摘要
PCB组件是暴露在恶劣环境中的电子设备中最易损坏的部件,它的动态特性是电子设备机箱设计时需着重考虑的问题之一。为了掌握PCB组件的动态特性,以电子设备中的PCB组件为研究对象,综合运用有限元分析方法(FEA)和实验模态分析方法(EMA)对其动态特性进行了分析。实验模态分析的结果与有限元模态分析结果具有很好的一致性,有限元模型得到了验证。在此基础上,分别对电连接器和芯片对PCB组件的动态特性的影响进行了研究,并得到了两个结论:(1)电连接器存在与否不仅影响PCB组件的固有频率值的大小还将引起其振型的剧烈变化;(2)元器件的存在与否对PCB组件的振型不产生影响,仅对其固有频率值的大小产生影响。
As the most failure parts of electronic equipment in harsh environment,PCB components＇ dynamic characters were treated as one of the most important factors in the process of the chassis designation.In order to master the dynamic character of PCB components,study the PCB component used in electronic equipment,which was investigated by the way of Finite Element Analysis（FEA） and Experiment Modal Analysis（EMA）.Also the FEA and EMA results were correlated well with each other,and the FE model was validated.After that,how the PCB＇s dynamic characters were influenced by the electrical connector and the chips was investigated respectively.At last,two conclusions have been summarized which can be used in the practical work.The two conclusions can be presented as both the PCB＇s modal shapes and frequency values were influenced by the connector but only the PCB＇s frequency values were influenced by the chips on it.
出处
《电子机械工程》
2010年第5期13-17,共5页
Electro-Mechanical Engineering
作者简介
任建峰（1980-），男，工程师，主要从事电子设备结构抗恶劣环境设计与分析、PCB组件的动态响应分析与失效预计工作。
