Title :
Large amplitude oscillatory motion of a moored caisson under strong current and wind in Yangtze River
Author :
Gu, Xie-Chong ; Ma, Ning
Author_Institution :
State Key Lab. of Ocean Eng., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A moored rectangular caisson, being grounded to riverbed of Yangtze River, is considered. Its motions induced by the environmental wind and current are numerically simulated by means of some commercial software in time domain. It is found that amplitudes of oscillatory motions are large up to several meters and the main cause of such violent motions is due to vortices shedding from the caisson under the effect of water current. Simulated motion trajectories of the caisson centre point at several different current speeds are graphically shown. Optimization of the mooring system beforehand seems necessary in order to improve grounding accuracy.
Keywords :
aerodynamics; fluid oscillations; foundations; geotechnical engineering; hydrodynamics; structural engineering; time-domain analysis; vortices; Yangtze river; caisson; environmental water current; environmental wind; large amplitude oscillatory motion; mooring system; numerical simulation; optimization; oscillatory motions; time domain analysis; vortices shedding; Bridges; Equations; Grounding; Mathematical model; Rivers; Trajectory; Wind speed; VIM; caisson; current; mooring; numerical simulation; suspension bridge; vortex induced motions; wind;
Conference_Titel :
Electric Technology and Civil Engineering (ICETCE), 2011 International Conference on
Conference_Location :
Lushan
Print_ISBN :
978-1-4577-0289-1
DOI :
10.1109/ICETCE.2011.5776236
