Beam calculation: Max beam only

A new feature called “Max beam only” has been developed in the “Beam computation” module of CIVA UT to reduce the size of the result file and the computation time. Thanks to this option, it is possible to directly obtain the beam in Transmission/Reception at the end of the calculation process, whereas by default, a post-processing is necessary.

This feature is particularly useful for simulations with a large computation zone and/or many modes to consider.

When this option is selected, the results include only the maximum amplitude value and the corresponding time of flight for each point in the computation zone. However, it is no longer possible to post-process the results to modify, for example, the reference signal or the computation options.

The “Max beam only” feature is accessible from the “Simulation settings” menu, in the “Storage options” section (see image below).

 

 

The settings presented above are used to compute the beam image in Transmission/Reception. Two other options are available to compute the field in Transmission and/or in Reception.

The image below presents a comparison between a default beam computation result (on the left) and a result with the setting described above (on the right) for a transducer generating 45° transversal waves in simple block made of steel.

 

 

From the default result (image above on the left), an additional post-processing step must be performed to obtain the beam in Transmission/Reception. In addition to the extra time to complete this step, it would also increase the total size of the result file.

In the case of a phased-array transducer, the “cumulated” and “dynamic” images are available after computation, but post-processing for example to modify delay laws is no longer possible.

The image below illustrates the result that would be obtained with an angular scanning focusing. Dynamics images are calibrated from the shot generating the maximum amplitude.