In general, the external structures are the main factors influencing the hydrodynamic performance in the computation simulation, however, the impact of gravity center on the hydrodynamic calculation is ignored. In order to study the effect of gravity center change on the structure hydrodynamic response, a 5MW floating wind power turbine system is taken as the research object. By means of numerical simulation method, the relationship between the height change of gravity center and float spacing, bar form as well as heave plate, respectively is studied. The results show that when the float distance changing, the effect of gravity center height on hydrodynamic performance is mainly reflected in the cross, longitudinal and transverse, longitudinal swing, and when the basic form of larger float distance reaches at the peak response, the gravity center is even lower; the change of diagonal brace is consistent with the rule of motion amplitude along with gravity center changing, and each response amplitude after peak response in terms of numerical value is basically the same; the heave plate adding is able to effectively reduce the pitching and heaving amplitude; for the three floating semi-submersible platform, the best central location is located at the underwater of 3-8m.
CHEN Zhan;MA Yong;ZHANG Liang;WU Minghui
. Impact of the Height of Gravity Center to Hydrodynamic Performance of Floating Structure[J]. Science & Technology Review, 2013
, 31(18)
: 22
-26
.
DOI: 10.3981/j.issn.1000-7857.2013.18.002