| 离心场中双自由度振动系统的动频和极化运动性质 |
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| 引用本文： | 刘占芳,张凯,颜世军,冯晓伟.离心场中双自由度振动系统的动频和极化运动性质[J].振动与冲击,2011,30(6):44-46. |
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| 作者姓名： | 刘占芳 张凯 颜世军 冯晓伟 |
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| 作者单位： | 重庆大学资环学院工程力学系，重庆市，400030 |
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| 基金项目： | 重庆市科技攻关计划资助项目 |
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| 摘 要： | 双自由度的弹簧-质量振动系统在离心场中存在两阶动频和两阶复模态。振动离心系统的动频关联于旋转系统的转速，并受到离心软化和科氏力的影响。科氏项导致系统出现复模态矢量，质量点形成极化的圆周运动轨迹，反映了旋转系统的运动耦和而非物理阻尼，它不引起系统自由振动的衰减，单一复模态对应的质量点的圆周运动轨迹保持不变
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| 关 键 词： | 振动离心系统 离心软化 科氏力 复模态矢量 圆周运动 |
| 收稿时间： | 2009-12-17 |
| 修稿时间： | 2010-3-15 |
Eigen frequency and polarized motion property of spring-mass vibration system with two degrees of freedom in centrifugal field |
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| LIU Zhan-fang,ZHANG Kai,YAN Shi-jun,FENG Xiao-wei.Eigen frequency and polarized motion property of spring-mass vibration system with two degrees of freedom in centrifugal field[J].Journal of Vibration and Shock,2011,30(6):44-46. |
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| Authors: | LIU Zhan-fang ZHANG Kai YAN Shi-jun FENG Xiao-wei |
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| Affiliation: | Department of Engineering Mechanics, School of Resource and Environmental Science, Chongqing Universtity, Chongqing, 400030 |
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| Abstract: | Two eigen frequencies and two complex modes were given out for a spring-mass vibration system with two degrees of freedom in a centrifugal field.The eigen frequencies of the centrifugal vibration system are related to system rotating speed as well as to centrifugal softening and Coriolis force effects.Coriolis force leads to system vibration with complex modal vector and polarized circle motion of mass point,which is not a real physical damping,so does not produce attenuation of system vibration.Thus,the ci... |
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| Keywords: | centrifugal vibration system centrifugal softening Coriolis force complex modal vector circle motion |
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