摘要
The theory of active absorption of the perforated plate is proposed in this paper.The perforated plate is used as the material of active absorption and the depth of the cavity behind the perforated plate is changed according to the resonant frequency of the perforated plate.The rigid wall is moved to produce resonance so that the absorption coefficient can reach the maximal level.It is shown from the numerical calculation that when the perforated plate resonates,the moving distance is large at low frequencies,and the absorption coefficient is low under certain conditions.Perforated plate resonance is effective for single frequency of incident sound wave,which is difficult for the wide frequency,so active absorption based on airflow is posed,and the numerical calculation and experiment are carried out.The results denote that this method of active absorption is practical.
作者
ZHANG Renqi
ZHU Congyun
DING Guofang
HUANG Qibai
张仁琪;朱从云;丁国芳;黄其柏(School of Mechatronics Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Mechanical Science&Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
基金
National Natural Science Foundation of China(No.51705545)。
