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犁面前部土體表層位移場(chǎng)分布有限元分析
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國(guó)家自然科學(xué)基金資助項(xiàng)目(50675107)


Analysis of Distribution of Displacement on Soil Surface in Front of Plow with FEM
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    摘要:

    由三坐標(biāo)測(cè)量機(jī)獲得犁體曲面的點(diǎn)云數(shù)據(jù)，然后利用Pro/E 的逆向造型工具反求出犁體曲面，并將反求模型導(dǎo)入ANSYS/LS-DYNA軟件中完成犁體耕作過程的動(dòng)力學(xué)模擬仿真。仿真結(jié)果表明，在與土體-犁體接觸點(diǎn)垂直的平面內(nèi)，土體位移以與犁體接觸點(diǎn)為中心呈環(huán)帶狀向四周逐漸減小。并將模擬結(jié)果與土槽試驗(yàn)的結(jié)果進(jìn)行對(duì)比分析，驗(yàn)證了模擬過程的可行性。

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    The plough surface was re-formed by using Pro/E’s functions based on measured points, which were scaled with 3-D coordinate scale instrument. And then ANSYS/LS-DYNA software was used to carry out the turning dynamics simulation of the tilling plough. The direction of soil velocity was vertical to the surface of plough, and its distribution was like radiating. The distribution of equivalent stress was like isoline, and the data was becoming smaller from the contact point to outer. The results of simulation were verified by the data of experiments in soil bin.

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翟力欣,姬長(zhǎng)英,丁啟朔,郁隱梅.犁面前部土體表層位移場(chǎng)分布有限元分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(10):45-50. Zhai Lixin, Ji Changying, Ding Qishuo, Yu Yinmei. Analysis of Distribution of Displacement on Soil Surface in Front of Plow with FEM[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(10):45-50.

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