U.S.-Germany Cooperative Research on Friction-Induced Vibration and Chaos in Nonlinear Systems

9311774 Ibrahim该奖项支持Raouf Ibrahim教授和韦恩州立大学的一名研究生与德国汉诺威大学的Karl Popp教授及其团队合作进行机械工程研究。 他们对摩擦对非线性系统动力学行为的影响有着共同的兴趣。 利用德国小组的专业知识，他们将进行实验，以测量旋转机械中固定和非固定相对旋转运动下金属摩擦界面的摩擦特性。 这将使合作研究小组能够开发具有非线性和随机特性的摩擦模型。 然后，韦恩州立大学的研究小组将通过对离散旋转系统中的粘滑运动进行分析和数值研究来检验这些模型。 这项研究解决了与滑动表面振动和磨损相关的一组重要问题。 不稳定性和摩擦的不良影响在几乎所有的机械和机械系统中都是常见的。 这项研究的结果将使这些研究人员开发的滑动表面的摩擦引起的噪音的设计准则。这将与例如用于高速机械的改进的旋转轴承的设计相关。 ***

9311774 Ibrahim This award supports Professor Raouf Ibrahim and a graduate student of Wayne State University to collaborate in mechanical engineering research with Professor Karl Popp and his group at the University of Hannover, Germany. They share an interest in the influence of friction on the dynamic behavior of nonlinear systems. Utilizing the expertise of the German group, they will conduct experiments to measure the friction characteristics of metallic friction interfaces under stationary and non-stationary relative rotational motion in rotating machinery. This will enable the collaborating research groups to develop friction models with nonlinear and random characteristics. Then the group at Wayne State will test these models by carrying out analytical and numerical studies of stick-slip motions in discrete rotating systems. This research addresses an important group of problems related to vibration and wear in sliding surfaces. Undesirable effects of instability and friction are common in virtually all machinery and mechanical systems. The results of this research will enable these investigators to develop design guidelines for sliding surfaces free of friction-induced noise. This would be relevant, for example, to the design of improved rotating bearings for high speed machinery. ***