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How to demonstrate the noise reduction performance of the shell of the color steel plate box type su

source：www.gusiapp.cn  |  Release time：2025年10月20日
       The noise reduction performance of the shell of the color steel plate box type substation is mainly achieved through three core methods: structural design optimization, application of noise reducing materials, and gap sealing treatment. It can effectively weaken the noise generated by internal equipment (such as transformers and reactors) in the substation and meet the noise control requirements of different scenarios.
1. Multi layer composite structure: constructing a "noise barrier"
       The composite structure of the shell is the basis for reducing noise, and through the combination of different materials, it achieves dual noise reduction of "reflection+absorption".
       Outer color steel plate: galvanized color steel plate with a thickness of 0.8-1.2mm is used, with a smooth surface and high hardness, which can directly reflect some noise (especially high-frequency noise), reducing the initial energy of noise penetrating the shell; At the same time, the rigid structure of the color steel plate can avoid secondary noise caused by its own vibration.
       Intermediate noise reduction layer: The core noise reduction component is usually filled with rock wool, glass wool, or polyurethane soundproofing cotton (thickness 50-100mm). This type of porous material can absorb noise (especially mid frequency noise) through its internal pores, converting sound energy into heat energy for consumption. The sound absorption rate can reach 0.7-0.9 (the higher the value, the better the sound absorption effect), significantly reducing the amount of noise penetration.
       Inner damping layer/lining plate: Some shells will add damping plates or perforated sound-absorbing plates on the inner side. Damping plates can prevent the vibration of the shell steel plate (reduce structural sound transmission), while perforated plates can further absorb low-frequency noise that has not been treated by the middle layer, forming a "multi-layer collaborative noise reduction" effect.
2. Equipment installation and internal layout: reduce "noise source transmission"
       The noise reduction performance of the shell not only depends on its own structure, but also reduces noise transmission from the source to the outside by optimizing the installation method of internal equipment.
       Equipment shock absorption installation: The main noise sources inside the substation, such as transformers and fans, will transmit sound directly through the base and shell. Special shock-absorbing supports (such as rubber shock-absorbing pads and spring shock absorbers) will be reserved during the design of the casing, allowing for a "soft connection" between the equipment and the casing, blocking the transmission of vibration and noise through the structure to the casing, and reducing structural sound transmission noise by 15-25dB.
      Internal soundproof partition: Separate high noise equipment (such as transformers) and low-noise control units (such as distribution cabinets) in different compartments, and use soundproof panels to isolate the compartments, avoiding internal noise from overlapping and spreading through the shell, further improving the overall noise reduction effect.
3. Gap and opening sealing: block the "noise leakage channel"
      The gaps in the shell, doors and windows, and ventilation openings are the main weak points of noise leakage, which need to be addressed through targeted sealing design.
      Gap sealing treatment: The color steel plate joint of the shell and the joint between the door panel and the box body will be filled with EPDM sealing strips or foam sealant to ensure a tight seal and prevent noise leakage from the joint gap; Part of the shell will also add soundproof washers at the bolted connection points to reduce vibration noise caused by metal contact.
      Ventilation noise reduction design: The substation requires ventilation and heat dissipation, and the ventilation openings will use "soundproof louvers" or "impedance composite mufflers". The blades of the soundproof louvers have a tilted porous structure that can absorb noise; The muffler uses internal partitions and sound-absorbing materials to ensure ventilation while reducing airborne noise, resulting in a 20-30 dB reduction in ventilation noise leakage.
      Optimization of sound insulation for doors and windows: Double layer insulated glass (filled with inert gas in the middle) or soundproof door panels are used for maintenance doors and observation windows. The glass edges are fixed with sealing strips, and the interior of the door panels is filled with sound-absorbing materials to ensure that the sound insulation performance of the doors and windows is consistent with that of the main body shell, with no obvious noise leakage points.
4. Quantification of noise reduction effect: meets scene noise standards
      Through the above design, the noise reduction performance of the color steel plate box type substation shell can be quantified and meet the requirements of different installation environments.
      Conventional scenario: Installed on the outer shell of ordinary residential and commercial areas, the noise reduction can reach 25-35dB, so that the external noise during the operation of the substation is controlled below 55dB (in accordance with the daytime requirements of the "Industrial Enterprise Boundary Environmental Noise Emission Standard"), avoiding affecting the lives of surrounding residents.
      Sensitive scenarios: The shell installed near schools and hospitals can increase noise reduction to 35-45dB by thickening the sound-absorbing layer and upgrading the shock absorption device. External noise can be controlled below 50dB to meet higher noise control standards.