酚醛覆铜板模态分析

Modal Analysis of Phenolic CCL

针对PCB电路板中广泛应用的酚醛覆铜板进行振动模态分析,首先对酚醛电木梁进行振动实验,再计算得到了酚醛材料的弹性模量,然后利用Ansys软件分析了单面酚醛覆铜板在一端固支一端自由边界条件下的模态特性。通过振动实验与锤击实验得到复合板的固有频率,理论与实验结果基本一致,证实了酚醛电木板的弹性模量试验计算值是正确的。本方法可以为相同材料的复杂结构的分析提供参数依据。

The vibration modals of phenolic CCL panel, which is widely used in PCB circuit, are analyzed. First of all,the vibration of a beam composed by the phenol and wood is experimented so that the Young’s modulus of the phenolic material is calculated. Then, the modal characteristics of the phenolic CCL panel with the boundary condition of one end clamped and the other end free are analyzed with ANSYS software. Through the vibration experiment and hammering test,the natural frequencies of the composited phenolic CCL panel are obtained. The consistency of the theoretical results and experiment results proves the correctness of the Young’s modulus of the phenolic material. The results given in this paper have provided some parameters for analysis of the complex structures with the same materials.