HALT(Highly Accelerated Life Test,高加速寿命试验)是一项新的可靠性试验技术,具体实施还缺乏系统的理论指导。针对HALT试验中的振动激励应力,采用Matlab/Simulink仿真分析了试件在频谱可控的超高斯振动激励作用下的响应特点,研究了H...HALT(Highly Accelerated Life Test,高加速寿命试验)是一项新的可靠性试验技术,具体实施还缺乏系统的理论指导。针对HALT试验中的振动激励应力,采用Matlab/Simulink仿真分析了试件在频谱可控的超高斯振动激励作用下的响应特点,研究了HALT试验振动激励剖面参数(带宽、均方根值、峭度)以及试件本身动力学特性(固有频率、阻尼)对试件响应特性(带宽、均方根值、峭度)的影响,进而给出了理论解释。最后归纳了HALT试验高效率振动剖面的建立方法,并以典型印制电路板为例进行了试验验证。结果表明本文提出的方法是有效的。展开更多
Focusing on electronic products,this paper establishes a finite element model for printed circuit board(PCB)assembling with enhanced ball grid array(EBGA)component under vibration environment.Based on this model,it st...Focusing on electronic products,this paper establishes a finite element model for printed circuit board(PCB)assembling with enhanced ball grid array(EBGA)component under vibration environment.Based on this model,it studies relations between fatigue rate of solder joint and temperature,vibration frequency.Moreover,it analyzes propagation of micro-crack produced by thermal cycle under vibration stress.The results offer a method to optimize the thermal cycle and vibration integrated profile and to combine vibration test and thermal cycling for highly accelerated life test(HALT).展开更多
文摘HALT(Highly Accelerated Life Test,高加速寿命试验)是一项新的可靠性试验技术,具体实施还缺乏系统的理论指导。针对HALT试验中的振动激励应力,采用Matlab/Simulink仿真分析了试件在频谱可控的超高斯振动激励作用下的响应特点,研究了HALT试验振动激励剖面参数(带宽、均方根值、峭度)以及试件本身动力学特性(固有频率、阻尼)对试件响应特性(带宽、均方根值、峭度)的影响,进而给出了理论解释。最后归纳了HALT试验高效率振动剖面的建立方法,并以典型印制电路板为例进行了试验验证。结果表明本文提出的方法是有效的。
基金Sponsored by the National Advanced Research Project of China(41319030101)
文摘Focusing on electronic products,this paper establishes a finite element model for printed circuit board(PCB)assembling with enhanced ball grid array(EBGA)component under vibration environment.Based on this model,it studies relations between fatigue rate of solder joint and temperature,vibration frequency.Moreover,it analyzes propagation of micro-crack produced by thermal cycle under vibration stress.The results offer a method to optimize the thermal cycle and vibration integrated profile and to combine vibration test and thermal cycling for highly accelerated life test(HALT).
