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--- doc:user:elements:specials:lagrangianmultiplieredge [2013/07/11 18:08] – joris
+++ doc:user:elements:specials:lagrangianmultiplieredge [2015/01/26 10:25] – joris
@@ Line 1: / Line 1: @@
+<note>TODO: More info required </note>
+===== LagrangianMultiplierEdge[2|3]DElement =====
+Mechanism element controlling an edge from the motion of a point. No axisymmetric correction is implemented. These elements must be associated with a ''[[#Edge monitoring using Lagrange multiplier|FieldApplicator]]'' interaction .
+==== Parameter ====
+^  Code Metafor  ^  Description  ^  Dependency  ^
+| ''STIFFMETHOD'' | Method used to compute the stiffness matrix\\ = ''STIFF_ANALYTIC'' : analytic matrix (default)\\= ''STIFF_NUMERIC''  : numerical matrix             |  -  |
+| ''CONST_POINT_NO'' | Point monitoring the motion of the edge |  -  |
+| ''CONST_DIRECTION'' | Constraint direction (1, 2 or 3) |  -  |
+===== Edge monitoring using Lagrange multiplier =====
+The element must first be created using [[doc:user:geometry:mesh:1D]]. Then, a ''FieldApplicator'' is defined and associated to a [[doc:user:elements:general:def_element_properties|ElementProperties]], either ''[[#lagrangianmultiplieredge_2_3_delement|LagrangianMultiplier2DEdge]]'' or ''[[#lagrangianmultiplieredge_2_3_delement|LagrangianMultiplier3DEdge]]''.
+  app = FieldApplicator(no)
+  app.push(gObject1)
+  app.push(gObject2)
+  ...
+  app.addProperty(prp)        # association of an ElementProperties
+  interactionset.add(app)     # the interaction is added in InteractionSet
+or
+  app = interactionset.add(FieldApplicator(no)) #add returns a reference
+  app.push(gObject1)
+  app.push(gObject2)
+  ...
+  app.addProperty(prp)        # association of an ElementProperties
+where
+| ''no''  | number of the ''Interaction'' (which is to say the ''FieldApplicator'') |
+|''gObject1'', ''gObject2''  | meshed geometric entity where the finite elements are applied |
+| ''prp'' | [[doc:user:elements:general:def_element_properties|Properties]] of the [[#lagrangianmultiplieredge_2_3_delement|Lagrange multipliers]] to generate.|