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Boundary conditions represent the experimental conditions on the structure to be calculated. If these conditions are incorrectly defined, the calculation may fail (e.g. if no blocking is imposed, the static analysis might fail as a result of a rigid body displacement).
Boundary conditions are automatically put into the "BOUNDARY
CONDITIONS SET" at the time they are created, and are accessible
at any time in the symbolic tree .
There are two types of boundary conditions, organised according to the type of analysis allowed.
Mechanical boundary conditions
Fixed
supports in relation to a register mark, or according
to a normal or tangential direction
Elastic
supports in relation to a register mark, or according
to a normal or tangential direction
Imposed
displacements in relation to a register mark, or according
to a normal or tangential direction
Slackening of
degrees of freedom on beam ends
Thermal boundary conditions
Specific conditions are used for thermal analyses. The list comprises:
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