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.
出处
《噪声与振动控制》
CSCD
2014年第2期192-195,共4页
Noise and Vibration Control
关键词
振动与波
夹层板
隔声量
混合声场
橡胶
损耗因子
vibration and wave
sandwich panels
sound transmission loss
mixed sound field
rubber
damping loss factor
