Learning Forum

[issacdktn]

Hi,

I work on a floating structure separated in three parts. These three parts are made of different materials. I run hydrodynamic analysis on Ansys Aqwa and I want to link the hydrodynamic pressure from Ansys Aqwa to a static structural analysis on Ansys Mechanical.

But Ansys Mechanical detects only one part for the mapping of hydrodynamic pressure and can’t map hydrodynamic pressure on the other two parts.

Can you help me to map the hydrodynamic pressure on all the parts of my floating structure?

Thank you.

[Avnish Pandey]

Hi Issac,

Have you checked the below forum discussions?

hydrodynamic pressure

How to apply hydordynamic Forces in ANSYS Structural?

 

[issacdktn]

Hello,

 

Thank you for answering, I checked these discussions but in the first one it says: “If the hydrodynamic model contains many structures, then Direct mapping must be used.” I don’t understand what “Direct mapping” means?

 

Moreover, in the second discussion, we are talking about the ACT Aqwaloadmapping extension and when I open my ACT Start Page, I have this window below:

I can’t find the ACT Aqwaloadmapping extension anywhere, can you help me? How can I find and load the ACT Aqwaloadmapping extension? Is AqwaCosimulation the same thing than Aqwaloadmapping?

 

Thanks in advance.

[Avnish Pandey]

Hi Issac,

The meshes in the Static Structural and Hydrodynamic Diffraction systems are generally not coincident, which necessitates some approach to map the hydrodynamic pressures onto the structural mesh. The Pressure Mapping option can be set to Interpolated or Direct.

Where the direct method is used, hydrodynamic pressure components at the position of each selected node are evaluated directly from the diffracting panel source strengths calculated in the Hydrodynamic Diffraction analysis. If the Hydrodynamic Diffraction analysis contains multiple structures, it is possible to use the direct method to map pressures onto one of those structures in the Static Structural system. The direct method also permits mapping onto the outer surfaces of Solid Bodies. This method avoids the loss of accuracy due to interpolation, but it cannot be used to map loads onto Line Bodies.

Check section 8.1.4.1.4 in the below help documentation for more information.

Importing Hydrodynamic Diffraction Pressures and Loads to Mechanical

For the ACT extension, refer the below manual.

Microsoft Word - Aqwa_HD_loadmapping_beta.docx (ansys.com)