Plenary Lecture
Study on Interaction Aerodynamics of Vehicle-Bridge System under Wind Actions
Professor J. D. Yau
Co-author: Shyh-Rong Kuo
Department of Architecture
Tamkang University
TAIWAN
E-mail: jdyau@mail.tku.edu.tw
Abstract: In this study, a computational framework for performing vehicle-bridge interaction dynamics under wind actions was presented using iterative method. To investigate the interaction aerodynamics of a vehicle running on a bridge in cross wind actions, a 3D finite element model of a cable-stayed bridge subjected to moving vehicles is represented. Here, the cross winds including both steady and unsteady aerodynamic forces acting on the vehicle-bridge system are generated using spectral representation method and simulated (measured) aerodynamic coefficients along the bridge in the temporal and spatial domain. With the simulated wind forces, the vehicle-bridge system in cross winds can be composed into two subsystems: bridge-wind subsystem and vehicle-wind subsystem, and then an iterative schemes is employed to compute the interaction response between the two subsystems. By the present vehicle-bridge-wind coupling model, the aerodynamic response of a vehicle running on a cable-stayed bridge in cross winds will be presented in numerical examples.
Brief Biography of the Speaker: Dr. J.D. Yau got his Ph.D. from National Taiwan University (NTU) in 1996. After serving as a chair-engineer at the Kuan-Tech Engineering Consultants Co. at Taichung in Taiwan (1997-1999), he joined the faculty at TamKang University (1999) where he has served as Assistant Professor (1999-2003), Associate Professor (2003-09), and Chair (2004-2007) in the Department of Architecture and Building Technology. In 2010, Dr. Yau became a Professor of Tamkang University, and an Adjunct Professor of Zhejiang University (2011-2013), a Visiting Professor of East China Jiao Tong University in China (2011-2014). He is also a Supervisor of the Chinese Taiwan Association of Wind Engineering (CTAWE, 2014-2016). Dr. Yau has published over 60 referred journal papers and articles. His research area of interest is centered on:
1. Interaction aerodynamics of vehicle-bridge system
2. Maglev dynamics of vehicle/guideway interaction
3. Vibration problems of high speed rails
Selected publications (2010~2014):
1. Yau, J.D*. (2010), Response of a maglev vehicle moving on a two-span flexible guideway, J. of Mech., 26(1), 95-103.
2. Yau, J.D*. (2010), Aerodynamic vibrations of a maglev vehicle running on flexible guideways under oncoming wind actions, J. Sound & Vibration, 329, 1743-1759.
3. Yang, Y.B. and Yau, J.D*. (2011), An iterative interacting method for dynamic analysis of the maglev train–guideway/foundation–soil system, Engineering Structures, 33, 1013-1024.
4. Yau, J.D. (2012). Lateral vibration control of a low-speed maglev vehicle in cross winds. Wind and Structures, 15(3), pp263-283.
5. Kuo, S.R.and Yau, J.D*. (2011), A fast and accurate step-by-step solution procedure for direct integration, Intl. J. Struct. Stab. and Dyna., 11(3) 473-493.
6. Kuo, S.R., Yau, J.D*, and Yang, Y.B. (2012), A robust time-integration algorithm for solving nonlinear dynamic problems with large rotations and displacements, Intl. J. Struct. Stab. and Dyna., 12(6) 1250051 (24pages).
7. Yau, J.D. (2013) Wave passage effects on the seismic response of a maglev vehicle moving on multi-span guideway. Latin American Journal of Solids and Structures, 10(5) 981 – 1000.
8. Yau, J.D. and Fryba, L. (2014), A Quasi-Vehicle/bridge Interaction Model for High Speed Railways, Journal of Mechanics (in print).