| 滚石冲击碰撞恢复系数研究 |
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| 引用本文： | 何思明,吴永,李新坡.滚石冲击碰撞恢复系数研究[J].岩土力学,2009,30(3):623-627. |
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| 作者姓名： | 何思明 吴永 李新坡 |
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| 作者单位： | 中国科学院,山地灾害与地表过程重点实验室,成都,610041;中国科学院,水利部成都山地灾害与环境研究所,成都,610041 |
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| 基金项目： | 国家自然科学基金，交通部西部科技项目 |
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| 摘 要： | 在研究滚石的运动规律过程中，滚石的碰撞恢复系数是重要的控制参数，它不仅与滚石的冲击速度、质量有关，还与滚石、坡面覆盖层的物理力学性质密切相关，目前尚无合理的计算理论，这是滚石灾害研究的一个难点问题。根据Hertz接触理论、Cattaneo &; Mindlin切向接触理论，在考虑材料弹塑性特性的基础上研究了滚石法向碰撞恢复系数和切向碰撞恢复系数的计算模式，给出了具体的计算公式，并阐明了影响滚石碰撞恢复系数的主要控制因素。通过一算例的计算分析并与已有结论的比较，表明该计算模式的合理性。
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| 关 键 词： | 滚石 碰撞恢复系数 接触力学 冲击 |
| 收稿时间： | 2007-07-30 |
Research on restitution coefficient of rock fall |
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| HE Si-ming,WU Yong,LI Xin-po.Research on restitution coefficient of rock fall[J].Rock and Soil Mechanics,2009,30(3):623-627. |
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| Authors: | HE Si-ming WU Yong LI Xin-po |
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| Institution: | 1. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu 610041, China; 2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China |
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| Abstract: | In studying the motion law of rock-fall, the restitution coefficient is an important control parameter. It not only has something to do with stone’s speed and quality but also is closely related with stone and overlay layer’s physico-mechanical properties. However, currently there is no reasonable calculation theory about restitution coefficient which will still be a difficult problem in studying. According to Hertz contact theory and Cattaneo &; Mindlin tangential contact theory, considering the elasto-plastic properties of materials, the calculation model of restitution coefficient both in normal and tangential impacting direction is studied. Then a specific formula is given, and some major factors about the coefficient are also illustrated. At last, by calculating an example and comparing with the existed conclusion, the theory is proved to be reasonable. |
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| Keywords: | rock fall restitution coefficient contact mechanics impact |
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