How to Apply Loads

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To apply a load, you must have an Analysis Type, existing load, support, or condition object selected in the tree.

expandTo apply a load:

  1. Select the appropriate geometry on the model and do one of the following:

    • Click on the appropriate icon on the toolbar and choose the load.

    OR

    • Click right mouse button, select Insert, and choose the load.

  2. Go to the Details View and type in the appropriate values on any highlighted item, such as direction, magnitude, etc. See the Numeric Values section for more information about using expressions.

expandTo apply a tabular or function load:

  1. Select the appropriate geometry on the model and do one of the following:

    • Click on the appropriate icon on the toolbar and choose the load.

    OR

    • Click right mouse button, select Insert, and choose the load.

  2. Go to the Details View and for loads that vary with temperature (Convections) or time (Load Histories) under Magnitude, click on the flyout field to classify the load as either Tabular (Time) or Function.

    • You can enter tabular data, that is, load versus time in the Tabular Data window.

    • You can type in a function such as "=1000*sin(10*time)" in the Magnitude field. See Mathematical Functions for available mathematical operators, functions, limitations, and unit considerations.

  3. The Timeline window displays the variation of load with time.

  4. Annotations in the Geometry window display the current time in the Timeline window along with the load value at that time.

expandTo import a load history from a library:

  1. Select the appropriate geometry on the model and do one of the following:

    • Click on the appropriate icon on the toolbar and choose the load.

    OR

    • Click right mouse button, select Insert, and choose the load.

  2. Go to the Details View and under Magnitude, click on the flyout field and choose Import....

  3. Choose the desired load history if it is listed, then click OK. If it is not listed, click the Add... button, choose a load history or Browse... to one that is stored, then click OK in both dialog boxes.

expandTo add a load history to Engineering Data:

By default, any load history you create in Simulation will remain in Simulation. To save the load history (table or function) for future use:

  1. Create a load history using the Timeline or Tabular Data windows.

  2. Go to the Details View and under Magnitude, click on the flyout field and choose Add to Engineering Data.

expandTo activate or deactivate a load in a stepped analysis:

  1. Highlight the load within a step in the Timeline or a specific step in the Tabular Data window.

  2. Click the right mouse button and choose Activate/Deactivate at this step!.

    Refer to Activation/Deactivation of Loads Within a Step for further details.

Note

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Keep in mind the following:

  • Tabular and Function loads are only available for static structural, flexible dynamic, steady-state thermal, and transient thermal analyses. Joint Conditions in a rigid dynamic analysis can also have Tabular and Function input.

  • Tables or functions defined in Simulation for a load can be added to Engineering Data using {fly-out}> Add to Engineering Data. This would be useful if you want to export this data to a library for use in other Simulation projects.

  • You can also import tabular or function load histories from an existing library into Simulation by activating the flyout menu in the data input fields.

  • You can use the Simulation Wizard to walk through these steps.

For most loads, the Details View includes settings for you to specify the Scoping Method to either the geometry where the load is to be applied (Geometry Selection) or to a Named Selection. If you want to move a load from one part of a model to another, click the Geometry field, click on the new model location, then click Apply.

Loads that require you to define an associated direction include the Define By Details View control. Setting Define By to Vector allows you to define the direction graphically, based on the selected geometry. Setting Define By to Components allows you to define the direction by specifying the x, y, and z magnitude components of the load.

Note

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If you switch the load direction setting in the Define By field, the data is lost.