Underwater sandwich sound insulation structure based on foam super-structure surface

Abstract

The invention provides an underwater sandwich sound insulation structure based on a foam super-structure surface. The underwater sandwich sound insulation structure comprises a sound source side surface sound insulation layer, a sound source side vibration reduction layer, a sound insulation side surface sound insulation layer, a sound insulation side vibration reduction layer and a foam super-structure surface layer. The foam superstructure surface layer comprises a plurality of foam block units; the foam block units are periodically arranged according to a set rule; for n foam block modules included in the foam block unit, the set height of an insertion plate of each foam block module, the length of the insertion plate and whether the insertion plate is installed are designed, then the surface phase of each foam block module is adjusted, and regulation and control over the sound wave phase within the range of 0-pi are achieved. According to the underwater sandwich sound insulation structure based on the foam super-structure surface, the weight, the thickness and the sound insulation effect of the sound insulation structure are considered, and on the premise that the structural strength is guaranteed, the excellent broadband sound insulation effect and the excellent vibration reduction effect are achieved with the small mass, the small thickness and the lower manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of sound insulation and noise reduction, and in particular relates to an underwater sandwich sound insulation structure based on a foam superstructure surface. Background technique [0002] Radiation noise is one of the main performances to measure the combat effectiveness and survivability of underwater vehicles such as ships and torpedoes. At the same time, it also brings serious harm to the operation of fishing boats, passenger ships and the marine environment. Taking ships and submarines as examples, power machinery noise and propellers are the main sources of underwater noise. Ship noise is related to navigation safety and has a serious impact on the health and comfort of crew and passengers; submarine noise will directly cause the exposure of one's own targets and interfere with the normal detection of sonar. Therefore, controlling underwater radiated noise is of great significance to all kinds of und...

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Problems solved by technology

[0004] The traditional enclosure structure uses single-layer steel plate reinforcement, and lays sound-absorbing materials and damping materials on its surface. This method has high time cost, poor fireproof and weight characteristics, wide structure thickness, narrow sound insulation frequency band, and sound insulation performance varies with time. Water pressure increases and becomes worse

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