Frequency Domain, Modal and AWE

When solving models in the frequency domain and performing a large frequency sweep, it can sometimes be useful to use the study or the (AWE) option in the normal study. Both approaches can significantly speed up the solution time when sweeping over many frequencies.

For the consider:

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The modal solver requires that the eigenfrequencies and modes can be easily found for up to twice the maximal study frequency. If a model contains many resonances in the desired frequency range, this may not be a good idea.

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Note that since the modal solver assumes linear perturbation, all sources should be declared using the linper() operator.

For the consider:

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When using the AWE option under in the study, it is necessary to enter an . This is an expression that represents the response of the system. It needs to be a global expression. This can for example be the sound pressure level (SPL) evaluated using an integration or average operator. Integration in a point will give the SPL in that point.


	Both solvers are used and discussed in the tutorial: Helmholtz Resonator Analyzed with Different Frequency Domain Solvers: Application Library path Acoustics_Module/Tutorials,_Pressure_Acoustics/helmholtz_resonator_solvers


	See also the sections Frequency Domain Study and Frequency Domain, Modal and Time-Dependent, Modal Studies in the Study Types chapter.