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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振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 44-46.

论文

离心场中双自由度振动系统的动频和极化运动性质

刘占芳;张凯;颜世军;冯晓伟

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DYNAMIC FREQUENCY AND POLARIZED MOTION PROPERTY OF SPRING-MASS VIBRATION SYSTEM WITH TWO DEGREES OF FREEDOM IN A CENTRIFUGAL FIELD

Liu Zhanfang; Zhang Kai; Yan Shijun; Feng Xiaowei

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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

Abstract

Two dynamic frequencies and two complex modes are given out for a spring-mass vibration system with two degrees of freedom in a centrifugal field. The dynamic frequencies of the centrifugal vibration system are related to system rotation speed whereas to centrifugal softening and Coriolis force effects. Coriolis force leads to system vibration with complex modal vector and polarized circle motion of a mass. And owing to the motion coupling but not real physical damping, does not produce system attenuating vibration. Thus, the corresponding circle motion trajectory of mass is always kept for the single complex modes of rotating system

导出引用

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

Liu Zhanfang;Zhang Kai;Yan Shijun;Feng Xiaowei. DYNAMIC FREQUENCY AND POLARIZED MOTION PROPERTY OF SPRING-MASS VIBRATION SYSTEM WITH TWO DEGREES OF FREEDOM IN A CENTRIFUGAL FIELD[J]. Journal of Vibration and Shock, 2011, 30(6): 44-46