橡胶芯夹层板隔声特性研究  

Study on Sound Insulation Performance of Sandwich Panels with Rubber Cores

作　　者：王康乐[1] 温华兵[1] 陆金铭[1] 彭子龙[1] 

机构地区：[1]江苏科技大学振动噪声研究所,江苏镇江212003

出　　处：《噪声与振动控制》2014年第2期192-195,共4页Noise and Vibration Control

摘　　要：基于夹层板的Hoff理论和声学反射、透射和辐射机理,建立了声振理论模型,结合模态函数的正交性及流—固耦合边界条件求解了声振耦合系统方程。再根据声场的特性,建立了混合声场下夹层板的隔声量表达式。最后,用数值方法研究了芯层的损耗因子、厚度、弹性模量,以及平面尺寸对夹层板隔声量的影响,对工程应用有一定的参考价值。Based on Hoff theory and acoustical mechanism of reflection, transmission and radiation, a vibro-acoustic model of sandwich panels is established. The acoustic-vibration coupled equation of this model is solved using the orthogonality property of the modal functions and fluid-structure coupled boundary condition in the interface. Then, the sound transmission loss formula of the sandwich panels located in a mixed sound field is derived. Finally, the influence of different damping factors, thicknesses, elastic modulus of the core layer and the panel’s planar dimensions on the sound transmission loss of the sandwich panels is studied by numerical simulations. This work has some guiding significance for engineering practice.

关 键 词：振动与波 夹层板 隔声量 混合声场 橡胶 损耗因子 

分 类 号：TB535.1[理学—物理]