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Design Loads are created from FEA subcases. Read more within the context of the HyperX -to- FEM interface here.
'Design Load Case' is the term applied to all load scenarios that will be Analyzed/Sized against in HyperX. When generating loading scenarios directly from FEA results, a Design Load Case is a linear combination of FEM subcases/load steps- similar to a NASTRAN SUBCOM command.
Tip
FEA "Design Load Cases" in HyperX are analogous to HyperSizer Pro "Load Cases", the differences being that Design Load Cases are created directly from FEM subcases and have safety factors directly associated with them (eliminating the need for HyperSizer Pro Load Sets).
The Design Load Case Table in the image below illustrates the properties associated with Design Load Cases.
Design Load Cases can either be created individually using the Design Load Case Form or multiple cases can be created in bulk using an Excel Spreadsheet.
Option #1: Create a Single Design Load Case using the Design Load Form
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Navigate to the Analysis tab of the Ribbon and click 'Design Loads'
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The resulting table outlines all existing Design Load Cases currently in the Project.
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Select 'New Case' to launch the Design Load Case Form.
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Define all of the following for the Design Load Case as a whole:
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Name
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Description
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Type - Static vs. Fatigue for Static FEA subcases, Buckling for Buckling FEA subcases.
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Analysis Temperature - Define the Analysis Temperature (temperature at which material properties should be taken) either by a user-specified value or by selecting 'Subcase' to inherit the subcase temperature from the FEM.
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Initial Temperature - Define the Initial Temperature either by user-specified value, selecting 'Subcase,' or selecting 'Analysis' to inherit the Analysis Temperature (i.e. no thermal gradient).
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Click 'Add' to add a line to the Subcases table.
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Click the hyperlink under 'Subcase' to select a subcase from the list of all possible subcases in the Project.
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Define (for each subcase):
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Limit Factor of Safety
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Ultimate Factor of Safety
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Multiplier (for linear superposition of subcases)
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Repeat steps 4-6 for all subcases desired in the Design Load Case.
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Click 'Apply' to save the Design Load Case.
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Click 'Close' to close the form.
Option #2: Create Many Design Load Cases using an Excel Spreadsheet
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Navigate to the Analysis tab of the Ribbon and click 'Design Loads'
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The resulting table outlines all existing Design Load Cases currently in the Project.
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Select the Blue arrow in the top-right corner to export the existing table to Excel.
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The exported spreadsheet will define the proper format for defining Design Load Cases in Excel.
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Add lines to the spreadsheet for each Design Load Case desired. Be sure to mimic the formatting of previous rows to ensure proper interpretation on import. For Design Load Cases containing multiple subcases, there should be one line per subcase. Just duplicate the Design Case ID from Column A.
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Back in the HyperX Design Loads form, select the Yellow arrow to read the edited spreadsheet back into the software.
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Verify that Design Load Cases added to the spreadsheet are seen in the Design Loads table.
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Click 'Apply' to save new case(s).
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Click 'Close' to exit the Design Loads form.
The properties of each Design Load Case (including Initial and Analysis Temperatures, limit and ultimate safety factors, subcase membership, etc.) can be edited directly from the Design Load Case Table or via Excel spreadsheet.
Option #1: Editing Directly in the Design Load Case Table
The most direct method for editing Design Load Case definitions is via the Design Load Case Table. This table can be launched at any time from the Analysis tab of the Ribbon.
There are several tools within this table to directly edit individual cases or a selection of cases individually or in bulk:
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All Design Load Case properties can be edited by launching the Design Loads Case From for the selected case. This is done via the right-click menu ("Edit..." option shown in the right-click menu in the image above) or by double-clicking the desired case to edit.
Option #2: Using Excel Spreadsheet
Design Load Cases can also be edited in Excel.
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Export a spreadsheet version of the Design Load Case Table.
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Edit the resulting spreadsheet directly in Excel. This spreadsheet is organized to mirror the Design Loads table - one row represents one Design Load Case, and each corresponding property option has its own column.
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Save the edits.
Important
Do not rename this spreadsheet - doing so will disconnect this spreadsheet from the Database.
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Re-import the edited spreadsheet back into HyperX.
All changes made in the spreadsheet will be automatically applied to the Design Loads Table:
Default Design Load Cases are formed during initial FEM Import - where one Design Load Case is generated per subcase/load step available in the FEM. However, specific temperatures, factors, case combinations, etc. that better reflect program-specific analysis techniques may need to be applied. In this case, the most convenient approach is to import Design Load Case definitions directly from an Excel spreadsheet.
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Start by creating Design Load Case definitions in an Excel spreadsheet in the proper format for reading into HyperX. Name and save this spreadsheet in a memorable location.
Tip
It may be helpful to export the default Design Load Cases in spreadsheet format to provide the user with a template to follow when creating this document. See Export Design Load Cases to Excel.
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In HyperX, open the Design Load Case Table from the Model tab of the Ribbon.
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Select the 'Import from Excel' icon.
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Use the file explorer to navigate to and select the spreadsheet generated in step (1).
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Click 'Apply' in the resulting Design Load Case Table.
The Design Load Case table be exported from HyperX directly to an Excel spreadsheet. This is particularly useful for editing Design Case definition and facilitating communication and review opportunities within teams.
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From the Model tab of the Ribbon, open the Design Load Case Table.
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Select the 'Export to Excel' icon.