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開溝器工作阻力的離散元法仿真分析
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of the Resistances Applied on Furrow Openers
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    摘要:

    建立了芯鏵式開溝器和播種施肥開溝器與土壤顆粒的二維離散元法分析模型，采用離散元法研究開溝器的工作過(guò)程及工作阻力，通過(guò)改變開溝器的CAD模型和土壤顆粒參數(shù)，分析不同條件下開溝器的工作阻力。在室內(nèi)土槽進(jìn)行了2種開溝器的工作阻力測(cè)試，并將測(cè)試結(jié)果與開溝器工作阻力的離散元法計(jì)算結(jié)果進(jìn)行了比較，兩者的變化趨勢(shì)基本一致，相對(duì)誤差在10%～20%之間，由此初步證明了采用離散元法分析開溝器工作過(guò)程和工作阻力的可行性，為開溝器的研究和優(yōu)化設(shè)計(jì)提供了一種新方法。

    Abstract:

    In order to analyze the factors that affect the performance of a furrow opener, the two-dimensional DEM (discrete element method) analyzing models of two types of furrow openers and soil particles were built up. Through changing the CAD models of furrow openers, for each type of furrow openers, the operating processes and resistances in three kinds of soils with different moisture content at three different velocities and depths were analyzed by using the DEM. The performance of the openers was tested at each operating states in lab. The simulation results is in good correlation with the experimental results and the relative errors are within 10%～20%. It can be proved that it’s feasible and favourable to analyze the performances of furrow openers by using the DEM and it provides a new method to study and design furrow openers. 

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于建群,錢立彬,于文靜,潘世強(qiáng),方瑛,付宏.開溝器工作阻力的離散元法仿真分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(6):53-57. of the Resistances Applied on Furrow Openers[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):53-57.

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