Force Analysis And Simulation Of Mooring System With Buoys

Mooring system with buoys makes up of buoyancy devices and centenarian line. Buoyancy devices not only pick up the weight of mooring lines, but also improve the dynamic tension. This paper introduces into compatibility equation of buoys and adopts finite difference method to calculate dynamic control equation of mooring line, then makes the preliminary analysis in large software.Under the static analysis of mooring system with buoys, the static force model is founded by classic catenary's theory. And the abrupt junction is analyzed, and then the basic static force equation which contains many buoys is founded without the action of force ocean environment. This equation which has not been found in other papers, is given out to calculate mooring system with buoys easily, and is ready for the dynamical analysis.When dynamical analysis, dynamical control equation of buoy is given out from dynamical control equation of the mooring line and the internal force analysis of buoy. Then the dynamic equation of mooring line and buoy are harmonized. At last numerical method is used and computer code is programmed. The dynamic analysis is made at time domain. The result indicates that the dynamic tension is different at different wave period.Owing to the convenient and compact advantage, this paper simplify modeling analyses to mooring system with buoys model in large finite element software ABAQUS / AQUA, bring up the simplified principle, and summarize the problem when modeling, drawn several key of mooring system with buoys modeling, finally research mooring system with buoys' dynamic response in wave current coupling action, choose airy wave to do time-domain analysis to mooring system with buoys, simulate stress of the mooring line accurately. Result show that buoy can reduce the dynamic tension of mooring line, but bring the larger displacement.