Tips & Tricks

How do I work with only imported geometry for creating temporary nodes for subsystem creation?

In order to import the geometry, and use this for creating new temporary nodes, select to import “Geometry (nodes and elements)”. Then in the visibility tree, uncheck “Imported nodes” under Imported “CAD/FE Geometry”, and make “Nodes on Visible Objects” checked.

Difference in BEM solve times when recovering Radiation Efficiency. Is this expected?

I see a drastic difference in BEM solve times when recovering Rad Eff. Is this expected?, Yes, computing the BEM radiation efficiency is very expensive as it has to recover the velocity at every wetted node and multiply by the mode shape at that mode, then sum that all up.

What is the recommended mesh density for RAYON BEM and FMM BEM?

For standard BEM one can start with 6-8 elements, and refine from there. For collocation (used by the FMM solver) the guideline should be 6 to 10 elements.

Workaround for using VPS 2014 DMP modal data in VA One (internal)

It is possible to export the modes in erfh5 format of type 1. You have for that to setup the following environment variable: PAM_OCTRL_ERFVERSION=1 PSM is much faster than BLOCK_IRAM.

What is the GUI process when creating a manual point junction?

the process in the GUI, when creating a manual point junction is as follows ...

Difference between using an external vs. internal FE solver in VA One

In brief, what’s the difference between using an external vs. internal FE solver in VA One? The background is that VA One is using structural modes for FE and for FE/SEA hybrid. These modes can come from two sources: - Internal VA One Solver - External solver (NASTRAN, ANSYS, ABAQUS etc.)

How to manually set the megawords variable in Rayon?

The megaword variable can be set by specifying the value at the end of the irpoc line in the startrayon.bat file:

Can I set RAYON to solve in batch using a script in VA One?

There is no API call for launching BEM runs ...

How do I run the RAYON solver in Linux?

To solve for intermediate BEM results, set the solve options to write out files from VA One. The log window will contain information about where the files are written, MODEL name, and BEM FLUID names,

Difference in subsystem properties for a mirrored ribbed singly curved shell

Why is there a slight difference in subsystem properties for a mirrored ribbed singly curved shell? The reason is that the normal of the singly curved shell is flipped,