| 液压挖掘机振动掘削减阻机理研究 |
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| 引用本文： | 朱建新,赵崇友,郭鑫.液压挖掘机振动掘削减阻机理研究[J].岩土力学,2007,28(8):1605-1608. |
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| 作者姓名： | 朱建新 赵崇友 郭鑫 |
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| 作者单位： | 中南大学,机电工程学院智能机械研究所,长沙,410083 |
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| 基金项目： | 国家高技术研究发展计划(863计划);教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 铲刃以振动的方式作用于土壤,可以有效地降低液压挖掘机挖掘作业时的阻力。从理论上研究了振动掘削岩土的减阻机理,土壤剪切试验结果表明,振动载荷能够使土壤的内摩擦角变小、抗剪强度下降、最大主应力值减小,从而导致挖掘阻力降低;对土壤在静态载荷和振动载荷作用下的失效过程进行了对比仿真实验研究,可知土壤在振动加载的条件下强度显著下降,并提前于相同条件的静态加载而破坏,同时跟踪X方向的载荷发现,振动掘削最大掘削阻力可降低50%。
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| 关 键 词： | 液压挖掘机 振动掘削 机理研究 土壤强度 最大主应力 |
| 文章编号： | 1000-7598-（2007）08-1605-04 |
| 收稿时间： | 2005-09-05 |
| 修稿时间： | 2005-09-05 |
Research on mechanism of vibratory excavation of hydraulic excavators |
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| ZHU Jian-xin,ZHAO Chong-you,GUO Xin.Research on mechanism of vibratory excavation of hydraulic excavators[J].Rock and Soil Mechanics,2007,28(8):1605-1608. |
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| Authors: | ZHU Jian-xin ZHAO Chong-you GUO Xin |
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| Institution: | Intelligent Mechanical Institute, School of Mechanical and Electronics Engineering, Central South University, Changsha 410083, China |
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| Abstract: | The digging resistance of soil can be reduced greatly if the bucket is vibrating when the hydraulic excavator is working.The resistance-reducing mechanism of vibratory excavation is researched theoretically.The soil cutting experiment indicates that the interior friction angle and the shear intensity of soil is reduced;and the maximum principal stress is decreased due to the vibration load;it induces the decrease of digging resistance.The comparison simulation experiment research on the failure process of soil under static load and vibratory load has been carried out.The result shows that soil intensity is obviously decreased under vibratory load and destroyed earlier than that of static load.The digging resistance reduced 50 % under vibratory excavation when tracking the load in X-direction. |
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| Keywords: | hydraulic excavators vibratory excavation mechanism researching soil intensity maximum principal stress |
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