基于声阻抗匹配理论的弹性吸收体研究

Study on elastic absorbers based on the theory of acoustic impedance matching

基于时域耦合模型理论的吸收体研究,不适用于所有模型,且基于此理论的设计过程复杂,难以在工业工程得到广泛应用。因此提出一种基于声阻抗匹配理论的弹性吸收体的研究方法,并通过理论计算、数值仿真以及实验对吸收体的吸收曲线进行验证。结果表明:本文提出的方法能够快速、简便地实现弹性吸收体的结构设计,无需额外附加阻尼材料,更有利于满足航空工程中对于结构轻量化的要求,为振动波吸收领域,尤其是弯曲波的高效吸收和减振设计研究带来了新的可能性。

The study on the absorber of flexural waves based on time-domine model coupling theory is not applica-ble to all models,and has complex design process,which is difficult for widespread application in industrial engi-neering.Therefore,a research method for elastic absorbers based on the acoustic impedance matching theory is pro-posed.The absorption curve of absorbers is verified with theoretical calculations,numerical simulations and experi-ment.The results show that the proposed method can quickly and easily realize the structural design of elastic ab-sorbers,bringing new possibilities for the research on flexural waves absorption and vibration reduction design.The theoretical method and absorption structure proposed in this paper do not need additional damping materials,which is more conducive to meet the requirements of lightweight structures in aeronautical engineering.At the same time,it brings new possibilities for the field of vibration wave absorption,especially the design of efficient absorption and vibration reduction of curved waves.