16.12.2022, 17:42
Eine kleine Momentaufnahme zu einem eigentlich relativ bekannten Konstruktionssachverhalt, der aber dennoch immer wieder eines Blickes wert sein sollte...
Schneemann
Zitat:What are the black sections on the Type 26 Frigate hull?https://ukdefencejournal.org.uk/what-are...gate-hull/
The Type 26 Frigate is an advanced submarine-hunting vessel, and by virtue of that fact, the class needs to have a low acoustic signature.
The black sections of the hull, shown in the image above, are part of an effort to reduce the noise generated by the vessel, making her harder to detect by enemy submarines. [...]
This innovation on Type 26 helps to protect the vessel and its crew from the dangers of errant underwater noise. Submarine hunters are often forced to operate in close proximity to other vessels, both friendly and hostile, and the sound of their engines, sonar, and other machinery can be detected by sensitive underwater microphones. This can put the frigate at risk of being detected and targeted by enemy forces. To mitigate this risk, submarines and now Type 26 Frigates are equipped with an acoustic shielding system, typically known as anechoic tiling. This shielding takes the form of a thick layer of sound-absorbing material, such as rubber or other special composites, that is applied to the hull. The material is designed to absorb and dissipate the sound waves generated by the submarine’s machinery, making it much harder for enemy sensors to detect the vessel. [...]
These tiles are typically made of a porous, sponge-like material, such as rubber or foam, that is coated with a layer of metal or other reflective material. When sound waves hit the surface of an anechoic tile, they are absorbed by the porous material, preventing them from reflecting back into the environment.
Schneemann