave ifølge opfindelsen ved hjælp af de i krav 1's kendetegnende del angivne ejendommeligheder.In the case of a submarine of the type mentioned in the preamble of claim 1, this task according to the invention is solved by means of the features stated in the characterizing part of claim 1.

20 Ved hjælp af de på de angivne sektioner af undervandsfar tøjet anbragte lydabsorberingselementer ifølge opfindelsen reduceres målstørrelsen af undervandsfartøjet, der nærmer sig målskibet, betydeligt. Ved en gunstig anbringelse af lydabsorberingselementerne kan der opnås en reduktion af målstørrelsen på ca. 10-15 dB, således at 25 den målstørrelse, som undervandsfartøjet under angreb frembyder for et målskibs aktiv-sonar, kun andrager ca. 0 til -5 dB. Dette betyder, at rækkevidden af aktiv-sonaren til sporing af undervandsfartøjet ifølge opfindelsen ved begrænsning af rækkevidden på grund af efterklang til 1/10 - 1/30 og ved begrænsning af rækkevidden på 30 grund af støjniveau nedsættes til ca. det halve af rækkevidden til sporing af sædvanlige undervandsbåde med en målstørrelse på ca. 10 dB. Undervandsfartøjet ifølge opfindelsen kan derfor uden risiko bevæge sig tilsvarende nærmere mod målskibet, og med denne ringere risiko for at forråde sig selv er muligheden for ødelæggelse af målet 35 forøget.By means of the sound-absorbing elements according to the invention arranged on the indicated sections of the submarine vessel, the target size of the submarine approaching the target ship is significantly reduced. By a favorable placement of the sound absorbing elements, a reduction of the target size of approx. 10-15 dB, so that the target size that the submarine offers during attack for a target ship's active sonar is only approx. 0 to -5 dB. This means that the range of the active sonar for tracking the submarine according to the invention by limiting the range due to reverberation to 1/10 - 1/30 and by limiting the range due to noise level is reduced to approx. half the range for tracking conventional submarines with a target size of approx. 10 dB. The submarine according to the invention can therefore move correspondingly closer to the target ship without risk, and with this lower risk of betraying itself, the possibility of destroying the target 35 is increased.

Dæklegemerne ifølge opfindelsen på bov- og tårnsektionen tjener dels til fastgørelse af lydabsorberingselementerne og dels til som følge af deres formgivning at undgå en forøgelse af skibsskrogets og tårnets strømningsmodstand, som følge af de lydabsorberende 2The deck bodies according to the invention on the bow and tower section serve partly to fasten the sound-absorbing elements and partly to avoid an increase in the flow resistance of the ship's hull and tower as a result of their design, due to the sound-absorbing 2

DK 155362 BDK 155362 B

Krav 2 angiver en fordelagtig udførelsesform for opfindelsen. De bredbindede kileabsorberingselementer dækker et stort frekvensområde af lavfrekvens-aktiv-sonarers mulige sendefrekvenser, således at undervandsfartøjet ifølge opfindelsen heller ikke kan spores 5 i større afstand ved hjælp af ændringer af sendefrekvensen.Claim 2 indicates an advantageous embodiment of the invention. The wide-bonded wedge absorbing elements cover a large frequency range of possible transmission frequencies of low-frequency active sonar, so that the submarine according to the invention can also not be tracked at a greater distance by means of changes in the transmission frequency.

I krav 3 angives yderligere en fordelagtig udførelsesform for opfindelsen. Polyurethan har vist sig at være velegnet som materiale for dæklegemer for sonarbaser både på grund af dets mekaniske styrke og på grund af dets akustiske egenskaber. Polyurethan kan 10 derfor med de samme fordele anvendes som materiale til beklædning af undervandsfartøjets bov og tårn.Claim 3 further states an advantageous embodiment of the invention. Polyurethane has proven to be suitable as a material for cover bodies for sonar bases both because of its mechanical strength and because of its acoustic properties. Polyurethane can therefore be used with the same advantages as a material for cladding the bow and tower of the submarine.

