目的 研究某工控设备缓冲包装的跌落数值仿真技术。方法 建立一种工控设备缓冲包装的跌落仿真模型， 从仿真结果中获得跌落加速度曲线和产品的等效应力云图， 观察缓冲包装的变形动画； 对比缓冲包装的跌落试验， 验证了跌落仿真模型； 基于验证的跌落仿真模型， 研究EPE衬垫尺寸对缓冲包装跌落冲击响应的影响规律。结果 跌落仿真与跌落试验的加速度曲线趋势基本吻合， 峰值加速度相差仅0.8%； 仿真的等效应力云图显示产品满足强度要求， 未发生永久变形， 与跌落试验结果一致。对EPE衬垫尺寸的跌落缓冲研究表明， 相对于缓冲面积， 缓冲厚度的大小对跌落加速度具有更为显著的影响。结论 建立的跌落仿真模型具有较高的模拟精度， 为产品的缓冲包装结构设计及其优化奠定了良好基础。

To investigate the drop numerical simulation technology of an industrial control equipment cushion packaging. The drop simulation model of an industrial control equipment cushion packaging was established. The drop acceleration curve and equivalent stress cloud were obtained from simulation results and deformation animation was observed. Comparative drop tests of cushion packaging was designed to validate the drop simulation model. Based on the verified drop simulation model, the effect of EPE cushion size on the drop impact response of cushion packaging was studied. The drop acceleration curve from drop simulation was basically in agreement with that of the drop test and the difference in peak acceleration was only 0.8% . The equivalent stress cloud showed that the product met the strength requirement and permanent deformation was not produced, which was in accordance with the drop test results. The research on EPE cushion size revealed that the cushion thickness had more significant effect on drop acceleration compared with cushion area. The drop simulation model established in this paper had high accuracy and could be used in structure design and optimization of cushion packaging in the future.