摘要
推导了运输包装三轴随机振动激励下产品上关注点的vonMises等效应力与激励加速度均方根值的关系,证明了关注点处材料应力疲劳曲线(σ⁃N曲线)和运输包装振动疲劳曲线(G_(rms)⁃T曲线)的等价性;针对两类工程上常用的Basquin型(幂函数型)和指数函数型损伤和疲劳模型,给出了其G_(rms)⁃T曲线形式,得到了基于G_(rms)⁃T曲线的运输包装加速随机振动时间压缩比,并通过产品模型有限元算例验证了其正确性。由于加速度易于分析和测量,因此基于G_(rms)⁃T曲线的运输包装加速随机振动试验技术具有潜在的应用价值和进一步研究发展空间。
In this paper,the relation between the von Mises equivalent stress at the concerned point and the root mean square of the excitation acceleration on the transport package under triaxial random vibration excitation is derived.The equivalence between the stress fatigue curve(σ-N curve)at the concerned point and the vibration fatigue curve(G_(rms)-T curve)of the transport package is certificated.For the two types of damage and fatigue models commonly used in engineering,that is,the Basquin type(power func-tion type)and the exponential function,the corresponding G_(rms)-T equations are obtained.The time compression ratio of accelerated random vibration test for transport package is given based on the G_(rms)-T curve,and its validity is verified by the finite element analy-sis of product model.As the acceleration is easy to analysis and measurement,the accelerated random vibration test technology for transport package based on the G_(rms)-T curve has application and development potential for further researches.
作者
王志伟
刘博
王立军
WANG Zhi-wei;LIU Bo;WANG Li-jun(Packaging Engineering Institute,Jinan University,Zhuhai 519070,China;MOE Key Laboratory of Disaster Forecast and Control in Engineering,Jinan University,Guangzhou 510632,China;Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes,Jinan University,Zhuhai 519070,China;Zhuhai Key Laboratory of Product Packaging and Logistics,Jinan University,Zhuhai 519070,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2022年第2期297-306,共10页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(50775100)
珠海市重点学科、重点实验室资助项目。
关键词
随机振动
加速振动试验
运输包装
振动疲劳曲线
random vibration
accelerated vibration test
transport package
vibration fatigue curve
