鲨鱼盾鳞仿生起苗铲减阻仿真分析  

Simulation Experiment on Drag Reduction Characteristics of Biomimetic Seedling Lifting Based on Shark Shield Scales

作　　者：霍鹏 李建平[1] 杨欣[1] 许述财[2] HUO Peng;LI Jian-ping;YANG Xin;XU Shu-cai(College of Mechanical and Electrical Engineering,Agricultural University of Hebei,Hebei Baoding 071000,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China)

机构地区：[1]河北农业大学机电工程学院,河北保定071000 [2]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《机械设计与制造》2023年第3期242-248,共7页Machinery Design & Manufacture

基　　金：现代农业产业技术体系专项资金(CARS-27);河北省现代农业产业技术体系创新团队建设(HBCT2018100205)。

摘　　要：针对苹果苗木起苗机作业中铲尖磨损严重、碎土困难、能量损耗大等问题,基于锤头双髻鲨盾鳞的沟槽结构,利用仿生学原理设计了一种鲨鱼盾鳞仿生起苗铲。借助LS-DYNA软件对仿生起苗铲进行应力应变分析,并与传统起苗铲进行对比试验研究。结果表明,鲨鱼盾鳞仿生起苗铲最大等效应力为8.085×10-6MPa,等效应变为2.089×10-11,变形远小于设计要求的5mm,验证了设计的合理性;在土壤中作业时,鲨鱼盾鳞仿生起苗铲较传统起苗铲能量损耗平均减小了14.29%,减阻效果明显,满足减阻设计要求。结构合理、减阻耐磨的鲨鱼盾鳞仿生起苗铲可为进一步提高苹果苗木起苗机作业性能提供技术支撑。In order to solve the problems of breaking up soil,high quality of digging shovel and serious abrasion of shovel tip,a bionic seedling lifting shovel was proposed based on the structural bionics principle.According to the slot structure of the smooth hammerhead shield scale,the bionic model of the seedling lifting shovel was built,and the stress and strain of the bionic seedling lifting shovel were analyzed with the finite element software LS-DYNA,and compared with the traditional seedling lifting shovel.The results show that the maximum equivalent stress is 8.085×10-6MPa,the equivalent strain is 2.089×10-11,and the deformation is much less than 5mm,which proves the rationality of the design The energy loss of Bionic seedling-lifting shovel was reduced by 14.29% than that of traditional seedling-lifting shovel.The design of the bionic seedling-lifting shovel can provide a reference for further improving the resistance reduction performance of the seedling-lifting Shovel.

关 键 词：结构仿生 起苗铲 LS-DYNA 有限元分析 减阻性能 

分 类 号：TH16[机械工程—机械制造及自动化] TH122[农业科学—农业机械化工程] S232[农业科学—农业工程]