基于动态特性的印制板结构改进

A STUDY ON THE DYNAMIC BEHAVIOR OF A PRINTED CIRCUIT BOARD IN ELECTRONIC BOX FOR SHIP APPLICATION

印制板的动态特性对电子设备的可靠性有较大的影响。本文结合计算方法和实验方法对印制板的动态特性进行研究 ,对二种方法所得结果进行比较 ,证实了本文所采用的印制板有限元模型成型技术的有效性。一般地 ,船舶运行时外界环境所引起的激励频率范围为几Hz至几百Hz ,为了避免印制板共振引起的产品失效 ,希望印刷板的基频越高越好。通过计算 。

The dynamic behavior of printed circuit (PC) boards exercises strong influence on the reliability of electronic equipment.In the paper,the dynamic behavior of a PC board is studied by means of computation and verified by experiment with favorably compared results.This shows that FE modeling strategy used is sound.In general,exciting frequencies induced by external environment are in the range from several Hz to several hundred Hz.In order to avoid product failures due to resonance,it is desirable to make the fundamental natural frequency of PC boards as high as possible.Two structural modified design methods to raise the fundamental frequency are given with a numerical example.