Modes list definition in UT beam computation

Since the version 2016 of CIVA, it is possible to perform an ultrasonic field computation taking into account several reflections on the boundaries of the specimen. Indeed, the user can define the number of reflections taken into account by CIVA in the computation.

This setting can be accessed from the “Simulation settings” panel under the “Options” tab. By default, only the direct mode will be computed by CIVA. This corresponds to the direct path of the ultrasonic beam.

 

 

By activating the “Specimen’s boundary reflection” option, it becomes possible to define the ultrasonic path to be taken into account in the computation by defining the number of reflections.

 

 

 

It is also possible to check and specify the modes that will be computed by CIVA by selecting the “Specify mode list” option. The list of computed modes now appears in the interface.

 

 

 

Using the right-click on a particular mode of this list, it is possible to remove a mode from the computation.

 

 

The modes list can also be imported from a text file. To do this, the file must contain, on each line, the mode to be taken into account. The nomenclature of the modes is shown in the example below (example with T wave and reflections on the backwall and the surface). There is no special header on this file.

 

 

Then, this modes list can be imported using the “Load” command.