头戴式耳机跌落冲击的仿真分析与实验

Simulation Analysis and Experimental Study for Headset Drop Impact

中文关键词: 有限元分析  跌落冲击  头戴式耳机  高速摄影

英文关键词: finite element analysis  drop impact  headset  high speed photography

中文摘要:

      目的 对跌落测试中的破坏风险进行预测和改进，从而提升设计效率。方法 基于Abaqus，对头戴式耳机进行整机跌落仿真分析，对其在规定高度下撞击地面的整机结构耐冲击性进行研究，考虑到材料的非线性和应变率效应，采用质量缩放、应力包络图等技术来提升仿真效率，并将高速摄影下的实际跌落过程与仿真结果进行对比。结果 数值仿真预测了产品在跌落过程中的破坏风险，并对优化后的设计进行了验证，与实验结果高度吻合。结论 在头戴式耳机一类消费电子产品的设计中，合理利用数值仿真，可有效缩短产品研发周期，降低研发成本，提升产品质量，从而提高产品的市场竞争力。

英文摘要:

      It brings a lot of benefit by predicting the failure before making a prototype. The drop simulation analysis of the headset is carried out with Abaqus, and the impact resistance of the whole structure hitting the ground at a specified height is studied. The material nonlinearity and strain rate effect has been considered, the techniques such as mass scaling and making stress envelope are adopted to improve the efficiency of the simulation. The original design is optimized based on the simulation results, then the simulation result of the final design is compared with the actual drop test result caught by a high-speed photography, the simulation results are highly consistent with the experimental results. This shows that the finite element analysis can effectively shorten the time and reduce the cost of product development, and improve product quality, which is very important for consumer electronic products such as headsets.