Single Point Constraint Summation

Use this subcase type for reaction force and moment summation.

If you have requested single point constraint output, SPC Summation allows you to do single point constraint (SPC) force and moment summation.

• Type: Two options, Force and Moment are available for single point constraint to calculate the reaction forces and moment, respectively.
  • Force: When the type is Force, this dialog gives you the TOTAL, TX, TY, and TZ SPC force summation for the selected entities.
  • Moment: When the type is Moment, this dialog gives you the MX, MY, and MZ SPC moment summation for the selected entities. Additionally, the Reference Grid Point option becomes available (see next bullet).
• Reference Grid Point: Optionally, specify a node number to serve as the basis of the SPC Moment results (not applicable to the Force option). You cannot select the node graphically. However, you can create a node group and graphically select the desired node to determine the node identification number prior to accessing the SPC Summation dialog.

  When this option is left unchecked, the global Origin is the reference point for moment results.

• Selected Entities: You can select Edges, Vertices, and Faces for which to sum single point constraint forces or moments. Right-click in this box to filter your selection by choosing the types of entities to select using the context menu options. Additional context men commands include the following:
  • Delete: Remove highlighted entities from the list.
  • Clear All: Remove all entities from the list.
  • Face Chain: Enable this option to select all faces that are tangent to the clicked face. The selection continues to propagate until edges with no adjacent tangent face are reached.
• Subcase: This drop-down menu allows you to pick a subcase for which to obtain force summation.
• Display: The Display section includes the following buttons:
  • Contour: To dislpay a contour plot of the SPC Summation results,
  • Animate: To animate a contour plot of the SPC Summation results.
  • Vector: To display a vector plot of the SPC Summation results.