As it is an anomalous noise, its components must generally be discrete spectrum. The following research is carried out under different working conditions:
First, measure the noise spectrum of the wind turbine and determine its nature in advance. noise (whether from wind turbine blades, generator, transmission components, or others)
Test for vibrations at the hull and other locations to further confirm the nature of the sound source.
If possible, perform a correlation analysis between noise and vibration. At this point, the approximate location of the sound source can usually be determined.
If further positioning is required, more detailed research into the nature of the noise source is required. The method is relatively flexible and will not be developed further.
Due to technical limitations, carbon fiber composite materialse have not been widely used in mass applications. However, through the continued efforts of domestic researchers, carbon fiber can currently be used in manufacturing applications in the following fields:< /p>
1. Aerospace
Carbon fiber is an essential strategic base material for advanced weapons and equipment such as rockets, satellites, missiles, fighter jets and ships. Applying carbon fiber composite materials to the body and engine casing of strategic missiles can significantly reduce weight and improve the range and assault capability of the missile. For example, the three-stage casings of intercontinental missiles developed by the United States in the 1980s are all made from carbon fiber and epoxy resin composite materials.
2. Automotive materials
Carbon fiber materials are also devenus a material favored by automobile manufacturers and began to be widely used in the interior and exterior decoration of automobiles. As an automotive material, the biggest advantages of carbon fiber are its light weight and high strength. Its weight is only 20-30% of that of steel, but its hardness is more than 10 times that of steel. Therefore, the use of carbon fiber materials in automobile manufacturing can achieve breakthroughs in automobile lightweighting and bring social benefits in energy saving.
3. Sporting Goods
Carbon fiber is used in the field of sports and leisure, such as clubs, fishing rods, tennis rackets, badminton rackets, bicycles, poles skis, snowboards, windsurfing masts, sports equipment such as marine hulls are one of the main usersof carbon fiber.
4. Wind turbine blades
Carbon fiber also has broad application prospects in new energy fields such as wind power, nuclear power and solar power. When the power of the wind turbine exceeds 3 MW and the blade length exceeds 40 meters, the performance of traditional fiberglass composite materials has reached its limits, and the use of carbon fiber composite materials to make blades is a necessary choice. Only carbon fiber makes it possible to reduce the weight of the blades while meeting resistance and rigidity requirements.
5. Civil construction
Carbon fiber is also used in the reinforcement of industrial and civil buildings, railways, highways, bridges, tunnels, chimneys, tower structures, etc. In railway construction, large-scale Top systems and soundproof wallsized will have good applications in the future, and they will also be promising applications of carbon fiber.