Opfindelsen forklares nærmere i det følgende under henvisning til et på tegningen anskueiiggjort udførelseseksempel. På tegningen viser skematisk: 15 fig. 1 et perspektivisk billede af en undervandsbåd, fig. 2 et længdesnit gennem boven af den i fig. 1 viste undervandsbåd, og fig. 3 et længdesnit gennem den forreste tårnsektion af den i fig. 1 viste undervandsbåd.The invention is explained in more detail below with reference to an exemplary embodiment illustrated in the drawing. The drawing shows schematically: fig. 1 is a perspective view of a submarine, FIG. 2 is a longitudinal section through the bow of the device shown in FIG. 1, and FIG. 3 is a longitudinal section through the front tower section of the device shown in FIG. 1 submarine.

20 Den i fig. 1 skematisk viste undervandsbåd har et lang strakt skibsskrog 10 og et fra dette opadragende indstigningstårn 11. Skibsskroget 10's bov 12 og den mod boven 12 vendende tårnsektion 13 er hver dækket med et dæklegeme 14 henholdsvis 15. Det i sin form efter konturen af henholdsvis skibsskroget 10 og indstignings-25 tårnet 11 tilpassede dæklegeme 14,15 dækker lydabsorberingselementer 16,17, der er fastgjort til henholdsvis boven 12 og tårnområdet 13. Mellemrummene 18,19 mellem lydabsorberingselementerne 16,17 og dæklegemerne 14,15 er fyldt med vand, hvilket hensigtsmæssigt sker ved hjælp af ikke nærmere viste kanaler i dæklegemerne 14,15, når 30 undervandsbåden dykker.The device shown in FIG. 1 schematically shows submarine has a long stretched ship hull 10 and one from this ascending tower 11. The hull 12 of the ship hull 10 and the tower section 13 facing the bow 12 are each covered with a deck body 14 and 15, respectively. and the accessing tower 11 adapted cover body 14,15 covers sound absorbing elements 16,17 attached to the arch 12 and the tower area 13, respectively. The spaces 18,19 between the sound absorbing elements 16,17 and the cover bodies 14,15 are filled with water, which conveniently by means of channels not shown in more detail in the deck bodies 14,15 when the submarine dives.

Lydabsorberingselementerne 16,17 er udformede som bred-båndede kileabsorberingselementer. Dæklegemerne 14,15 er fremstillede af et formstofmateriale, der har i det væsentlige samme akustiske egenskaber som vand. Polyurethan har vist sig at være velegnet som 35 et sådant formstof.The sound absorbing elements 16,17 are designed as wide-band wedge absorbing elements. The cover bodies 14,15 are made of a plastic material which has substantially the same acoustic properties as water. Polyurethane has been found to be suitable as such a plastic.

Som skematisk antydet i fig. 2 har dæklegemet 14 ved boven 12 af skibsskroget 10 en åbning 20. Undervandsbådens torpedorør, der af hensyn til overskueligheden ikke er vist, er ført gennem denne åbning 20. En lignende åbning kan være udformet til en * ov/antiιαΙ i i mriam/anrleharlon anhr*a^t ff*nntcnnarc KacicAs schematically indicated in FIG. 2, the deck body 14 at the bow 12 of the hull 10 has an opening 20. The torpedo tube of the submarine, which is not shown for the sake of clarity, is passed through this opening 20. A similar opening may be formed for an * ov / antiιαΙ ii mriam / anrleharlon anhr * a ^ t ff * nntcnnarc Kacic

Claims

Submarine, in particular strategic submarine, with an elongated hull and a rising tower rising from it, 5 characterized in that sound-absorbing elements (16,17) are arranged on the bow (12) of the hull (10) and on the bow (12) area (13) of the tower (11), which sound-absorbing elements (16 and 17, respectively) are covered by a deck body adapted to the contour of the hull (10) and the entry tower (11), respectively (14 and 15, respectively).

Submarine according to Claim 1, characterized in that the sound-absorbing elements (16, 17) are designed as wide-band wedge absorbers.

Submarine according to Claim 1 or 2, characterized in that the cover bodies (14, 15) consist of plastic with substantially the same acoustic properties as water, and preferably of polyurethane.

Submarine according to any one of claims 1-3, characterized in that the inner space 20 (18,19) of the cover bodies (14,15) is filled with water.

Submarine according to any one of claims 1-4, characterized in that at least one opening (20) is formed in the hull body (14) for carrying a torpedo tube and / or a receiving base of a sonar system. 25 1 35