Deterministic workflow for order cut loading

You can use the Model and Load Pre-processing solution process to extract important order cut loads from RPM-dependent external data in waterfall of frequency spectra format and use the order cut loads in vibro-acoustic response solutions in the Simcenter Nastran environment.

Before you perform the Model and Load Pre-processing task, a Simulation file must be the work and displayed part.

Step	Summary	Detailed steps
1.	Create the solution process.	In the Simulation Navigator, create a new Model and Load Pre-processing solution process by right-clicking a simulation node→New Solution Process→Model and Load Pre-processing→type a name for the solution process. A node with this name appears in the Simulation Navigator.	Create solution process
2.	Import a result file.	In the Simulation Navigator, right-click the pre-processing solution node and choose Add Load→Input File.Import an external result file that contains RPM-dependent data in waterfall of frequency spectra or waterfall of time format.
3.	Select the data types to be processed.	Click the Refresh icon to populate the data from the imported files to the fields in the data table. After the software populates the data, you can access and change the Target Storage Name. Unique target storage names let you track different loads, for example, in the HDF5-specific Data Set field of the Force from External File dialog box and Data definition in the Scenario Based Data-Visualization Navigator or Editor subpanel.
4.	Visualize imported results.	After the import of the result file, you can generate a plot of the results with a preconfigured post-processing view in the Scenario Based Data-Visualization Navigator and navigate through different types of data including order numbers, structural nodes, DOFs, and so on.	Visualize the input files
5.	Transform time-dependent loads into the frequency domain.	Use the Time to Waterfall of Time (when the signal is not split) or Time Signal Processing command to convert input loading from the time to frequency domain and limit the number of results files when you specify lower and upper samples. Note: If the input loading is already in the frequency domain, proceed to the next step.	Transforming time-domain to frequency
6.	Extract order cut loads.	Use the Waterfall of Frequency to Order Cut command to extract orders from a waterfall of frequency spectra.	Waterfall of Frequency to Order Cut dialog box
7.	(Optional) Validate the setup.	Use the Validate command to validate the setup of the solution process. Validation results are displayed in the Information window.
8.	Solve the solution process.	Use the Solve command to solve the solution process and save the results in HDF5 binary format.	Solving the solution process
9.	Visualize the preprocessed results.	Use a preconfigured post-processing view to generate a contour plot or XY plot of the pre-solver results.	Create and edit post-processing scenarios
10.	Extract nodal forces and apply to nodes.	For the Simcenter Nastran solver, extract the forces stored in the HDF5 result file and apply them to target nodes by using:The Create Load Recipe from Results command.You use this command instead of, for example, the Force from External File command, when the HDF5 file contains multiple load cases, because in a solution the software can easily create subcases for these load cases from such load recipe.Note: When you attach the load recipe to an active solution or update a solution from the load recipe, make sure to choose the load condition type File Reference.The Force from External File command. You enter the path to the HDF5 result file, choose the Subcase, and infer the Data Set with the Infer Data Set button.	Create a load recipe from solution process resultsForce or moment loads from an external file

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Extracting order cut data

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Deterministic workflow for order cut loading, Simcenter 3D 2021.1 Series

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