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Applied Physics Seminar: "Advanced Marine Structures in Multiphase Flows"

Prof. Yin Lu Young
Wednesday, November 7, 2018
12:00-1:00 PM
335 West Hall Map
In recent years, there has been an increased interest in the use of advanced materials for maritime applications, including propellers, turbines, hydrofoils, control surfaces, energy saving and energy harvesting devices. Compared to traditional metallic alloys, advanced polymer composites offer the advantage of higher strength-to-weight ratio, better fatigue characteristics, higher durability, and better resistance to sea water corrosion and other chemical agents. Moreover, active materials, sensors, and actuators can be embedded inside composites to develop multi-functional marine structures that can not only bare load, but also provide improved functionality, including the ability to enable in situ flow and structural health monitoring, vibration and noise control, as well as renewable energy harvesting. In particular, advanced marine structures can be designed to enable passive or active tailoring of the cavitation/ventilation inception speed, cavity size, and cavity shedding frequencies. Although there exists many advantages, there are many challenges to the design, analysis, testing, and operation of multi-functional marine structures. Any structure that is designed to interact with the surrounding multiphase flow are intrinsically more sensitive to changes in flow conditions and rapid body manoeuvers. Moreover, the system natural frequencies and damping characteristics may vary with proximity to free surface, forward speed, waves, cavitation and ventilation. Lock-in of the flow excitation frequency with one of the body natural frequencies or their harmonics can lead to dynamic load amplifications, flow-induced vibrations and noise, flutter and even parametric resonance. Nonlinear feedback between the surrounding multiphase flow and body deformations, as well as hysteresis fluid-structure interaction behaviour further complicate flow control methodologies. Hence, the focus of this talk is to advance the fundamental understanding of the fluid-structure interaction response and stability of advanced marine structures in complex, multiphase flows, and to explore innovative methods to develop multi-functional marine structures to sense and control cavitation and/or ventilation.

Prof. Young a Professor at the Department of Naval Architecture and Marine Engineering and the Director of the Marine Hydrodynamics Laboratory at the University of Michigan. Prof. Young is internationally well known for her work on modelling of adaptive composite marine propulsors and turbines. Prof. Young is a member of the Seakeeping Committee for the International Towing Tank Committee (ITTC), and a member of the joint ITTC-ISSC Working Group. She was also the Society of Naval Architecture and Marine Engineering representative on the United States National Committee on Theoretical and Applied Mechanics between 2009-2014. Prof. Young is an Associate Editor for the Journal of Ship Research, an Editorial Board Member on Acta Mechanica Sinica, and an Associate Editor for the Journal of Offshore, Mechanics, Artic, and Ocean Engineering. Prof. Young has written over two hundred journal and conference papers in the area of fluid-structure interactions of maritime structures.
Building: West Hall
Event Type: Lecture / Discussion
Tags: Physics, Science
Source: Happening @ Michigan from Applied Physics