Before an analysis can be performed, you must set up your analysis requirements:
1. Select a study for analysis
Before you can perform an analysis on a part, you must first create a study for that part which contains the material information and all the loads and boundary conditions you want to apply to the part.
To select a study from those available for the part you want to analyze:
1. Click FEA and then, in the Analyze group, click Define Job. The Define Job dialog box opens with an active study, if any, automatically available in the Study box.
2. If there is no active study, or if you wish to select a different one, either:
◦ Select it using the Structure Browser,
◦ Type the name of the study in the Study box (include path),
or
◦ Click on one of the LBC symbols (or mesh conditions) on your model that are associated with the required study.
2. Specify the analysis type
1. In the Define Job dialog box, click the Anl Type box.
2. Select the analysis type you want from the expanded list.
Valid options for Anl Type are:
◦ Linear Static. This analysis type requires no options.
◦ P Linear Static. When this is selected, further option fields are displayed to allow you to specify values for:
▪ Error tol: Error tolerance as a percentage.
▪ Min order: The minimum element order.
▪ Max order: The maximum element order.
▪ No Iterations: The number of iterations.
◦ Linear Static H-Adaptive. When this is selected, further option fields are displayed to allow you to specify values for:
▪ Error tol: Error tolerance as a percentage.
▪ No Iterations: The number of iterations.
The Automatic check box specifies whether or not to automatically start the next iteration. When set to off, Creo Elements/Direct Finite Element Analysis lets you start the next iteration manually.
◦ Modal. When this is selected, further option fields are displayed to allow you to specify which natural frequency modes you want to analyze. To specify which modes you want analyzed:
1. Click the Mode Contr (mode control) input box.
2. Select the mode range you want from the expanded list. The following options are available:
▪ Lowest modes. Only a specified number of the lowest frequency modes are analyzed.
▪ Enter the number of modes to analyze in the Num. Modes input field.
▪ Lowest modes in range. Only a specified number of modes within a specified frequency range are analyzed.
▪ Enter the number of modes to analyze in the Num Modes box .
▪ Enter the lower frequency limit in the Lower Freq box.
▪ Enter the upper frequency limit in the Upper Freq box.
The number of modes possible within the frequency range specified will be dependent on the design of your part. It is possible that there may not be as many modes analyzed as you specify in the Num Modes box.
▪ All modes in range.
▪ Enter the lower frequency limit in the Lower Freq box.
▪ Enter the upper frequency limit in the Upper Freq box.
▪ Lowest modes above value.
▪ Enter the number of modes to analyze in the Num Modes box.
▪ Enter the lower frequency limit value in the Lower Freq box.
◦ P Modal. Similar to Modal with additional fields for error tolerance, minimum, and maximum element order, and the number of iterations.
◦ Lin. Buckling. When this is selected, further sub-option fields are displayed to allow you to specify the ranges of buckling modes and Eigenvalues to be used in the analysis.
To specify which buckling modes you want analyzed:
1. Click the Mode Contr (mode control) box.
2. Select the mode range you want from the expanded list. The following options are available:
▪ Lowest modes. Only a specified number of the lowest buckling modes are analyzed.
▪ Enter the required number of buckling modes in the Num Modes box.
▪ Lowest modes in range. Only a specified number of buckling modes within a specified Eigenvalue range are analyzed.
▪ Enter the required number of buckling modes in the Num Modes box.
▪ Enter the lower Eigenvalue limit in the Lwr Eigenv. box.
▪ Enter the upper Eigenvalue limit in the Upr Eigenv. box.
The number of modes possible within the Eigenvalue range specified will be dependent on the design of your part. It is possible that there may not be as many modes analyzed as you specify in the Num Modes box.
▪ All modes in range.
▪ Enter the lower Eigenvalue limit in the Lwr Eigenv. box.
▪ Enter the upper Eigenvalue limit in the Upr Eigenv. box.
▪ Lowest modes above value.
▪ Enter the required number of buckling modes in the Num Modes box.
▪ Enter the lower Eigenvalue limit in the Lwr Eigenv. box.
◦ Sts Thermal. This analysis type requires no options.
3. Run a pre-check on the analysis
When analyzing a complex part or assembly that may take several minutes, you need to know whether or not your system can handle the analysis. The Precheck button in the Define Job dialog box provides resource estimations prior to running an analysis job. These include:
• Application memory
• Solver memory
• Disk space.
Configuration problems and low resources can be checked to minimize the risk of complex analysis jobs running short of resources before the calculation is completed. The type of data provided depends on the type of analysis.
First, setup the analysis with all necessary options. Before sending the job for analysis, click Precheck. Click the Verbose check box to expand the details to display information on all areas being checked. Otherwise, only resources with potential problems are reported.
4. Select the result types
To select the required result types, click the check boxes under Required Results in the Define Job dialog box.
You can select from the following result types:
• Stress
• Displ (Displacement)
• Strain
• React F (Reaction Forces)
• Applied F (Applied Forces)
• Strain Eng (Strain Energy)
• Temperature
• Flux (Heat Flux)
The buttons for selected options are highlighted.
When the dialog box is initially displayed, Stress and Displ. are selected automatically. By default, these result types are always produced in any analysis.
