Quasi static                          


Home Up Introduction Design process Contact

 

 

When a higher accuracy is wanted, a quasi-static analysis can be executed.

Less factors are neglected in the quasi-static analysis than in the static analysis.

In the Quasi-Static design the following equation is solved:

        

 

 

 

Differences with static analysis

bullet

Non-linear stiffness: () from the static analysis does not hold   anymore        

bullet

Time is included now.

bullet

Influence of some added mass and damping included now.

Generally one of following two types executed:

bullet

Time-domain simulation: wave induced semisub forces and responses at wave     and drift frequencies, wind and current are treated as steady,                         however and line dynamics are not taken into account.

bullet

Frequency response method: mooring stiffness curve treated as linear and low frequency dynamic forces calculated as for linear single degree of freedom system.

       

                                                                     

 

 

 

Send mail to m.h.p.bijl@student.tudelft.nl with questions or comments about this web site.
Last modified: 10/16/06