Moment
Use a moment measure to measure either the spring moment, or the moment acting on the structure through the constraints, or the resultant moment acting through an imaginary cut.
When you select
Moment, the
Quantity area of the
Measure Definition dialog box expands displaying the following options:
• Reaction At Constraint
• Resultant—Use this option to compute the resultant of all moments that act through an imaginary cut on the model, such as the surface of a volume region or a bonded interface between components.
• Spring
The following items also appear on the dialog box:
• Component—Select one of the following:
◦ Magnitude
◦ X
◦ Y
◦ Z
For the options
X,
Y, or
Z, select a
coordinate system relative to which you define the measure. If you are defining the moment measure as
Reaction At Constraint or
Resultant you must also select a reference point.
• Spatial Evaluation—The following options appear in this area on the dialog box depending on your choice in the Quantity area of the dialog box:
◦ Constraint—This option appears if you selected
Reaction At Constraint as a quantity. Click
to select a constraint. You also need to select point(s) for this quantity.
◦ Surfaces or
Edges or
Components—These options appear in the
Spatial Evaluation area if you select
Resultant as the quantity. Select one of the three options, click
and select a relevant geometric entity on the model. The selected entity must define an imaginary cut through your model, across which you want to compute the resultant moment. Use surfaces to define imaginary cuts through volumes, and use edges and curves to define cuts through shells.
The following table shows how to use these three options to define an imaginary cut through your model.
Options | Geometric Entities Available for Selection | Direction of the Resultant Measure |
Surfaces | Select a surface, a surface region, or the surface of a volume region. | A purple arrow that indicates the normal to the imaginary cut appears on the selected surface. To flip the direction of the normal, click the surface. |
Edges | Select an edge,an edge of a surface region, or the edge of a volume region. You cannot select datum curves. | A purple arrow that indicates a tangent to one of the two surfaces touching the edge appears on the selected edge of the model. Click the edge to select the other surface normal. |
Components (available only in the assembly mode) | Select two components. You cannot select the same component twice, or select a part of a component that is already selected. | The outward normal of the imaginary cut points from the first component to the second component. In other words, the resultant measure computes the moment acting on the first component, as transmitted by the second component. |
|  Make sure that you do not apply loads or constraints to the boundary of the surface that defines the resultant measure otherwise, the computed values for the measure may not be accurate. |
◦ Point—This option appears in Spatial Evaluation if you select Reaction At Constraint or Resultant, options as the Quantity. Specify a point on the model about which you want to define the moment.
◦ Spring—This option appears if you selected Spring as a quantity. Specify a spring. You can only select a point-point or to ground spring.
• Time/Frequency Eval—This check box appears only if you select
Spring. Select the check box if you want to define a dynamic evaluation method for your measure. The only available method is
At Each Step, which directs
Creo Simulate to calculate the value of the measure at each time or frequency step.
• Valid for Analysis Types—This area on the Measure Definition dialog box, displays a list of valid analysis types for the type of quantity selected.
• Visible at higher assembly level—This option appears when you select Resultant or Spring in the Quantity area. Measures defined at the part level are also computed at the assembly level when you select this option.