Multiple Flexible Bodies
For now, the plugin is limited to the acoustic radiation of one Adams flexible body. Multiple flexible bodies can be defined within Actran. Several flexible bodies could be used if the analysis is set up by hand. This analysis would contain several BC Mesh and Boundary Conditions. Please refer to the Actran support for further information,
support@fft.be.
In many applications there is a single casing surrounding the entire model. This part will radiate acoustic waves. If there are several flexible bodies contributing to the acoustic sound wave radiation:
■Either an individual radiation simulation can be done for each flexible body and the results are then superimposed
■Or, an acoustic radiation analysis is created manually in Actran using all different flexible bodies within one simulation.
Computational Time
Some suggestions to reduce the computational time of an acoustics analysis:
■Reduce the order of infinite elements to a minimum (for example, 5). Be sure to check that the results are not changing due to this.
■Reduce the size of the acoustic mesh to a minimum
■Output the simulation information at fewer time steps
■Don't create an output map, or only for very few time steps (for example, 100 or higher).
Other computation time reduction methods would require modification of the Actran .edat file and then the Actran analysis would need to be run manually. For example, parallel solving (please note that a parallel license for Actran would be necessary) or changing the time integration solver. For further information about computational time reduction, please contact the FFT support,
support@fft.be .