| 吴志强,吕和祥.一种特殊瞬态动力学现象释疑[J].计算力学学报,2002,19(2):247~249 |
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| 一种特殊瞬态动力学现象释疑 |
| xplanation on a special phenomenon in transient dynamics |
| 修订日期：2000-08-15 |
| DOI：10.7511/jslx20022054 |
| 中文关键词: 瞬态动力学,非线性 |
| 英文关键词:transient dynamics,nonlinearly, |
| 基金项目:国家自然科学基金 (19990 5 10 )，(10 10 2 0 14 )国家重点基础研究专项经费 (G19980 2 0 3 16)，天津市自然科学基金 (0 13 60 4711)资助 |
| 吴志强 吕和祥 |
天津大学力学系 天津300072
(吴志强，陈予恕，孙洪军)
，大连理工大学工程力学系 大连116023(吕和祥)
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| 摘要点击次数: 1633 |
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| 中文摘要: |
| 引入瞬态平衡点的概念 ,来解释一种简单的摆式减振器模型中的瞬态动力学行为中的一种特殊现象 :即振子从开始小幅振动突然增大最后达到大幅振动 ,而减振摆也从铅垂位置附近的小幅振动过渡到绕悬挂点的圆周运动。分析表明 ,产生此现象的原因是系统瞬时平衡点的剧烈变化 |
| 英文摘要: |
| The transient dynamics of an externally excited oscillator attached with a pendulum as the suppressor is studied. With badly chosen parameters, the vibration of oscillator abruptly increases after a while of small amplitude motion, at the same time, the pendulum begins to rotate about the attached point. To explain this special phenomenon, the concept of transient equilibrium is introduced. It is shown that the transient motion of systems always oscillates near its transient equilibrium, that the reason of the phenomenon is the change of the transient equilibrium. |
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