A Direct Time Domain Simulation of Floating Structures With Mooring Lines

2011 ◽  
Author(s):  
Jingpu Chen ◽  
Dexiang Zhu
Keyword(s):  
Time Domain ◽  
Time Domain Method ◽  
Test Results ◽  
Time Domain Simulation ◽  
Mooring Lines ◽  
Restoring Force ◽  
Floating Structures ◽  
Rankine Panel Method ◽  
Domain Method ◽  
Force Characteristics

A direct time domain method is established for analyzing the interactions between the floating structures and mooring lines. The motions of floating structures are solved by a Rankine Panel method in time domain, while the static restoring force characteristics of the mooring system is taken into account. As numerical examples, the motions of two SPARs are solved by this direct time domain method. The numerical results of present method are analyzed and compared with model test results.

Coupled Mooring Analysis for a Deep Water CALM Buoy

2004 ◽  
Author(s):  
J. L. Cozijn ◽  
T. H. J. Bunnik
Keyword(s):  
Model Tests ◽  
Mooring Line ◽  
Mooring System ◽  
Test Results ◽  
Mooring Lines ◽  
Restoring Force ◽  
Small Water ◽  
Force Components ◽  
Force Characteristics ◽  
Line Loads

The effect of the mooring loads on floator motions can be significant for small water plane are floaters like CALM buoys. Not only does the mooring system contribute to the static restoring force components, but the dynamic behaviour of the mooring lines also affects the inertia and damping of the moored CALM buoy. The results from model tests with a moored CALM buoy were compared with the results from two series of time-domain computer simulations. First, fully dynamic coupled simulations were carried out, in which the interaction between the floater motions and the dynamic mooring line loads was modelled for all 6 modes of motion. Second, quasi-static simulations were carried out, in which only the (non-linear) static restoring force characteristics of the mooring system were taken into account. The comparison of results from the simulations and the model tests clearly indicates that the fully dynamic coupled simulations show a much better correspondence with the model test results than the quasi-static simulations. It is concluded that for the simulation of the behavior of a moored CALM buoy in waves a fully dynamic coupled mooring analysis is essential.

A time-domain method for hydroelasticity of very large floating structures in inhomogeneous sea conditions

2018 ◽  
Vol 57 ◽  
pp. 180-192 ◽  
Author(s):  
Wei Wei ◽  
Shixiao Fu ◽  
Torgeir Moan ◽  
Chunhui Song ◽  
Tongxin Ren
Keyword(s):  
Time Domain ◽  
Time Domain Method ◽  
Floating Structures ◽  
Domain Method ◽  
Very Large Floating Structures
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