双层非织造多孔材料吸声模型仿真

Simulation of Sound Absorption Model for Dual-Layer Porous Nonwovens

关于优化吸声降噪工程材料问题,传统硬质穿孔板吸声效果差。为了提高吸声性能,根据材料的重要结构参数变化和单层多孔材料吸声机理,研究了A、B两种材料的厚度、孔隙率和孔隙半径变化对吸声系数的影响。以建立的数学模型为基础,通过仿真研究了最大吸声系数与A、B两种材料结构参数的关系,为最优化双层非织造多孔吸声材料结构提供了实验基础。经仿真表明,双层非织造多孔纤维吸声材料模型具有良好的吸声效果,从而为产品研发提供了理论依据。

A theatrical model of sound absorption is established for dual-layer porous nonwovens of different types and structures.Based on the variety of the important structural parameters of the nonwoven materials,the effect of the thickness,porosity and pore radius on the sound absorption coefficients is explored deeply.With the mathematic model,the relationship between maximum of sound absorption coefficient and the structural parameters is researched by simulation,which provides the experimental base for the structure optimization of dual-layer porous sound absorption materials.The experiment analysis indicates that the dual-layer porous nonwoven materials have excellent sound absorption performance,which provides theory support for the product design.