摘要
有限元分析是求解动力响应的重要数值模拟方法,该文首先阐述了有限元动力学方程的建立原理,对主要求解方法进行了比较说明。并以一块电路板为案例,建立有限元模型,利用有限元软件计算焊点在冲击载荷作用下的动力响应,给出焊点应力分布图,为焊点寿命估计和可靠性评价提供参考。
Finite element analysis is an important numerical method for solving dynamic response.In this paper,the principle of establishing the finite element dynamic equation is expounded at first,and then we compare the main numerical methods.We take a printed circuit board as an example,using the finite element software to establish a finite element model and calculate the dynamic response of solder joint under impact loading,The solder joint stress distribution is given,providing a reference for the life prediction and reliability assessment of solder joints under dynamic excitation.
出处
《电子质量》
2013年第10期28-32,共5页
Electronics Quality
关键词
有限元
动力分析
焊点寿命
可靠性评价
finite element
dynamic analysis
solder joint life
reliability assessment
