运输包装件跌落冲击的计算机仿真

包装工程论文编号:BZ044  论文字数:8680.页数:28

 
目录
中文摘要............................................................I
英文摘要.......................................................... II
目录............................................................. III
1.绪论..............................................................1
  1.1 传统跌落实验..................................................1
  1.2 LS-DYNA程序...................................................1
  1.3 LS-DYNA在跌落试验的应用.......................................3
2.仿真部分..........................................................5
  2.1 建立有限元模型................................................5
  2.2 仿真条件设置..................................................9
3.仿真结果分析.....................................................10
  3.1 面跌落分析...................................................10
  3.2 角跌落分析...................................................12
  3.3 楞跌落分析...................................................14
  3.4 跌落结果的分析比较...........................................15
4.结语.............................................................22
  4.1 总结.........................................................22
  4.2 存在的不足...................................................22
  4.3 展望.........................................................22
致谢...............................................................23
参考文献...........................................................24

摘要：本文主要是对液晶显示器的缓冲包装进行研究。80%的电子产品损坏大都来源于跌落碰撞,研发人员往往耗费大量的时间和成本,针对产品做相关质量实验,最常见的结构实验就是跌落与冲击试验。这种方法可靠，但是也存在很多弊端：成本过高；很难观察过程中的现象；重复性差；无法得到原因；不易观察内部特征......而利用LS—DYNA在产品开模前，可解决上述问题，对对象进行相关的模拟仿真可以大大减少研发周期以及相关成本。利用有限元分析软件ANSYS的跌落模块（DTM），建立液晶显示器的缓冲包装系统的有限元模型，对模型进行角跌落，楞跌落,面跌落,从而通过等色图或精确量化的形式得到动态显示冲击过程，分析不同时刻不同高度应力和应变分布，比如进行角跌落时,应力最大集中在与地面接触的那个角上,而显示器的最大应力则在与衬垫相接触的那个楞上,由此提出建议，优化其缓冲包装结构。
关键词：跌落；有限元；ANSYS；仿真
 
Abstract：This article is a liquid crystal display cushion packaging research. 80% of electronic products fell from collision damage most of the R & D personnel often spend a lot of time and cost for products related to the quality of the experiment, the most common structure is falling and the impact of the experimental test. This method is reliable, but there are many disadvantages: high cost; it is difficult to observe the phenomenon of the process; poor reproducibility; can not be reasons for that; ...... not easy to observe the internal features of LS-DYNA using the product to open touch ago, to address these issues, related to the object of simulation can be greatly reduced, as well as costs associated with R & D cycle. The use of ANSYS finite element analysis software module of the fall (DTM), the establish of LCD cushion packaging system, the finite element model of the model, the sutra, falling Angle, which fell by surface such as color chart or accurate quantitative dynamic display of the form, have no time impact analysis of different high stress and strain distribution, such as the biggest drop, stress concentration in contact with the ground, and the Angle of the maximum stress on display in the contact with the liner, and proposes suggestions on sutra, optimize the structure of cushion packaging.
Key words：drop; finite element;ANSYS; simulation