缓冲包装跌落仿真误差分析

目的研究Ansys/LS-DYNA DTM模块跌落仿真分析与经典缓冲包装设计方法之间的误差,并分析阻尼及摩擦因数对仿真结果的影响。方法基于经典缓冲包装设计方法,分别设计线弹性与双线性材料为缓冲材料的产品-衬垫系统;利用Ansys/LS-DYNA DTM模块对线弹性与双线性缓冲材料的产品-衬垫系统进行跌落分析,对比分析理论设计与仿真分析结果。结果对于线弹性材料与双线性缓冲材料的产品-衬垫系统,Ansys/LS-DYNA DTM模块跌落仿真分析与经典缓冲包装理论设计之间的误差均在5%以内。系统阻尼的增加导致所受最大冲击加速度减小;摩擦因数对所受最大冲击加速度影响较小;线性粘滞系数的增加导致所受最大冲击加速度增加。结论对于一般的工程应用,Ansys/LS-DYNA DTM模块跌落仿真分析方法与经典缓冲包装设计方法之间的误差在允许范围内。

Drop Simulation Errors of Cushioning Packaging

This paper aimed to study the error between the Ansys/LS-DYNA DTM module drop simulation analysis and the classical method of cushioning packaging design, as well as the influence of damping and friction coefficient on the simulation result. Based on the classical method of cushioning packaging design, product-liner systems using cushioning material with linear elasticity or bilinearity were designed respectively. By analyzing the drop of the liner systems with Ansys/LS-DYNA DTM module, the theoretical design and the result of simulation analysis were comparatively analyzed. For both liner systems using cushioning material with linear elasticity and bilinearity, the error between the Ansys/LS-DYNA DTM module drop simulation analysis and the classical method of cushioning packaging design was no more than 5%. The increasing damping led to the decrease of the maximum impact acceleration; the friction coefficient had little effect on the maximum impact acceleration; increasing linear viscous coefficient caused the increase of maximum impact acceleration. In conclusion, the error between the drop simulation analysis with Ansys/LS-DYNA DTM module and the classical method of cushioning packaging design was acceptable for general engineering applications.