Tips & Tricks

Here you will find articles on how to solve specific issues related to ESI's software solutions. Missing ESI products will be added progressively. Each article has a short abstract which is accessible to everyone. As logged users you can see the full article with all attached screenshots, and you can post comments related to each article.

How can I batch update the connection between an SEA subsystems and a SIF?
This can in most cases be achieved by using the utility "Connect Semi-Infinite Fluid" script available with in VA One.
Emna Ben Ali
Vibro-Acoustics
15

Can I set the angle for a DAF applied on an SEA panel?
The angle can be set for an NCT, so a workaround is to use a "gap" NCT and set the angle for this NCT
Emna Ben Ali
Vibro-Acoustics
14

Split a flat FE face
How can I split a flat FE face?, A way to split a FE face manually is to use the script "General > Create >Create FE Geometry from Selection".
Emna Ben Ali
Vibro-Acoustics
23

I get a Target Cluster Full error - what does it mean?
It is a known issue in 2013 with a large number of frequencies being recovered at a large number of nodes
Emna Ben Ali
Vibro-Acoustics
6

Radiation from ribbed plates
There are here two competing phenomena in the structural-acoustic behavior of bare plates versus ribbed plates:
Emna Ben Ali
Vibro-Acoustics
24

Why would one want to use the Efimtsov model instead of the Cockburn/Robertson model for a TBL source?
From Graham: the main advantage of the Efimtsov versus the Cockburn/Robertson model is that it accounts for the dependence of the decay coefficients (i.e. correlation length) on boundary layer thickness.
Emna Ben Ali
Vibro-Acoustics
26

Can VA One import FE NASTRAN models with superelements defined?
VA One can import FE models with superelements (SE) defined...
Emna Ben Ali
Vibro-Acoustics
28

Does VA One SEA use cached data when solving in batch mode?
Does VA One SEA use cached data when solving in batch mode?, Yes, with a .va1 as input to the batch solve, VA One SEA will use the CLF's cached in that .va1 if they exist.
Emna Ben Ali
Vibro-Acoustics
11

Negative Pin into a BEM fluid
I see negative Pin into a BEM fluid - what may be the reason?,This was a known issue for cases with heavy fluids
Emna Ben Ali
Vibro-Acoustics
10

MUMPS error when solving my SEA model
I'm getting a MUMPS error when solving my SEA model - what may be the cause?, Reason for this is un-allowed or un-physical combination of physical properties in some NCTs. Correct those and the solve should go through.
Emna Ben Ali
Vibro-Acoustics
11