CAREER: Nonlinear Mechanics and Aeroelastic Stability of High-Speed Rotating Disks and Translating Webs

文摘：利用计算、分析和实验技术，结合非线性柔性转盘和薄平动腹板与三维剪切流相互作用的最新模型，研究了高速转盘和平动腹板等二维陀螺系统的非线性振动和气动弹性稳定性。研究的目的是识别参数空间中气动弹性颤振发生的区域，并研究这类二维陀螺系统颤振后复杂的非线性模态相互作用。研究结果将直接导致对以下因素的基本了解：(I)限制旋转或运输速度以及(Ii)导致颤振不稳定，并将对信息存储和合成材料处理技术的未来设计至关重要，例如磁性硬盘驱动器、光盘驱动器、数据存储磁带、打印以及纸张、纺织、塑料和金属箔处理系统。教育计划侧重于PI目前在五个关键领域的活动，以整合研究、教育和产业拓展，其中包括：(I)利用PI与普渡大学工程少数民族和工程女性项目合作的研究，招聘和留住工程学中代表性不足的群体和女性，以及(Ii)通过创建一个新颖的、动手操作的“力学实验室”来增强本科课程。

Abstract:The nonlinear vibrations and aeroelastic stability of two-dimensional gyroscopic systems such as high-speed rotating disks and translating webs are investigated using computational, analytical, and experimental techniques together with state-of-the-art models of nonlinear flexible rotating disks and thin translating webs interacting with three-dimensional shear flows. The research aims to identify regions in parameter space where aeroelastic flutter occurs, and investigate the complex post-flutter nonlinear modal interactions of this category of two-dimensional gyroscopic systems. The results will lead directly to a fundamental understanding of the factors (i) limiting rotation or transport speeds and (ii) causing flutter instabilities and will be critical for the future design of information storage and synthetic material processing technologies such as magnetic hard disk drives, optical drives, data storage tapes, printing, and paper, textile, plastics, and metal foil processing systems. The education plan focuses on the PI's current activities in five key areas for integrating research, education, and industrial outreach, including, amongst others (i) leveraging the PI's research in collaboration with Purdue's Minority in Engineering and Women in Engineering Programs for the recruitment and retention of underrepresented groups and women in engineering, and (ii) enhancing the undergraduate curriculum through the creation of a novel, hands-on "Mechanics Laboratory".