IfcBoundaryNodeConditionWarping

Item	Change	Description
IFC2x3 to IFC4
IfcBoundaryNodeConditionWarping
TranslationalStiffnessX	MODIFIED	Name changed from LinearStiffnessX to TranslationalStiffnessX. Type changed from IfcLinearStiffnessMeasure to IfcTranslationalStiffnessSelect.
TranslationalStiffnessY	MODIFIED	Name changed from LinearStiffnessY to TranslationalStiffnessY. Type changed from IfcLinearStiffnessMeasure to IfcTranslationalStiffnessSelect.
TranslationalStiffnessZ	MODIFIED	Name changed from LinearStiffnessZ to TranslationalStiffnessZ. Type changed from IfcLinearStiffnessMeasure to IfcTranslationalStiffnessSelect.
RotationalStiffnessX	MODIFIED	Type changed from IfcRotationalStiffnessMeasure to IfcRotationalStiffnessSelect.
RotationalStiffnessY	MODIFIED	Type changed from IfcRotationalStiffnessMeasure to IfcRotationalStiffnessSelect.
RotationalStiffnessZ	MODIFIED	Type changed from IfcRotationalStiffnessMeasure to IfcRotationalStiffnessSelect.
WarpingStiffness	MODIFIED	Type changed from IfcWarpingMomentMeasure to IfcWarpingStiffnessSelect.

Semantic definitions at the entity

Entity definition

Describes linearly elastic support conditions or connection conditions, including linearly elastic warping restraints.

Applicability:

Point supports and connections.

HISTORY New entity in IFC2x2.

IFC4 CHANGE All attribute data types changed from numeric to SELECT between Boolean and numeric. Stiffnesses may now also be negative, for example to capture destabilizing effects in boundary conditions. The IFC2x3 convention of -1. representing infinite stiffness is no longer valid and must not be used. Infinite stiffness, i.e. fixed supports, are now modeled by the Boolean value TRUE.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
8	WarpingStiffness	IfcWarpingStiffnessSelect	[0:1]	Defines the warping stiffness value.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcBoundaryCondition
1	Name	IfcLabel	[0:1]	Optionally defines a name for this boundary condition.	X
IfcBoundaryNodeCondition
2	TranslationalStiffnessX	IfcTranslationalStiffnessSelect	[0:1]	Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.	X
3	TranslationalStiffnessY	IfcTranslationalStiffnessSelect	[0:1]	Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object.	X
4	TranslationalStiffnessZ	IfcTranslationalStiffnessSelect	[0:1]	Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object.	X
5	RotationalStiffnessX	IfcRotationalStiffnessSelect	[0:1]	Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object.	X
6	RotationalStiffnessY	IfcRotationalStiffnessSelect	[0:1]	Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object.	X
7	RotationalStiffnessZ	IfcRotationalStiffnessSelect	[0:1]	Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object.	X
IfcBoundaryNodeConditionWarping
8	WarpingStiffness	IfcWarpingStiffnessSelect	[0:1]	Defines the warping stiffness value.	X

Formal representations

XSD Specification

 <xs:element name="IfcBoundaryNodeConditionWarping" type="ifc:IfcBoundaryNodeConditionWarping" substitutionGroup="ifc:IfcBoundaryNodeCondition" nillable="true"/>

 <xs:complexType name="IfcBoundaryNodeConditionWarping">

  <xs:complexContent>

   <xs:extension base="ifc:IfcBoundaryNodeCondition">

    <xs:sequence>

     <xs:element name="WarpingStiffness" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:group ref="ifc:IfcWarpingStiffnessSelect"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcBoundaryNodeConditionWarping

 SUBTYPE OF (IfcBoundaryNodeCondition);

  WarpingStiffness : OPTIONAL IfcWarpingStiffnessSelect;

END_ENTITY;

 EXPRESS-G diagram

	Randbedingung an einem Knoten mit Wölbung
	Boundary Node Condition Warping