考虑易损件物品-EPE缓冲系统冲击响应分析  

Impact-response analysis of the system composed of critical component and EPE cushion

作　　者：张炜[1] 薛飞[2] 卢富德[1] 高德[1] 

机构地区：[1]浙江大学宁波理工学院,浙江宁波315100 [2]太原科技大学,太原030024

出　　处：《振动与冲击》2015年第9期116-119,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(11402232);宁波市自然科学基金(2011A610154);国家十二五重大科技支撑项目(2011BAD24B01)

摘　　要：为研究易损件在发泡聚乙烯(EPE)缓冲作用下冲击响应,建立了二自由度非线性产品包装系统模型,分析了易损件与EPE黏弹性耦合后的跌落加速度特性,讨论破损边界上方区域内衬垫面积、厚度及其比值对易损件加速度响应的影响。结果表明,满足约束条件的易损件的最大加速度响应与缓冲衬垫面积和厚度关系成条状特性。随着EPE缓冲衬垫面积与厚度增大,易损件加速度先减小后增大。易损件最大响应加速度与缓冲衬垫体积关系呈现""形状,最后引入系数表征缓冲衬垫的经济性和易损件安全性。In order to investigate the impact response of cushioning systems made of expanded polyethylene（ EPE）and items with critical component,a nonlinear packaging model with two degrees of freedom containing a critical component was established,and solved by using numerical method with a given constitutive relationship of EPE. The impact response in terms of acceleration histories of the cushioning system was obtained,and the effects of cushion area,height and their ratio on the acceleration distribution on damaged boundary were discussed. The numerical results show that the acceleration response of the critical component is influenced appreciably by the above parameters. It is shown that the relationship between the maximum acceleration response of the critical component and the area and thickness of the cushion appears a strip shape character when the cmponent meets the fragility requirements and dimension requirements.As the area and thickness of EPE cushion increase,the acceleration decreases first and then increases. The relationship between the acceleration and the volume of EPE cushion is like the symbol ＂√＂. At last,a parameter was introduced to describe the cushion economy and the critical component safety.

关 键 词：易损件 跌落 EPE 缓冲 冲击 

分 类 号：TB485.3[一般工业技术—包装工程] O322[理学—一般力学与力学基础]