Polygon structure composite acoustic board based on negative mass

Abstract

The invention discloses a polygon structure composite acoustic board based on the negative mass. The board comprises polygon structure layers which have the negative mass effect in the Z direction, the polygon structure layers are bonded to the two sides of an intermediate layer through bonding layers, so that an integral whole is formed, the intermediate layer is made of ethylene-vinyl acetate copolymer, silicone rubber or latex, the bonding layers are made of two-component epoxy resin adhesive, and the polygon structure layers are made of aluminum alloy or other light-weight alloy materials and metal materials. By means of the polygon structure layers of the negative mass effect, the integral structure is high in specific strength, specific rigidity and shear modulus, impact-resistant and heat-insulative, the good low-frequency sound absorption performance is achieved, what is more important, the surface density of the integral structure is low, the structure is simple, the board has the advantages of being easy to process and manufacture and convenient to achieve, the whole performance of equipment is not affected, and meanwhile requirements of vibration damping and noise reduction can be met.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and noise reduction, in particular to a composite sound-absorbing panel with a polygonal structure based on negative mass. Background technique [0002] Mechanical vibration is harmful to most engineering structures, mechanical equipment and instruments. Vibration not only easily causes fatigue damage or even destruction of the structure, affects the working performance and life of the equipment, but also reduces the measurement accuracy of instruments and meters. Listed as a major pollution of modern industry. With the development of modern industry, the application of mechanical products and equipment is more extensive, and its power and operating speed are also increasing, resulting in increasingly serious problems of vibration and noise. [0003] In order to strictly control vibration and noise, various countries have formulated their own norms and regulations for different types...

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Problems solved by technology

[0004] For the target requirements of low-frequency vibration and noise reduction in industrial equipment, many vibration-damping structures and materials can be used, but these structures generally have the characteristics of large structure size, heavy weight, and complicated process, which is very inconvenient in practical applications, and The sound absorption frequency band is very narrow in the low frequency range, and has strong selectivity to frequency

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