Tips & Tricks

SEA - Display energy flow for a subsystem in complex models
In a complex SEA model made out of several subsystems, VA One can be used to display the energy flow to a particular subsystem in a couple of steps, this helps to understand how the energy flows to a receiving subsystem in order to define noise control strategies. One of the steps is to isolate the junctions associated to this subsystem, this will also help to understand / verify the connectivity of the model.
Ricardo Alvarez Vibro-Acoustics

SEA - Virtual Transmission Loss
In a complex SEA model made out of several subsystems, using VA One is possible to extract the transmission loss (TL) of one or various subsystems in a single step. Transmission loss of partitions e.g. walls, floor, windows, enclosures have been studied theoretically and experimentally over many years. Partitions are often inhomogeneous, non-uniform, comprise combinations of different materials, have indeterminate boundary conditions and are subject to sound complex fields. Surprisingly the sound transmission behavior of many plane partitions is quite well represented by a simple model which ignores the boundaries. Sound transmission loss can be used to correlate the vibro-acoustic behavior of simple and/or complex systems.
Ricardo Alvarez Vibro-Acoustics

VA One - FE or SEA- How to map trim thickness for sound package representation
Sound control treatments / Trim ,(e.g. headliners,hood liners, dash panel and floor isolators, etc) have complex shapes with variable thickness, sometimes only CAD parts are available. How can I use this data to create noise control treatments (NCT) in FE and/or SEA models with variable thickness?. In this article it is shown how to create a variable thickness noise control treatment with VA One for SEA and/or FE purposes at the same time. A multiple noise control treatment (MNCT) is created for SEA purposes and multiple FE Faces with the mapped/discrete thicknesses are created for FE purposes,
Ricardo Alvarez Vibro-Acoustics

Find dominant path in SEA models
Statistical energy analysis (SEA) computes the flow of vibrational energy between coupled subsystems by applying principle of conservation of energy. Using conservation of energy power balance equations which govern response of a system. Since it is based on energy flow, path analysis is straight forward. In this article it is described how to extract the dominant path in a complex model using SEA and VA One . As a result the subsystems in the dominant path are displayed in the 3d window (All other subsystems are hidden).
Ricardo Alvarez Vibro-Acoustics

How to define frame manually for die compensation
Method to define manually frame used for projection in die compensation in processes where frame can’t be taken automatically from tool kinematics.
Vladimír Cerny Sheet Metal Forming

CFD-VIEW Colormap Options: Static, Dynamic, and Cumulative
The Colormap Settings panel in CFD-VIEW assigns colors to data sets. Identical data values on an object are displayed with the same color if they are using the same colormap display. Three options offer the user the opportunity to select the mode for updating the colormap as the underlying data changes, for example during transient simulations. These options are: Static, Dynamic, and Cumulative
Santosh Kini CFD

How to repair mesh nodes with node projection on arc or line
Guidelines to help to fix some local mesh issues by using new nodes projection tool in PAM-STAMP
Vladimír Cerny Sheet Metal Forming

Auto Empty Folders option in CFD-GEOM
When importing large models into CFD-GEOM, you may notice that certain entities listed in the Model Manager may have a red box around them.
Abraham Meganathan CFD

Adding Baffles to an Unstructured domain in CFD-GEOM
While meshing the geometries of industrial significance like mixing tanks, reactor and heat exchangers, we may encounter baffles which have negligible thickness but significant area to impact the physics of the problem in terms of momentum and heat transfer. These surfaces may be free-standing or connected to other surfaces from the domain.
Abraham Meganathan CFD

Managing Multiple STAGE with Virtual Performance Solution (VPS)
This tip provides some information on the usage of multi stage runs in Virtual Performance Solution (VPS)
Jean-Christophe Allain Virtual Performance