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一刀切斷甘蔗動力學(xué)仿真試驗
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廣西自然科學(xué)基金資助項目(0832028);廣西科技創(chuàng)新能力與條件建設(shè)項目(0842006)


Dynamic Simulation Experiment of One-blade Cutting Sugarcane Process
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    摘要:

    采用ANSYS/LS-DYNA顯式動力學(xué)仿真軟件，建立甘蔗—切割器系統(tǒng)的動力學(xué)仿真模型，且進行了甘蔗切割物理試驗驗證。利用四因子二次通用旋轉(zhuǎn)組合設(shè)計方法和甘蔗—切割器系統(tǒng)仿真模型進行一刀切斷甘蔗的仿真試驗，建立影響因素與切割力和剪應(yīng)力的數(shù)學(xué)模型，研究了切割力和剪應(yīng)力各影響因素及其交互作用的影響規(guī)律，且對影響因素進行優(yōu)化，獲得了一刀切斷甘蔗時可靠性為95%的最佳切割力總區(qū)間。結(jié)果表明，刀片刃角為17.5°，切割角為27.73°，刀盤傾角為28°，切割速度為16m/s時，可靠性為95%的最佳切割力范圍為235.82~297.98N。

    Abstract:

    By using explicit dynamic simulation software ANSYS/LS-DYNA, the sugarcane-cutter system dynamics simulation model was established. The precision of the simulation model was verified by physical experiment. By using four-factor of second order general rotation composite design and the sugarcane-cutter system dynamics simulation model, the dynamics simulation of one-blade cutting sugarcane was carried out. The mathematical model of the influencing factors, cutting forces and shear stresses was established. The influence law of the factors and their interaction were analyzed, and the respective optimization of the factors was gained. The optimal cutting force interval with 95% reliability was obtained. The results showed that when knife-edge angle of blade is 17.5°, cutting angle of blade is 27.73°, obliquity of disc cutter is 28° and cutting velocity is 16m/s, the optimal cutting force interval with 95% reliability is from 235.82N to 297.98N.

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周仕城,楊望,楊堅,梁兆新,莫建霖.一刀切斷甘蔗動力學(xué)仿真試驗[J].農(nóng)業(yè)機械學(xué)報,2011,42(1):68-73. Zhou Shicheng, Yang Wang, Yang Jian, Liang Zhaoxin, Mo Jianlin. Dynamic Simulation Experiment of One-blade Cutting Sugarcane Process[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(1):68-73.

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