Creo Simulate > Modeling Structure and Thermal Problems > Structural Constraints > Constraints, Loads, and Analysis Types
  
Constraints, Loads, and Analysis Types
Some Creo Simulate analysis types require loads and constraints. To help you determine which of these modeling entities your analysis plan calls for, the following tables provide an overview of the load and constraint requirements for the various analysis types.
FEM Mode Analyses
Analysis Type
Constraint or Boundary Condition
Load
Structure
structural
yes
optional
modal
yes
no
Thermal
thermal
yes
optional
All Other Analyses
Analysis Type
Constraint or Boundary Condition
Load
Structure
static
yesa
optional
modal
yesb
no
buckling
yesc
yes
large deformation static
yesa
optional
prestress static
yesa
yes
prestress modal
yes
no
contact
yesa
optional
dynamic time
yes
yes
dynamic frequency
yes
yes
dynamic random
yes
yes
dynamic shock
yes
yes
fatigue
no
yesd
Thermal
steady-state thermal
yes
optional
transient thermal
yes
optional
a. If your model includes point-to-ground springs, you do not need to specify a constraint. For a linear static analysis, if you use the Inertia Relief option on the Static Analysis Definition dialog box, you do not need to specify constraints.
b. If you plan a constrained modal analysis, you need to add at least one constraint. However, for unconstrained modal analyses with rigid mode search, you need no constraints.
c. Buckling analysis uses the loads and constraints defined for the static analysis you select as a basis for the buckling analysis.
d. Fatigue analysis uses the results from a static analysis as the basis for calculating loading.
Return to About Structure Constraints.