木薯仿生挖掘铲的设计及有限元静力学分析

Design and Finite Element Static Analysis of Cassava Bionic Digging Shovel

针对木薯植株在被收获过程当中,挖掘铲容易出现自身质量过大、碎土性能不佳、减轻土壤黏性差等问题,基于仿生学理论,设计了一种土拨鼠仿生挖掘铲。首先用MATLAB对土拨鼠爪趾进行曲线拟合得到其多项式函数,再在SolidWorks里面设计出土拨鼠仿生挖掘铲的三维模型。最后导入到ANSYS Workbench中进行有限元静力学仿真分析。通过对比普通挖掘铲、实心仿生挖掘铲、空心仿生挖掘铲的应力应变情况,选择出一种满足设计要求的实心挖掘铲。对比分析结果得到:实心仿生挖掘铲拥有良好的力学性能、使用寿命及较好的质量。

In the process of cassava plant harvesting,the digging shovel is prone to the problems of excessive weight,poor soil crushing performance and poor soil viscosity.Based on the bionics theory,a bionic digging shovel of woodchuck is designed.Firstly,the polynomial function of the claw toe of the groundhog is obtained by curve fitting with MATLAB,and then the three-dimensional model of the bionic digging shovel of the groundhog is designed in SolidWorks.Finally,it is imported into ANSYS Workbench for finite element static simulation analysis.By comparing the stress and strain of ordinary digging shovel,solid bionic digging shovel and hollow bionic digging shovel,a solid digging shovel meeting the design requirements is selected.The results show that the solid bionic excavator has good mechanical properties,service life and good quality.