串联缓冲系统冲击响应与结构优化分析

Impact response of series cushioning system and structure optimization analysis

为了研究瓦楞纸板与泡沫塑料所组成的串联缓冲系统的冲击响应,引入虚拟质量,利用Runge-Kutta法对系统动力学方程进行求解.由试验得到BC双瓦楞纸板和发泡聚乙烯准静态与动态应力-应变关系,建立它们的单轴本构关系.研究串联缓冲系统的冲击响应,试验结果与模型预测值吻合较好.对串联缓冲系统进行体积优化分析,并与发泡聚乙烯系统的优化结果进行比较.结果表明:若不考虑瓦楞纸板的缓冲作用,仅对发泡聚乙烯分析,则会造成资源的浪费.

The virtual mass method was introduced to study the impact response in order to investigate the impact responses for the series cushioning system, made of corrugated paperboard and expanded polyethylene cushion material. The static constitutive relations of BC-flute corrugated paperboard and expanded polyethylene were proposed based on universal testing machine, and their dynamic relationships were built by using the drop tester. The peak acceleration of the series cushioning system composed of the packaging item, expanded polyethylene and corrugated paperboard was obtained. The experimental data accorded well with the prediction results. The volume optimization design and compared to that of foam cushioning system to achieve the cushioning Results show that the overuse of expanded polyethylene is occurred if not was calculated for series system, effect of corrugated paperboard. considering the cushion action ofcorrugated paperboard.