Abstract：Composed of rigid back cavity (RBC) covered with a flexible plate, a plate silencer can suppress the propagation of noise through the duct by coupling incident sound pressure with the flexible plate, which has broadband low-frequency characteristics. To improve the performance of the plate silencer further, a plate silencer with a flexible back cavity (FBC) was proposed. The transmission loss characteristics of the FBC plate silencer were derived, and the influence of structural parameters of the flexible back plate was studied as well as the mechanism of the silencer. Comparison was made between the FBC plate silencer with existing RBC plate silencers. The theoretical results agreed well with finite element method (FEM) results; and the bandwidth of the FBC plate silencer was improved obviously, compared with that of the RBC plate silencer under the same size condition.
侯九霄，朱海潮，袁苏伟，廖金龙. 弹性背腔板式消声器的低频宽频带消声特性[J]. 振动与冲击, 2020, 39(20): 251-257.
HOU Jiuxiao, ZHU Haichao, YUAN Suwei, LIAO Jinlong. Low-frequency broadband characteristics of a plate silencer with a flexible back cavity. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(20): 251-257.
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