| 振动压实中的次谐波振动与混沌 |
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| 引用本文： | 管迪,陈乐生.振动压实中的次谐波振动与混沌[J].筑路机械与施工机械化,2007,24(6):59-61. |
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| 作者姓名： | 管迪 陈乐生 |
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| 作者单位： | 福州大学,机械工程及自动化学院,福建,福州,350002 |
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| 摘 要： | 建立了一种土壤非线性力学模型,可以反映土壤弹塑性变形和振动轮跳振等不同压实阶段特点。数值仿真表明,土壤弹塑性变形阶段,系统做周期运动,振动轮起跳后产生次谐波分量,减小阻尼会使谐波分量增加,在一定条件下出现分岔并引发混沌。对研究压实作业中如何产生混沌运动和避免振动轮跳振提供了理论依据。
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| 关 键 词： | 振动压实 次谐波 混沌 跳振 |
| 文章编号： | 1000-033X（2007）06-0059-03 |
| 修稿时间： | 2006-05-08 |
Subharmonics and Chaos in Vibratory Compaction |
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| GUAN Di,CHEN Le-sheng.Subharmonics and Chaos in Vibratory Compaction[J].Road Machinery & Construction Mechanization,2007,24(6):59-61. |
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| Authors: | GUAN Di CHEN Le-sheng |
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| Institution: | College of Mechanical Engineering, Fuzhou University, Fuzhou, 350002, China |
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| Abstract: | A nonlinear soil dynamic model is built. This model is able to explain the dynamic characteristic of different compaction process including elastic-plastic range of soil and jump vibration range. By means of numerical simulation the dynamics of system is studied. The system represents period motions during the elastic-plastic range of soil. Sub-harmonics may occur while the drum is taking a jump vibration, and decreasing of damping may increase the sub-harmonics. Under some conditions, bifurcation and chaos will be induced. In theory the conclusion of this article is valuable to the investigation of chaos in vibratory compaction and avoidance of jump vibration. |
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| Keywords: | vibratory compaction sub-harmonics chaos jump vibration |
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