园林修枝机跌落仿真研究及结构优化设计  

Drop simulation and structural optimization design of garden pruning machine

作　　者：孙亮[1,2] 陈希良[1] 程蓓 齐明思[2] 肖江剑[1] SUN Liang;CHEN Xi-liang;CHENG Bei;QI Ming-si;XIAO Jiang-jian(Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201;School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China;Ningbo Cheery Garden Tools Co. , Ltd. , Ningbo 315505, China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201 [2]中北大学机械与动力工程学院,山西太原030051 [3]宁波创跃园林工具有限公司,浙江宁波315505

出　　处：《机电工程》2017年第12期1402-1406,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家高技术研究发展计划("863"计划)资助项目(2015AA016403);宁波市产业技术创新重大专项资助项目(2015B11031)

摘　　要：针对园林修枝机在使用和运输中可能发生跌落破损的问题,对修枝机关键部位的跌落过程进行了研究。运用Hypermesh和LS-DYNA联合仿真技术对修枝机水平跌落、竖直侧向跌落两种极限工况进行了仿真分析,得到了修枝机发生跌落后关键部位的最大冲击应力和破损发生位置。然后对修枝机进行了实际跌落试验,观察到破损发生的位置。结合仿真试验和实际试验结果,得知修枝机发生跌落后,其旋转管部件发生了较为严重的破损现象,影响了修枝机的使用寿命。对旋转管结构进行了优化设计,并通过跌落仿真进行了验证。研究及设计结果表明:改进后的结构在两种极限工况下跌落时关键部位不发生破损,满足设计需求。Aiming at the problem that the garden pruning machine might be damaged result from the drop in the course of use and transportation,the dropping process of the key parts of the pruning machine was studied.Simulation analysis was carried out for two kinds of drop conditions namely horizontal falling and vertical lateral falling of the pruning machine based on Hypermesh and LS-DYNA.The maximum impact stress and damage location of the key parts after the fall of the pruner were gotten.The actual drop test was carried on the pruning machine and observed the location of the damage.Based on the results of simulation and experiment,we knew that rotating tube was the easily damaged part of the pruning machine.Pruning machine service life was affected by the drop impact.The structure of the rotating tube was optimized and verified by the drop simulation.The results indicate that the key parts of the improved structure don＇t damage dropped under the two limiting conditions and meet the design requirements.

关 键 词：修枝机 跌落仿真 旋转管 结构优化 

分 类 号：TH122[机械工程—机械设计及理论] S776.274[农业科学—森林工程]