Aqwa Lift operations

Discussion in 'Software' started by jean29800, May 30, 2013.

  1. jean29800
    Joined: May 2013
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: France

    jean29800 New Member

    Hello Everyone,
    I am trying to simulate a lifting operation from the crane of a boat to the sea (or a side by side boat, offloading operation). For that I use Aqwa in WB and I meet some trouble to do it. To get the tension in the crane cable during the lift operation (basically a tension in N depending on Time) i use Hydrodynamic Time Response but I never suceeded to get what I want. I have this error in particular : HYDRODYNAMICALLY INTERACTING STRUCTURES HAVE MOVED TOO FAR FROM ANALYSIS POSITION|MOVEMENT EXCEEDS 75%|STOPPED AT TIME = 2.00

    I know its possible to do it using the old fashioned Aqwa-LINE (or to get the analysis.dat .hyd .res files from a aqwa in WB run) then Aqwa-NAUT, I have no idea how to set different position of the package in time domain, how to set cable between the boat and the package. I basically want to get something like that :

    If you have any ideas or questions !


  2. digijtal
    Joined: Mar 2012
    Posts: 14
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Malta

    digijtal Junior Member

    It seems your structure is not moored and is, thus moving outside of the calculation area. To increase the calculation area you must go in Geometry and increase Water Size X and Water Size Y.
    Hope this helps.
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