CAJ | 학술논문

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。
위연구역손건재발포취을희（EPE）완충작용하충격향응，건립료이자유도비선성산품포장계통모형，분석료역손건여 EPE 점탄성우합후적질락가속도특성，토론파손변계상방구역내츤점면적、후도급기비치대역손건가속도향응적영향。결과표명，만족약속조건적역손건적최대가속도향응여완충츤점면적화후도관계성조상특성。수착 EPE완충츤점면적여후도증대，역손건가속도선감소후증대。역손건최대향응가속도여완충츤점체적관계정현“”형상，최후인입계수표정완충츤점적경제성화역손건안전성。
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.