| 基于有限元法的耙齿土壤切削仿真 |
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| 引用本文： | 刘修成,何炎平,赵永生. 基于有限元法的耙齿土壤切削仿真[J]. 水运工程, 2015, 0(1): 32-36 |
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| 作者姓名： | 刘修成 何炎平 赵永生 |
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| 作者单位： | 上海交通大学 船舶海洋与建筑工程学院，上海 200240;上海交通大学 船舶海洋与建筑工程学院，上海 200240;上海交通大学 船舶海洋与建筑工程学院，上海 200240 |
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| 摘 要： | 针对耙吸挖泥船耙齿切削土壤的问题,提出了基于有限元的数值模拟方法。建立了耙齿和土壤的三维力学分析模型,充分考虑到土体的黏塑性并将修正的Drucker-Prager土壤模型作为土体的非线性有限元模型。利用LS-DYNA软件的动态显式算法对过程进行模拟,分析了不同切削深度以及不同切削速度下所得到的切削阻力,并通过理论方法对结果进行对比分析,验证了ALE(Arbitrary-Lagrange-Euler)算法在切削大变形问题上的可靠性,为耙齿进一步研究奠定基础。
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| 关 键 词： | 耙齿；土壤切削；ALE算法；切削阻力 |
Simulation of soil cutting using rake based on FEM |
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| LIU Xiu-cheng,HE Yan-ping and ZHAO Yong-sheng. Simulation of soil cutting using rake based on FEM[J]. Port & Waterway Engineering, 2015, 0(1): 32-36 |
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| Authors: | LIU Xiu-cheng HE Yan-ping ZHAO Yong-sheng |
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| Affiliation: | School of Naval Architecture,Ocean & Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China;School of Naval Architecture,Ocean & Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China;School of Naval Architecture,Ocean & Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China |
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| Abstract: | This paper presents a numerical simulation method based on FEM for the problem of soil cutting using the rake,establishes the three dimensional analytical model for both the rake and soil,taking the visco-plasticity of soil into full consideration and using the revised Drucker-Prager model as the soil model.The simulation utilizes the dynamic explicit algorithm of LS-DYNA software to analyze the cutting resistance at different cutting velocities and depths,and compares the results with theoretical ones,which confirms that the Arbitrary-Lagrange-Euler (ALE) method can be reliable in dealing with the problem of soil tool interaction and lays a foundation for further study in the rake design. |
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| Keywords: | rake soil cutting ALE cutting resistance |
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