侧吸式油烟机包装件的跌落分析及优化设计

目的基于侧吸式油烟机包装件的跌落试验与仿真研究,对侧吸式油烟机缓冲包装的结构进行改进设计。方法首先对侧吸式油烟机包装件进行原方案的跌落试验,然后运用Pro/E软件建立三维模型,并利用Workbench和LS-DYNA软件进行跌落仿真分析,最后结合跌落试验与仿真结果,改进缓冲包装的结构设计,进行仿真验证。结果通过跌落试验,观察到底面和侧面衬垫以及油烟机机体都发生了损坏,得到了支撑架零件各个跌落工况的冲击加速度值。对比跌落试验和仿真分析结果,两者误差在9%以内。结合试验与仿真分析结果,对原设计方案进行改进并仿真验证,得到原方案从初始速度值2.97 m/s衰减到0所需的时间为10.3 ms,最大加速度值为43.10g,改进方案的初速度衰减到0需要14.5 ms,最大加速度值为33.41g。结论运用试验和仿真的方法对侧吸式油烟机包装件进行评估,验证仿真结果的有效性,利用仿真分析法指导缓冲包装改进设计,此思路能够为后续类似的缓冲包装设计提供参考。

Analysis and Optimization Design of Side Suction Range Hood Package Drop

The work aims to improve the buffer package structure of the side suction range hood based on the drop test and simulation study of the package of the side suction range hood. Firstly, the original scheme of drop test was carried out on the package of the side suction range hood. Then, a 3D model was established with Pro/E software, and the drop simulation analysis was carried out with Workbench and LS-DYNA software. Finally, combined with the drop test and simulation results, the design of buffer package structure was improved, and the simulation verification was carried out. Through the drop test, the damage of the bottom and side cushions as well as the body of the range hood was observed, and the impact acceleration value of the parts of the support frame under each drop condition was obtained. Compared with the drop test and simulation analysis results, the error of the two was within 9%. The improved design and simulation verification of the original scheme were carried out based on the experimental and simulation analysis results, showing that the pulse time of the original scheme decaying to 0 m/s from the initial velocity value of 2.97 m/s was 10.3 ms, and the maximum acceleration value was 43.10g, while the pulse time decaying to 0 m/s of the improved scheme required 14.5 ms, and the maximum acceleration value was 33.41g. The packages of side suction range hood are evaluated by means of experiment and simulation. After verifying the effectiveness of simulation results, the simulation analysis method is used to guide the improved design of buffer packaging. This idea can provide some references for similar follow-up buffer packaging design.