Aqwa Wave Wave loads on beam/tube

Hi everyone,

Im trying to add drag loads on tube element of a structure by using Aqwa Wave. The structure has shells (diffraction/radiation pressure calculated by Aqwa Line) and tube connected to the panels.

I mesh my elements (shell181 and PIPE288) with Mechanical APDL and do a ANSTOASAS macro command to export the mesh to Aqwa Wave, then I input an Aqwawave.dat file with tube drag,section ect...

I never manage to plot the results on the tube element...Is it possible or not?How to deal with tube element with Aqwa wave ?

The goal of the study is to plot diffraction/radiation pressure on panels and morsion loads (drag+inertia) on tube and to transfer them to a structural study.
This is basically an hydrodynamic/structural coupled analysis.

I hope i am clear enough !


Jean

 

Transferring the loads to Mechanical FEA using Aqwa Wave is over kill, you ought to be able to plot the pertinent loads directly using either Workbench or AGS, but I'd have to see your setup (not all loads apply to all elements). Alternatively, you can also use AQL (AQWA For Excel) to plot element loads in a workbook.

CWTeebs

 

CWTeebs's suggestion is a good way, you can also transfer the loads into ANSYS and plot
the nodal loads as well as dynamic pressures.

 

Thank you for your answer guys,

I finally succeed in transferring hydrodynamic loads by using Aqwa Wave. My structure contains both pipe and shell elements, I deal with pipe elements with the ASGN command in Aqwa Wave. For each wave load case a file.dat is generated and can be input into Static Structural into WB. This is a coupling method to get both diffracting and morison forces.

 

That's excellent work, I would not have known to do it that way. Keep up the good work and thank you for sharing this interesting approach.

CWTeebs

EDIT:

Another way that could work is to use the module AQWA-FLOW which outputs the pressure, velocity and phase relationship at locations in the fluid domain. It outputs a text file with this data, and, upon editing to a CSV file could be imported using this tutorial:

http://www.edr.se/blogg/blogg/ansys_tutorial_external_data

 

export pressure

Dear CWTeebs
Can you help me about exporting pressure az a text file including nodes coordinate and pressure? I need this text file for ansys classic in order to performing structural analysis.
thanks in advance
sinerely yours
m.qafari

 

a trouble in aqwa wave

Dear jmpape
hi, good work, I have tried alot but I couldn't perform Coupled analysis.
I think I have run Aqwa-Line correctly, but I think Qqwa-Wave run does not leed to generating of file.dat in each load case.

can you give me some advice or explain me what you did?
Also I have analysed a boat in Ansys-Workbench-Aqwa. Can I export pressure as a text file including node numbers?
thank a lot
best regards