Generalized photonic crystal acoustic shield

Abstract

The invention provides a generalized photonic crystal acoustic shield which comprises a generalized photonic crystal column shell and a generalized photonic crystal semispherical shell connected with the generalized photonic crystal column shell. An annular boss is arranged at the bottom end of the generalized photonic crystal column shell, threaded holes are formed in the annular boss in the circumferential direction, the annular boss is connected with a base, and the generalized photonic crystal column shell and the generalized photonic crystal semispherical shell are at least provided with two cycle components from inside to outside. Each cycle component is composed of a nonmetal layer and a metal layer in sequence from inside to outside, wherein the nonmetal layer and the metal layer are attached to each other. The cycle components are attached mutually. The generalized photonic crystal acoustic shield has the advantages of being high in sound insulation, easy to mount, demount and transport, low in design and manufacturing cost and the like, and the generalized photonic crystal acoustic shield has the good vibration reduction effect on vibration within a band gap range.

Description

technical field [0001] The invention relates to a sound insulation device, in particular to a generalized phonon crystal sound insulation cover. Background technique [0002] At present, industrial machinery and equipment produced in my country rarely consider noise prevention and control in the design and manufacture, so that strong noise is radiated during operation, which in turn causes serious noise pollution in the workplace, which not only affects the health of the staff, but also reduces labor efficiency. Moreover, the surrounding residential areas have been affected, and disputes have occurred continuously, which have affected production and life and even caused various misfortunes. Therefore, it is of great significance to improve people's living environment by reducing or reducing noise pollution. [0003] In the practical application of engineering, there are three main approaches to noise control: (1) control the sound source, that is, start from the sound source...

AI Technical Summary

Problems solved by technology

In actual engineering, it is necessary to regularly overhaul and maintain the sound insulation device and sound source equipment. It is often required that the sound insulation cover should be light and convenient, easy to assemble, disassemble and transport. However, the structure of the existing sound insulation cover is too heavy to meet the above requirements. Require

[0004] The use of existing sound insulation technology can certainly attenuate the vibration transmitted to the structure and the noise radiated to a certain extent, but at present, the noise generated during the operation of many pressurized equipment is extremely large. As far as the existing sound insulation cover is concerned In other words, the sound insulation is small, which is far from meeting the requirements

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