Users:Geometry Generation/Design Supports

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{| border="1" cellpadding="3" cellspacing="0"
 
{| border="1" cellpadding="3" cellspacing="0"
|colspan="3" style="background:#efefef;"| Parameters
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|colspan="3" style="background:#efefef;"| Parameters LOC_COORD
 
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!Parameter
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!Parameter
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!Description
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!Defined for
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|-
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!u,v,w = ''int''{0;1}
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|only valid for = 0 or = 1. 0 denotes the beginning of the knot vector and 1 the end. If nothing is defined, the boundary conditions are applied to the whole patch.
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|Designelements with respective dimensions.
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|-
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!DE-BREP ''int''
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|applies the boundary conditions to the BRepElement.
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|DesignBRepelement.
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|-
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|colspan="3" style="background:#efefef;"| Parameters BC
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!Parameter  
 
!Description
 
!Description
 
!Defined for
 
!Defined for
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|colspan="3" style="background:#efefef;"| Parameters CURVE
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!Parameter CURVE
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!Description
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!Defined for
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|-
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!CURVE = ''int''
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|initial displacements are scaled by the global load factor * local load factor of the defined load curve.
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|DISP_X_NONZERO, DISP_Y_NONZERO, DISP_Z_NONZERO, DISP_X_NONZERO <br /> CLAMPED_TOR_NONZERO <br /> CLAMPED_X_NONZERO, CLAMPED_Y_NONZERO, CLAMPED_Z_NONZERO
 
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DE-SUP  1  1      u=0          CLAMPED_TOR   
 
DE-SUP  1  1      u=0          CLAMPED_TOR   
 
DE-SUP  1  1      u=0          DISP_X_NONZERO = 0.25 , DISP_Y_NONZERO, DISP_Z_NONZERO CURVE = 2                      ! CURVE = int works only for nonzero displacements
 
DE-SUP  1  1      u=0          DISP_X_NONZERO = 0.25 , DISP_Y_NONZERO, DISP_Z_NONZERO CURVE = 2                      ! CURVE = int works only for nonzero displacements
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</pre>
  
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<!--
 
!Further boundary types. Not necessarily defined for element type
 
!Further boundary types. Not necessarily defined for element type
 
!DISP_X_COUPLING, DISP_Y_COUPLING, DISP_Z_COUPLING
 
!DISP_X_COUPLING, DISP_Y_COUPLING, DISP_Z_COUPLING
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!ROT_T1, ROT_T2, ROT_T3
 
!ROT_T1, ROT_T2, ROT_T3
 
!DIR_DIFF_SHELL8_X, DIR_DIFF_SHELL8_Y, DIR_DIFF_SHELL8_Z
 
!DIR_DIFF_SHELL8_X, DIR_DIFF_SHELL8_Y, DIR_DIFF_SHELL8_Z
</pre>
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-->

Revision as of 11:07, 23 January 2017

Solution space is determined by the refinement. If a NURBS patch is the underlying geometry of the respective Design / Design BRep element, the polynomial degree (p,q,r) and the knot vector can be manipulated for every direction in the parameter space (u,v,w).

Parameter Description

Parameters LOC_COORD
Parameter Description Defined for
u,v,w = int{0;1} only valid for = 0 or = 1. 0 denotes the beginning of the knot vector and 1 the end. If nothing is defined, the boundary conditions are applied to the whole patch. Designelements with respective dimensions.
DE-BREP int applies the boundary conditions to the BRepElement. DesignBRepelement.
Parameters BC
Parameter Description Defined for
DISP_X
DISP_Y
DISP_Z
DISP_ALL
blocks the displacement of the corresponding nodes in the respective directions every element with respective degrees of freedom at the nodes
DISP_X_NONZERO
DISP_Y_NONZERO
DISP_Z_NONZERO
blocks the displacement of the corresponding nodes in the respective directions every element with respective degrees of freedom at the nodes
DISP_T1
DISP_T2
DISP_T3
blocks the displacement in the respective directions. Is applied weakly and summoned over all gauss points. Directions correspond to the base vectors of the element formulation. ElementNURBS_BRep_EdgeCoupling with ElementSurface_NURBS
CLAMPED clampes by blocking the displacements of the first two control points. It is only applicable for open knot vectors. every NURBS based element
CLAMPED_X
CLAMPED_Y
CLAMPED_Z
clampes by blocking the displacements in the defined directions of the first two control points. Note that, X, Y, Z does not denote the rotation axis. every NURBS based element
CLAMPED_TOR blocks the rotational dof rot_tan. ElementBeam_3D_NURBS_KLRod,ElementNURBS_BRep_Beam
CLAMPED_TOR_NONZERO sets the rotational dof rot_tan to defined value ( by value or NURBS_REF). ElementBeam_3D_NURBS_KLRod
ROT_X
ROT_Y
ROT_Z
ROT_ALL
blocks the rotation of the corresponding nodes around the respective axis. every element with respective degrees of freedom at the nodes
ROT_T1
ROT_T2
ROT_T3
blocks the rotation around the respective base vectors of the element formulation. Is applied weakly and summoned over all gauss points. ElementNURBS_BRep_EdgeCoupling with ElementSurface_NURBS
DIR_DIFF_SHELL8_X
DIR_DIFF_SHELL8_Y
DIR_DIFF_SHELL8_Z
Parameters CURVE
Parameter CURVE Description Defined for
CURVE = int initial displacements are scaled by the global load factor * local load factor of the defined load curve. DISP_X_NONZERO, DISP_Y_NONZERO, DISP_Z_NONZERO, DISP_X_NONZERO
CLAMPED_TOR_NONZERO
CLAMPED_X_NONZERO, CLAMPED_Y_NONZERO, CLAMPED_Z_NONZERO

Example of a Complete Input Block

!===================================================================
!        ID  DE-EL     LOC COORD  BC
! u, v, w restricted to 0 & 1 = start and end of patch = first / last row of control points -> strong coupling
! DE-BREP -> weak coupling on DesignBoundary 
DE-SUP   1   1       u=0          DISP_X, DISP_Y, DISP_Z
DE-SUP   1   1       u=0 v=1 w=1  DISP_X, DISP_Y, DISP_Z
DE-SUP   1   1                    DISP_X, DISP_Y, DISP_Z                                                                ! if no position is provided, bcs are applied to whole patch (every control point)
DE-SUP   1   1       DE-BREP 1    DISP_X, DISP_Y, DISP_Z
DE-SUP   1   1       DE-BREP 1    DISP_T1, DISP_T2, DISP_T3
DE-SUP   1   1       u=0          CLAMPED
DE-SUP   1   1       u=0          CLAMPED_TOR  
DE-SUP   1   1       u=0          DISP_X_NONZERO = 0.25 , DISP_Y_NONZERO, DISP_Z_NONZERO CURVE = 2                      ! CURVE = int works only for nonzero displacements






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