某型号液晶电视包装件角跌落仿真及屏碎分析

目的 为了提高液晶电视的包装在跌落过程中的保护作用，增加产品安全性。方法 采用三维建模软件Creo建立液晶电视零部件及包装三维实体模型，导入LS-DYNA进行有限元仿真分析，并通过液晶电视跌落试验验证了跌落仿真分析的可行性。基于仿真结果在LS-DYNA中重新建模，有针对性地设计新的包装结构。将改进后的包装件进行相同的跌落模拟，对比改进前后结果。结果 对液晶电视包装件进行角跌落自由落体的工况下的跌落仿真分析，结果显示，改进包装前液晶面板z方向的加速度峰值最大，最大可达到250g，改进包装后各方向峰值都相应减少，其中面板z方向加速度峰值降低了64%，同时液晶面板Mises应力最大值减少了10%。结论 有限元仿真分析能较为准确地反应实际跌落工况，并能获得液晶电视跌落冲击中任一时刻各部件的Mises应力和变形，对包装的设计改进具有指导意义，改进的包装结构能对液晶电视起到更好的保护作用。

Corner Drop Simulation and Screen Fragmentation Analysis of a LCD TV Package

The work aims to improve the protective effect of LCD TV package in the process of falling and increase product safety. Creo, a three-dimensional modeling software, was used to build a three-dimensional solid model of LCD TV parts and package. LS-DYNA was introduced to carry out the finite element simulation analysis, and the feasibility of the drop simulation analysis was verified by the drop test of LCD TV. Based on the simulation results, a new package structure was designed and simulated in LS-DYNA. The same drop simulation was carried out on the improved package. The results before and after the improvement were compared. The corner drop simulation analysis of LCD TV package was carried out under the condition of free falling. Its results showed that, the peak acceleration in the z direction of LCD screen with previous package was the maximum, i.e. 250g. The peak acceleration in all directions was decreased accordingly for the improved package. The peak acceleration in the z direction of the screen and the maximum Mises stress of LCD screen were decreased by 64% and 10%, respectively. The finite element simulation analysis can accurately reflect the actual dropping condition, and obtain the Mises stress and deformation of each component at any time during the drop impact of the LCD TV. It has guiding significance for the improvement of package design, and the improved package structure can protect the LCD TV better.