马铃薯仿生挖掘铲片的设计与仿真

据蝼蛄前足胫节爪趾第1趾的体视显微镜照片设计了马铃薯挖掘机挖掘铲铲片，为马铃薯挖掘机提供了一种减阻效率较高的挖掘铲。应用AutoCAD软件获取爪趾外侧曲线和内侧曲线的轮廓点，并将点坐标值数据使用LIST命令导出，并借助EXCEL软件多项式拟合法对爪趾的侧面轮廓线进行拟合，在拟合多项式的基础上在Solidworks软件中进行仿生铲片的建模，最后应用LS-DYNA软件仿真模拟普通铲片与仿生铲片挖削土壤的过程，并测定两种铲片的土壤阻力。仿真结果表明，仿生铲片较普通铲片土壤阻力减小近61%。所设计的仿生挖掘铲片为马铃薯挖掘机挖掘铲减阻技术要求提供了一种解决思路，且结构新颖。

Design and simulation research on the potato bionic digging shovel

In order to provide a digging shovel with higher efficiency of drag reduction, a shovel was designed out for potato digger according to the stereomicroscope photo about first claw toe of Gryllotalpa hind tibia. The contour point of claw toe outward curve and inward curve were obtained using AutoCAD software, point coordinate values were leading-out by the commands of LIST. The claw toe contour was fitted with the help of Excel software. The model of bionic shovel was established by the Solidworks software. The process of cutting soil with ordinary shovel and bionic shovel were simulated by the Ls-Dyna software and measured the soil resistance for these two shovels. The simulation results showed that soil resistance was reduced approximately 61% by the bionic shovel compared with the normal shovel. The design can be supplied a solution thinking for the drag reduction technical requirements of the potato digger with a novel structure.