基于Hypermesh联合LS-DYNA对冰柜跌落的仿真研究

目的 优化冰柜的包装结构设计，保证冰柜在运输和搬运过程中不被损坏。方法 首先对冰柜跌落冲击进行理论分析，然后利用SolidWorks进行三维建模；使用Hypermesh对建立的模型进行前处理，基于有限元法用LS-DYNA进行跌落仿真实验，利用LS-PrePost对仿真结果进行后处理。结果 仿真结果表明，冰柜部分结构会发生塑性变形，为此对冰柜底部支撑结构进行了改进，改进后易损部位的变形量减小了1.87 mm。结论 采用Hypermesh联合LS-DYNA的仿真形式对冰柜跌落进行模拟，可以使设计者检测到产品内部受冲击后的变化特性，也可以预知设计缺陷，针对缺陷进行纠正。这样不仅能够保证设计产品的质量，而且能够大大减少生产周期、节约成本，具有很大的市场推广价值。

Simulation of Freezer Drop Based on Hypermesh and LS-DYNA

The work aims to optimize the design of freezer packaging structure to ensure that the freezer is not damaged during transportation and handling. Firstly, theoretical analysis of freezer drop impact was carried out, and then three-dimensional modeling was carried out by Solidworks. The model was pre-processed by Hypermesh, simulated by LS-DYNA based on finite element method, and post-processed by LS-PrePost. The simulation results showed that, plastic deformation would occur in some structures of the freezer. Aiming at this problem, the support structure at the bottom of the freezer was improved. After the improvement, the deformation of the vulnerable parts was reduced by 1.87 mm. Hypermesh and LS-DYNA used to simulate the freezer drop can enable the designer to detect the change characteristics of the product inside after impacted, predict the design defects, and correct the defects. This can not only ensure the quality of the design products, but also greatly reduce the production cycle and save costs, and has a wide range of market promotion values.