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玉米秸稈芯結(jié)構(gòu)建模與徑向壓縮過(guò)程模擬
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）資助項(xiàng)目(2009AA043603);公益性行業(yè)（農(nóng)業(yè)）科研專(zhuān)項(xiàng)資助項(xiàng)目


Structure Modeling and Radial Compression Simulation of Corn Stalk Cores
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    摘要:

    為了深入研究實(shí)芯作物秸稈的壓縮特性，以農(nóng)大108玉米秸稈芯為研究對(duì)象，基于秸稈各向異性、非均質(zhì)、非線性特點(diǎn)，先通過(guò)徑向壓縮試驗(yàn)獲取其粘彈性參數(shù)，然后應(yīng)用ANSYS軟件建立了玉米秸稈芯橫截面圓柱有限元結(jié)構(gòu)模型，并進(jìn)行徑向壓縮過(guò)程和應(yīng)力松弛過(guò)程的數(shù)值模擬。研究表明，五參量廣義麥克斯韋模型能較好地描述玉米秸稈芯應(yīng)力松弛特性，模型擬合參數(shù)的試驗(yàn)值與有限元模擬值誤差均小于10%。試驗(yàn)驗(yàn)證了玉米秸稈芯模擬結(jié)果的可行性和計(jì)算模型的有效性。

    Abstract:

    In order to further understand compression characteristics of the crop straws with core, taking Nongda108 corn stalk cores as object, the viscoelastic parameters were obtained through radial compression test for the crop stalks with core was anisotropic, non-homogeneous and non-linear. The finite element model of the corn stalk core was established with ANSYS. Radial compression and relaxation of corn stalk cores were preceded and simulated. The results showed stress relaxation characteristics of corn stalk cores were depicted by five parameters generalized Maxwell model, and errors between experimental values and finite element simulation values about fitting model parameters were less than 10%. The test approved that the radial compression change curves between test and simulation were accordant, and verified the validity of the simulation results and the feasibility of the calculation model.

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廖娜,黃光群,陳龍健,賀城,韓魯佳.玉米秸稈芯結(jié)構(gòu)建模與徑向壓縮過(guò)程模擬[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(6):117-121. Liao Na, Huang Guangqun, Chen Longjian, He Cheng, Han Lujia. Structure Modeling and Radial Compression Simulation of Corn Stalk Cores[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(6):117-121.

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