摘要
研究非线性包装件中关键部件在真实的具有一定谱特征的随机振动激励下的振动可靠度。考虑到实测随机振动PSD曲线的多峰值特征,采用多阶Kanai-Tajimi模型模拟随机振动的功率谱密度,将真实随机振动在标准正态随机变量空间中离散化表达。考虑包装件中的关键部件,将包装件建模为二自由度非线性支座激励系统,应用模型修正因子法,将非线性包装件等效表示为一个线性化系统,应用一阶可靠度方法分析包装系统中关键部件的首次穿越损坏概率。应用数值分析的方法分析包装件中各参数变化对损坏概率的影响。该研究对于计算包装件损坏概率、优化包装件参数以提高振动可靠度,具有重要的指导意义。
The vibration reliability of critical components of a nonlinear packaging system excited by random vibration with specified spectrum characteristic was studied.The multi-order Kanai-Tajimi PSD model was adopted to present the multi modal property of the real random vibration.The real random vibration was discretized and presented in standard normal random space.The package was modeled as a two-degree-of-freedom base excited nonlinear system.The model correction factor method was used to find the equivalent linear system for the nonlinear packaging system.The first order reliability method was used to obtain the fist passage failure probability.The effects of parameters variations on the critical component failure probability were also explored.The method and results presented are valuable for package vibration reliability analysis and package design optimization.
作者
朱大鹏
ZHU Dapeng(School of Traffic and Transportation,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第18期109-114,134,共7页
Journal of Vibration and Shock
基金
国家自然科学基金(51765028)
兰州市人才创新创业项目(2015-RC062)
