INTERACTING STRUCTURES

[kingdsystems]

hi,

Please, I need urgent clarification.

1) How are the structures simulated in tandem or side-by-side as shown in the pictures without one running into the other during the simulation time? This is not my own, but I tried a similar simulation, but as I increased the simulation time during time response analysis, I got an error, and one of the structures ran into the other.

2) How is the articulation for the turret mooring system added as shown in this picture?

I will appreciate it, if someone can make a video of this for me. I am completely lost.

Thanks

[Mike Pettit]

Hello,

Aqwa doesn't automatically detect contact between structures, but you can create Fender connections to model any contact: https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v251/en/wb_aqwa/aqwa_fenders.html

However, I guess the error you're encountering relates to the hydrodynamic interaction between the structures as they move relative to one another in the time domain. In the Hydrodynamic Diffraction analysis the Aqwa solver calculates how much of an effect the presence of one structure has on the motions of the other, and vice versa, due to shielding and wave radiation effects. This interaction effect is only calculated for the structures in their original positions, though, and it is not recalculated in the time domain as the structures move. So, the Aqwa solver stops if it detects that the relative motion is too large, as the results are likely to be inaccurate.

For the articulation (joint) definition, please take a look at the user manual: https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v251/en/wb_aqwa/aqwa_joints.html

Mike