论文标题
通过访问滚动选项来调整摩擦噪声
Tuning of friction noise by accessing the rolling-sliding option
论文作者
论文摘要
机械系统中的可变功率传输通常是通过使用干摩擦的设备（例如离合器和制动器）来实现的。在这些系统中，电力传输的可变性是通过参与和解开摩擦板来实现的。尽管通常使用，但这种使耦合嘈杂的方法不如其电气类似物那样通用。另一种方法是间歇性改变摩擦力。在本文中，我们展示了一种自组织的方法，可以调整两个表面之间相对运动的摩擦耦合中的噪声。这是通过利用由球的摩擦相互作用产生的复杂性来实现的，这些相互作用放在表面之间的圆形凹槽中。耦合中的松弛程度与球在滚动状态和滑动状态之间过渡的速度有关。如果移动表面柔软并且很难静态表面，我们表明，随着球的填充分数增加，滚动和滑动在静态表面之间的过渡，使滚动和滑动在移动表面之间的过渡。结果，耦合中的噪声对于中间的大小填充分数都很大。相比之下，如果动态pate坚硬，耦合中的噪声随球的填充分数而单调降低，则将静态表面的滑动抑制。
Variable power transmission in mechanical systems is often achieved by devices, e.g., clutches and brakes, that use dry friction. In these systems, the variability in power transmission is brought about by engaging and disengaging the friction plates. Though commonly used, this method of making the coupling noisy is not as versatile as their electrical analog. An alternative method would be to intermittently vary the frictional force. In this paper, we demonstrate a self-organized way to tune the noise in the frictional coupling between two surfaces which are in relative motion with each other. This is achieved by exploiting the complexity that arises from the frictional interaction of the balls which are placed in a circular groove between the surfaces. The extent of floppiness in the coupling is related to the rate at which the balls make transitions between their rolling and sliding states. If the moving surface is soft and the static surface is hard we show that with increasing filling fraction of the balls the transitions between rolling and sliding against the static surface give way to the transitions between rolling and sliding against the moving surface. As a consequence, the noise in the coupling is large for both small and large filling fraction with a dip in the middle. In contrast, the sliding with the static surface is suppressed if the moving pate is hard and the noise in the coupling decreases monotonically with the filling fraction of the balls.
