Release 2025 R2 includes the following analysis enhancements:
Load Vector and Base Excitation Application in MSUP Harmonic Analyses.
You can now specify the following loading conditions in a Modal Analysis:
Acceleration and Acceleration defined as a Base Excitation
Displacement defined as a Base Excitation
These loads do not affect natural frequencies or mode shapes. However, you can use the base excitation and load vector data from these boundary conditions and apply and scale them using the new Load Application object to a downstream Mode Superposition (MSUP) Harmonic analysis.
This new loading condition, Load Application, enables you to take base excitations or load vectors created by an upstream Modal analysis or imported from an Imported Condensed Part object and apply and scale them in a Mode Superposition (MSUP) Harmonic analysis.
Also note that previously, for MSUP Harmonic systems, Imported Condensed Part load vectors were applied during the Use pass with a scale factor of one (1.0) by default. Now, instead of automatic application of load vectors, you apply and scale these load vectors using the Load Application object during the Use pass.
Additional Property Support for Modal Analyses. The following properties are now included in a Modal analysis:
Include Residual Vector: Available in the Options category of the Analysis Settings object. Property options include Yes and No (default). When set to Yes, the application calculates residual vectors for the Modal analysis. You can use these generated residual vectors in a downstream Harmonic Response MSUP analysis when that analysis also has the Include Residual Vector property set to Yes.
Load Control: Available in the Pre-Stress object if you also have an upstream Static Structural analysis specified for the Modal system. You use this property to define load generation for prestressed analyses.
Random Vibration. The Random Vibration analysis now supports a new loading condition: PSD Pressure. This load provides pressure in terms of spectral value vs. frequency based on your choice of the pressures that were applied in the prerequisite modal analysis.
Campbell Diagram Support. You can now create a Campbell Diagram from a prestressed Modal analysis that includes a Bearing that is defined using the Tabular Data function that is dependent on the specified Rotational Velocity.
Solution Interrupt. The Progress Pane Interrupt option is now supported during Coupled Field Static and Coupled Field Transient analyses.
Analyses Selection. The Analyses Selection feature now enables you to activate or deactivate Point Mass and Distributed Mass objects for each analysis in your simulation.
Analysis Settings > Output Controls. The Output Selection property of the Output Controls category of the Analysis Settings object has two new options:
On Mode File By Named Selection. For displacement results (only), during Modal and Harmonic Response analysis that have on demand expansion active, this option enables you to filter the content of the mode file and only write the results for the nodes of the selected named selections.
Follow Upstream Analysis: This setting is available when you have a Harmonic Response or Transient Structural analysis linked to an upstream Modal analysis. The application defaults to this setting and automatically uses the Output Controls settings defined in the upstream Modal analysis when your upstream Modal analysis has the On Demand Expansion Option property set to Yes.
The Motion Load add-on for an RBD analysis now allows you to export the initial assembly configuration to a Static Structural subsystem and choose multiple transient time steps from which to read the loads.