梁模型三明治板的隔声预报  

Prediction of Sound Transmission Loss for Sandwich Panel by Using Beam Model

作　　者：钱中昌[1,2] 刘碧龙[2] 刘克[2] 

机构地区：[1]上海市计量测试技术研究院,上海201203 [2]中国科学院声学研究所,北京100190

出　　处：《噪声与振动控制》2014年第1期12-15,共4页Noise and Vibration Control

基　　金：国家重点基础研究发展计划(973计划基金编号:2012CB720204)

摘　　要：提出一种针对有限大三明治蜂窝板的隔声预报方法。在一定条件下,三明治蜂窝板被看成是正交各向异性的,通过对蜂窝板正交方向上切割下来梁的简单测试,可以得到三明治蜂窝板的等效刚度,结合正交各向异性板的振动方程,把板的振动展开成模态叠加的形式并求解,最终可以得到一块有限大三明治蜂窝板的理论隔声公式,理论预报结果与实验室测量结果对比良好。An approach for prediction of sound transmission loss for a finite sandwich panel with honeycomb core isdescribed. The sandwich panel is treated as an orthotropic structure, which bending stiffness in two principal directions isestimated by means of simple tests on beam elements isolated from the sandwich panel. Utilizing orthotropic panel theory,along with the obtained bending stiffness in two directions, the sound transmission loss of simply-supported sandwich panelis predicted by modal expansion method. The predicted transmission loss is compared with the measurement data and theiragreement is good.

关 键 词：声学 三明治板 声传递损失 阻尼 有限大尺寸 

分 类 号：TB5[理学—物理]