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

Can I set the angle for a DAF applied on an SEA panel?

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 read more
Vibro-Acoustics
14
0

Split a flat FE face

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". read more
Vibro-Acoustics
23
0

I get a Target Cluster Full error - what does it mean?

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 read more
Vibro-Acoustics
6
0

Radiation from ribbed plates

Radiation from ribbed plates
There are here two competing phenomena in the structural-acoustic behavior of bare plates versus ribbed plates: read more
Vibro-Acoustics
23
0

Why would one want to use the Efimtsov model instead of the Cockburn/Robertson model for a TBL source?

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. read more
Vibro-Acoustics
26
0

Can VA One import FE NASTRAN models with superelements defined?

Can VA One import FE NASTRAN models with superelements defined?
VA One can import FE models with superelements (SE) defined... read more
Vibro-Acoustics
25
0

Does VA One SEA use cached data when solving in batch mode?

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. read more
Vibro-Acoustics
11
0

Negative Pin into a BEM fluid

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 read more
Vibro-Acoustics
7
0

MUMPS error when solving my SEA model

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. read more
Vibro-Acoustics
11
0

Why PEM disappears when solving for coupled modes ?

Why PEM disappears when solving for coupled modes ?
PEM subsystems are nodal, whereas acoustic and structural ss are modal. The PEM ss adds to the global dynamic stiffness matrix, just as any SEA etc objects; so the PEM ss is taken into account when solving for the coupled mode. But one won't be able to visualize... read more
Vibro-Acoustics
7
0

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