单层薄板在共振频率区隔声性能的有限元分析  

FEM Analysis of Single-Layer Circular Plate′s Sound Transmission Loss in Resonance Region

作　　者：王英敏[1] 胡碰[1] 朱蓓丽[1] 

机构地区：[1]上海交通大学振动冲击噪声国家重点实验室,上海200030

出　　处：《噪声与振动控制》2006年第4期55-57,66,共4页Noise and Vibration Control

摘　　要：用有限元分析方法计算了圆形薄板在夹持和自由放置等情况下的振动模态,揭示了单层板在共振区隔声量下降的机制,并计算出试样在共振区的隔声量,与实验结果符合良好。最后提出了声管隔声量测试中低频段应注意的若干问题。The vibration modes of circular plates under clamped edges and free edges had been studied with FEM. FEM calculated the sound transmission loss and revealed the reasons that the sound transmission loss had dropped in resonance region. It agrees well with the experiment. In the end, some aspects that should be considered when measuring the sound transmission loss were presented.

关 键 词：声学 有限元方法 隔声量 振动模态 

分 类 号：O241.82[理学—计算数学]