知识与财富的链接
应用Solidworks软件建立玉米秸秆—切割刀片参数化模型,借助LS-DYNA971非线性有限元软件模拟切割刀片切割玉米秸秆的过程。玉米秸秆切割的有限元数值模拟能降低试验成本和缩短试验时间,可视化数值模拟过程可为玉米秸秆收获机械的设计提供理论参考。利用参数化模型特点,通过改变玉米秸秆直径大小、秸秆含水率、切割方式和刀片刀端线速度进行正交仿真试验。结果表明：对切割力来说,含水率对其影响最显著,其它影响依次为：秸秆直径、切割方式、刀片刀端线速度;对切割功耗来说,含水率影响最显著,其次分别为：秸秆直径、刀片刀端线速度、切割方式。经正交综合平衡法分析可知：当刀片刀端线速度为28 m·s-1,采取滑切方式,玉米秸秆含水率、直径分别为45%、26 mm时为最优。玉米秸秆—切割刀片动力学可视化数值模拟仿真模型的构建和分析, 对玉米秸秆收获机械设计具有重要的参考价值。
The parameters model of corn stalk—cutter cutting simulation was built by using the software Solidworks, the process of cutting corn stalk was simulated with the help of non linear finite element software LS-DYNA971. Finite element numerical simulation of the corn stalk cutting can reduce the experiment cost, shorten the test time and provide theoretic references for the design of the har vesting machine of corn stalk. Using the characteristics of parameterized model, orthogonal simulated test was taken on the basis of changing diameter, moisture content of corn stalk, cutting way and cutter moving speed. The results showed: From the cutting force, the moisture content was the most significant effect, other impacts in sequence as diameter of corn stalk, cutting way and cutter movin g speed. Through the analysis by the orthogonal comprehensive equation method, we have known it was the best when the cutter linear speed was 28 m·s-1, using the sliding cutting, the moisture content and diameter wast 45% and 26 mm respectively. The establishment and analysis of the dynamic visual numerical simulation model for the corn stalk—cutter would have very important referential values for the design of corn stalk harvesting machines.
