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Sonar dome design and production require considerable knowledge and experience in the field due to the complexity of the technical solution that requires the optimization of the interdependent design parameters.
BG-ENDUSTRI; has been continuously investing in human resources and equipment for developing sonar dome technologies since the year 2007. These investments have paid off by enabling the development and production of sonar domes capable of serving at wide frequency ranges inclusive of high frequencies which are mandatory for mine hunting applications. BG-ENDUSTRI Sonar Domes have been succesfully serving on the MİLGEM Corvettes, Engin Class Mine Hunters and New Type Patrol Boats of the Turkish Naval Forces. One of the principal aims of BG-ENDUSTRI is to supply the sonar dome needs of the world navies with its technological capabilities and considerable experience in the field.
Sonar is a device which consists of a transducer; a transmitter and a receiver. Simply, electrical impulse from the transmitter is converted into a sound wave (where electrical energy is converted into acoustical energy) by the transducer and sent into the water. When this wave strikes an object, it rebounds. This echo strikes the transducer, which converts it back into an electric signal. This signal is then amplified by the amplifier and sent to a human interface. Modern sonar utilizes acoustical energy for underwater communication, navigation or detection of submerged objects.
A sonar dome is an underwater structure mounted to a marine vessel, generally at or near the bow of the vessel. Sonar dome houses sonar transducers and is flooded to acoustically couple the transducers with the surrounding sea. The purpose of sonar dome is to protect sonar transducers from mechanical forces exerted by the seawater through which the vessel moves, to protect the transducers from damage caused by the contact with objects such as piers, and to reduce the self-noise that would otherwise be generated by turbulent water flow past the transducers.
STEEL SONAR DOMES:
– Exhibit good mechanical strength but also exhibit significant difference in characteristic impedance from the sea water thus they show low acoustical transparency,
– In time, due to high slamming loads, they are prone to suffer from permanent local deformations which negatively affect the smooth flow of water around the dome. Turbulence results in additional noise around the dome,
– Exhibit poor corrosion resistance against sea water,
– Require frequent maintenance for corrosion protection which incurs additional costs.
RUBBER DOMES:
– Have their characteristic impedance closely aligned with that of sea water which results in good acoustical transparency,
– However, exhibit poor mechanical strength, they have to be reinforced and pressurized,
– Require special and expensive manufacturing investment,
– Generally on site repair is not possible,
– Short service life due to deterioration of the material in time.
FRP COMPOSITE SONAR DOMES:
– Far better acoustical performance (under the condition of an adequate design and application of an adequate production technology),
– High strength to weight ratio,
– No plastic deformation under stress,
– Fatigue and impact resistance,
– Reduction in additional noise and vibration,
– Low resonance,
– Corrosion proof,
– Good characteristic impedance,
– Long service life,
– Elimination of constant need for surface treatment and repairing,
– On site repairing is generally possible.
The outstanding features of the Sonar Domes which are developed and produced by BG-ENDUSTRI are as follows:
The MILGEM Sonar Dome has been developed and produced by BG-ENDUSTRI to be utilized on MILGEM Corvettes which have been designed and built for anti-submarine warfare and patrol missions.
In order to meet the demanding structural strength and acoustical performance requirements nano-enhanced Fiber Reinforced Polymer (FRP) Composite materials have been exploited as the construction material.
The Engin Sonar Dome has been developed and produced by BG-ENDUSTRI to be utilized on Engin Class Mine Hunters in service within the Turkish Naval Forces Inventory.
The sonar dome has proved its success with its exceptional performance passing an extensive functional test program carried out by the Turkish Naval Forces.
In order to meet the demanding acoustical performance and structural strength requirements nano-enhanced Fiber Reinforced Polymer (FRP) Composite materials have been exploited as the construction material.
All acoustical research and development activities have been carried out at the BG-ENDUSTRI Underwater Acoustics Laboratory.
In order to meet the demanding acoustical performance and structural strength requirements nano-enhanced Fiber Reinforced Polymer (FRP) Composite materials have been exploited as the construction material.
All acoustical research and development activities have been carried out at the BG-ENDUSTRI Underwater Acoustics Laboratory.
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