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http://dx.doi.org/10.12989/sem.2013.47.3.331

Sloshing characteristics of an annular cylindrical tuned liquid damper for spar-type floating offshore wind turbine  

Jeon, S.H. (School of Mechanical Engineering, Pusan National University)
Seo, M.W. (School of Mechanical Engineering, Pusan National University)
Cho, Y.U. (School of Mechanical Engineering, Pusan National University)
Park, W.G. (School of Mechanical Engineering, Pusan National University)
Jeong, W.B. (School of Mechanical Engineering, Pusan National University)
Publication Information
Structural Engineering and Mechanics / v.47, no.3, 2013 , pp. 331-343 More about this Journal
Abstract
The natural sloshing frequencies of annular cylindrical TLD are parametrically investigated by experiment, aiming at the exploration of its successful use for suppressing the structural vibration of spar-type floating wind turbine subject to multidirectional wind, wave and current excitations. Five prototypes of annular cylindrical TLD are defined according to the inner and outer radii of acryl container, and eight different liquid fill heights are experimented for each TLD prototype. The apparent masses near the first and second natural sloshing frequencies are parametrically investigated by measuring the apparent mass of interior liquid sloshing to the acceleration excitation. It is observed from the parametric experiments that the first natural sloshing frequency shows the remarkable change with respect to the liquid fill height for each TLD model with different container dimensions. On the other hand, the second natural sloshing frequency is not sensitive to the liquid fill height but to the gap size, for all the TLD models, convincing that the annular cylindrical sloshing damper can effectively suppress the wave- and wind-induced tilting motion of the spar-type floating wind turbine.
Keywords
annular cylindrical sloshing damper; spar-type floating offshore wind turbine; multi-directional and varying-frequency; tilting motion; natural sloshing frequency; apparent mass;
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Times Cited By KSCI : 2  (Citation Analysis)
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