Instabilities Arising From the Frictional Interaction of a Pin-Disk System Resulting in Noise Generation
Instabilities Arising From the Frictional Interaction of a Pin-Disk System Resulting in Noise Generation
复制标题
销盘系统的摩擦相互作用引起的不稳定性导致噪音的产生
DOI：
10.1115/1.3438879
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
C. K. Lee
中科院分区：
文献类型：
--
作者：
S. Earles;C. K. Lee
支撑在柔性悬臂上的钢销压在以均匀角速度旋转的薄钢盘上。销中心轴相对于圆盘平面的方向、销支撑的弯曲和扭转刚度、圆盘的刚度以及合成相互作用力的作用线都被证明会影响产生的自感耦合频率和模式。根据三自由度销子子系统和单自由度盘元件对实验布置进行的分析表明，系统对于某些变量组合是不稳定的。这些不稳定性被证明属于一类“几何引起的”或“运动学约束”的不稳定性。实验装置内的尖叫噪声产生区域与理论上预测的振荡不稳定区域相对应。产生的噪音类似于盘式制动器的尖叫声，因此这项工作进一步加深了对这一实际问题的理解。
A steel pin, supported on a flexible cantilever, is pressed against a thin steel disk which rotates at a uniform angular speed. The orientation of the pin’s central axis to the plane of the disk, the bending and torsional stiffnesses of the pin support, the stiffness of the disk, and the line of action of the resultant interactive force are all shown to affect the self-induced coupled frequencies and modes generated. The analysis of the experimental arrangement in terms of a three-degree-of-freedom pin subsystem and a single-degree-of-freedom disk element suggests that the system is unstable for certain combinations of the variables. The instabilities are shown to belong to a class of “geometrically induced” or “kinematic constraint” instability. The region of squeal-noise generation within the experimental rig is shown to correspond to the oscillatory unstable region predicted theoretically. The noise generated is similar to disk-brake squeal, and so the work furthers the understanding of this practical problem.