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Preparation method for thermal-acoustic two-field metamaterials under thermal noise environment

A metamaterial and thermal noise technology, applied in the direction of sound-generating devices, instruments, etc., can solve the problems that cannot be described uniformly, and achieve the effect of convenient and economical preparation

Active Publication Date: 2018-01-19
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] Due to the different types of equations describing the thermal field and the sound field, the variables and responses have different physical concepts, dimensions and magnitudes, etc., and cannot be described uniformly

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  • Preparation method for thermal-acoustic two-field metamaterials under thermal noise environment
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  • Preparation method for thermal-acoustic two-field metamaterials under thermal noise environment

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Embodiment Construction

[0034] The present invention proposes a method for preparing a thermo-acoustic two-field metamaterial applied in heat and noise environments, aiming to meet the two functional requirements of heat protection and noise reduction of the structure in a multi-field service environment through the design of a structure . A method for preparing a thermal-acoustic two-field metamaterial for thermal noise environments, including an epoxy resin matrix, a rubber elastic coating, and a local resonant acoustic metamaterial unit cell composed of hard mass core lead, arranged periodically The formed finite-size local resonance acoustic metamaterial sheet replaces the epoxy resin matrix of each unit cell with a laminated thermal metamaterial formed by alternating lamination of latex and silicone rubber; or wraps the rubber elastic coating layer The elastic resonance unit composed of the hard mass core of lead is embedded in a particle-filled thermal metamaterial formed by filling non-spheric...

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Abstract

The invention discloses a preparation method for thermal-acoustic two-field metamaterials under the thermal noise environment. Local resonance acoustic-metamaterial unit cells composed of epoxy resinmatrixes, rubber elastic coating layers and hard-quality core lead, and limited-size local resonance acoustic-metamaterial thin plates formed by periodic arrangement are included. The epoxy resin matrixes of all the unit cells are replaced with a laminated-type thermal-metamaterial formed by alternate laminating of latex and silicone rubber; or elastic resonance units composed of the hard-qualitycore lead coated with the rubber elastic coating layers are embedded in a particle-filled thermal-metamaterial formed in the mode that a base material is filled with non-spherical nanometer particles.The two functional requirements of heat shielding and noise reduction of the structure under the multi-field service environments are met.

Description

technical field [0001] The invention belongs to the technical field of structural heat protection, vibration reduction and noise reduction design. It is mainly the preparation method of thermal-acoustic two-field metamaterials based on the existing anisotropic thermal metamaterials and local resonance acoustic metamaterials, which are specifically applied to heat protection and vibration reduction in the multi-field service environment of cutting-edge equipment structures need. Background technique [0002] Metamaterials (or metamaterials) that have emerged in recent years are artificially designed materials that have properties that natural materials do not have, such as negative Poisson's ratio, negative refractive index, negative modulus, and negative density. Taking acoustic metamaterials as an example, its unique bandgap characteristics provide new solutions to engineering problems such as noise reduction and sound insulation design inside equipment structures, and pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162G10K11/172
Inventor 李跃明李珍朱昀
Owner XI AN JIAOTONG UNIV
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