摘要
以仿生推土板为研究对象,采用有限元法分析其工作过程中切削角对工作阻力的影响,并与圆弧推土板作对比,分析仿生推土板的减阻效果;设计制作了相关推土板的实物模型,进行室内土槽试验,验证有限元分析结果的正确性。研究结果表明,仿生推土板减阻效果明显,并且两种方法测定的结果变化趋势吻合良好,在推土板耕深为30mm,工作速度分别为0.08m/s、0.16m/s时,仿生推土板的减阻率均在切削角为55°时达到最大,有限元模拟和土槽试验平均减阻率分别为42.50%和40.20%。
This paper takes the bionic bulldozing plates as research object.The finite element method was used to simulate the working process in order to study the influence of cutting angle on soil resistance of the bionic bulldozing plates,as well as to study the significance of soil resistance reduction of the bionic bulldozing plates compared with the arc bulldozing plates.In accordance with the simulation results,a series of bulldozing plates of varying design were manufactured.An indoor soil bin experiment was used to measure their operating resistance and validate the results of the FEM analysis.The result showed that the bionic bulldozing plates have an obvious effect of decreasing resistance,and there was a same varying trend between the operating resistance data obtained by the finite element method and soil bin test.With the tillage depth of 30 mm and the fixing operating speed of 0.08m/s,0.16m/s,the resistancereduction rate of the bionic bulldozing plates is maximized when the cutting angle is 55°.Average operating resistance of finite element simulation for the bionic bulldozing plates reduced 42.50%than for the arc bulldozing plates,while average operating resistance of soil bin soil reduced 40.20%.
出处
《中国农机化学报》
2016年第4期11-13,18,共4页
Journal of Chinese Agricultural Mechanization
基金
国家自然科学基金资助项目(51175150)
关键词
推土板
工作阻力
有限元
土槽试验
bulldozing plates
soil resistance
finite element
soil bin experiment
