Tips & Tricks

Introduce a reflection coefficient on an infinite plane in VA One
How can I introduce a reflection coefficient on an infinite plane in VA One? One workaround is to use the following approximate procedure.
Emna Ben Ali Vibro-Acoustics

I'm trying to override properties for a fuselage section, but it’s hard to get TL to match - can you give advice?
In a pure SEA model, overriding modal density and radiation efficiency (i.e. CLF) normally gives good correlation to a hybrid model. For the resonant path, if the CLF, MIB and DLF are the same, one would expect the same answer. If not, discrepancies may come from the non-resonant path which do not get overridden by the manipulations above.
Emna Ben Ali Vibro-Acoustics

What's the requirement for GLIBC and VA One?
The fundamental requirement for VA1 and any Linux OS is based around the GLIBC version. We require GLIBC 2.12 or better for VA One 2014.5. This includes RHEL6+, Centos 6+
Elisabeth Blanchon Vibro-Acoustics

Reading mass matrix from an op2 file
Is there a way to read a mass matrix from an op2 file?, This is not yet implemented in VA One, but is under consideration
Emna Ben Ali Vibro-Acoustics

Using Nova in batch mode
Can Nova be used in batch mode?, Yes, one can launch NOVA with a specific file
Emna Ben Ali Vibro-Acoustics

Can I use OpenFoam on Linux to solve for non-uniform mean flow in VA One?
Yes, write out the input files for OpenFoam from VA One, solve on Linux, and then import the results into VA One. Note: The Linux version of OpenFoam is available on the OpenFoam website, not on the VA One media.
Ricardo Alvarez Vibro-Acoustics

How do I solve in two different models and glue results back together?
This is an example of how to use the new functionality in VA One 2014.5
Emna Ben Ali Vibro-Acoustics

Difference in radiation efficiency in SEA vs. hybrid models with DAF excitation
I see a difference in radiation efficiency in my SEA vs. hybrid models with DAF excitation - why? The SEA radiation efficiency is the efficiency of the resonant modes. The FE radiation efficiency is the efficiency of the response.
Emna Ben Ali Vibro-Acoustics

Getting negative TI from periodic module
what can be the reason of getting a negative TI from periodic module? Its likely caused by a too coarse mesh
Emilio Mencia De Miguel Vibro-Acoustics

How do I re-scale my node coordinates?
One should be able to copy the nodes (including the node numbers) into Excel or equivalent, re-scale there, and then paste with override back in VA One. Alternatively, one can use the following script, where the scaling factor is set. /* Script to factor coordinated for all nodes. The scaling factor is hard coded in scaling_factor
Ricardo Alvarez Vibro-Acoustics