Damping material is a kind of material which transforms the vibration energy of solid machinery into heat energy and dissipates it. It is mainly used for vibration and noise control.

Damping effect is often encountered in daily life, such as car, motorcycle shock absorber (used to attenuate the resonance phenomenon of spring, reduce bumps), car interior soft decoration (attenuation and absorption of noise in the car), etc. There are also damping phenomena, such as Q-value adjustment of LC circuit.

For submarines, damping materials can be divided into two categories: one is the noise damping tile covered outside the submarine (shark skin material in China), the other is the noise damping isolation material inside the submarine, such as the engine and the hull to avoid rigid connection, using damping shock absorbers or floating rafts - these are damping materials. With the development of anti submarine technology, many countries are forced to make full use of the technology to reduce submarine noise Husband. Because submarines have been sailing in the deep sea for a long time, they not only have to face the complex marine environment but also reduce the possibility of being discovered, which requires reducing noise. Therefore, noise is one of the important indicators to measure a submarine.