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 extract results when running VA One on Linux?

Can I extract results when running VA One on Linux?
Can I extract results when running VA One on Linux?, Yes, here is few options: 1. One way to do this is to execute a QuickScript on Windows, while leaving the va1 file on Linux. Eg. solve on the Linux box, and run a QS script on Windows to extract the results,... read more
Vibro-Acoustics
32
0

How does VA One calculate damping from NCT?

How does VA One calculate damping from NCT?
The equation can be found in reference [1] as Eq. (21), in which • T+U ~ 2T = 0.5*m*|v|^2, where m is the mass per unit area of the SEA panel. • Pdiss = 0.5*Re{z}*|v|^2, where z is the impedance of the base of the trim. In the ratio, the wave magnitude |v|... read more
Vibro-Acoustics
34
0

Defined absorption in VA One FEM/BEM

Defined absorption in VA One FEM/BEM
Can I add user defined absorption in VA One FEM/BEM?, Yes, this application of User Defined Impedances to Surfaces of BEM Fluids and FE Acoustic Cavities is implemented in VA One 2007.5 read more
Vibro-Acoustics
22
0

What is the size of stack space available for a compiled and uncompiled Quick Script?

What is the size of stack space available for a compiled and uncompiled Quick Script?
In VA One 2010 the stack size for uncompiled is 8192 bytes, for compiled is 2048 bytes. In VA One 2010.5 the stack size will be 8192 bytes for both compiled and uncompiled scripts. read more
Vibro-Acoustics
11
0

How do I apply a discrete velocity/acceleration constraint to an FE subsystem?

How do I apply a discrete velocity/acceleration constraint to an FE subsystem?
An acceleration or velocity constraint can be applied to the node of an FE subsystem using the "large mass method". read more
Vibro-Acoustics
16
0

How does licensing of beta versions of VA One work?

How does licensing of beta versions of VA One work?
How does licensing of beta versions of VA One work?, Beta versions of VA one require a license with... read more
Vibro-Acoustics
8
0

How can I get an accurate Radiation Loss Factor to use in my SEA model?

How can I get an accurate Radiation Loss Factor to use in my SEA model?
One can use a hybrid model with an FE subsystem with an FE face connected to a SIF, and calculate the radiation efficiency. From this the radiation loss factor can be calculate read more
Vibro-Acoustics
39
0

New VA One 2014.5 variables

New VA One 2014.5 variables
Which are the new variables introduced in VA One 2014.5? VAONE_USE_PARDISO_SOLVER=1 VAONE_LJ_ANGLE_FIX VAONE_LJ_HERMITIAN_FIX VAONE_REPORT_LJ_ANGLE_FIX read more
Vibro-Acoustics
12
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?
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. However, when passed a .ntf or .xml file VA One SEA solves from scratch each time. read more
Vibro-Acoustics
7
0

Using pinned/simply supported BC in FE to compare to SEA

Using pinned/simply supported BC in FE to compare to SEA
Why do I need to use pinned/simply supported BC in FE to compare to SEA?, Most, if not all, SEA theory is developed using an assumption of simply supported plates ... read more
Vibro-Acoustics
16
0

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