Sound insulation simulation calculation method of acoustic metamaterial plate

Abstract

The invention discloses a sound insulation simulation calculation method of an acoustic metamaterial plate. The sound insulation simulation calculation method comprises the following steps: establishing a three-dimensional model of the acoustic metamaterial plate; selecting an acoustic-solid coupling module from commercial software COMSOL; importing the geometric model into a COMSOL and setting aunit; establishing a cavity and forming a combined body with the imported model; setting global parameters; setting a variable and an integral operator; using the solving module for adding materials to the corresponding model domains and setting the corresponding domains; setting a load and a boundary condition; dividing the model into grids; adding research, and setting the frequency range and step length of solving; and calculating and adding a one-dimensional drawing in commercial software, drawing a structure sound insulation index curve, and exporting data. According to the sound insulation simulation calculation method, complex theoretical calculation is avoided, and the design efficiency is optimized, and the sound insulation simulation calculation method is of great significance toresearch of the acoustic metamaterial.

Description

technical field [0001] The invention relates to the field of acoustic metamaterial research, in particular to a sound insulation simulation calculation method for an acoustic metamaterial plate. Background technique [0002] Acoustic metamaterials are currently a hot spot in the field of machinery and noise control. By artificially arranging the local resonance units periodically, it has extraordinary properties, such as negative mass density and negative elastic modulus. These characteristics make it different from the sound insulation of homogeneous panels, which can form the sound insulation peak in the low frequency band. Among them, the acoustic metamaterial plate is to add soft materials and mass blocks on the thin plate, similar to the spring vibrator system, and perform sound insulation through the local resonance of each unit. [0003] At present, the research on acoustic metamaterial panels mainly focuses on two aspects of sound insulation and vibration reduction...

AI Technical Summary

Problems solved by technology

[0004] There are roughly Abaqus, VAone, and LMS Virtual.Lab software for software simulation to solve the sound insulation of structures, among which Abaqus can directly solve the sound insulation of structures but the calculation accuracy is not high. ANSYS, etc. solve the modal results of the structure and then import them into the software to calculate the sound insulation. The process is relatively cumbersome.

Images