 | Randbedingung an einem Knoten |
 | Boundary Node Condition |
 | Condition de nœud limite |
| Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
|---|---|---|---|---|
| IfcBoundaryNodeCondition | ||||
| 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. |
Describes linearly elastic support conditions or connection conditions.
Applicability:
HISTORY New entity in IFC2x2.
IFC 2x4 change: Attributes LinearStiffnessX/Y/Z renamed to TranslationalStiffnessX/Y/Z.
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 representing infinite stiffness is no longer valid and must not be used.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 | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 2 | TranslationalStiffnessX | IfcTranslationalStiffnessSelect | ? | Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object. | X |
| 3 | TranslationalStiffnessY | IfcTranslationalStiffnessSelect | ? | Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object. | X |
| 4 | TranslationalStiffnessZ | IfcTranslationalStiffnessSelect | ? | Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object. | X |
| 5 | RotationalStiffnessX | IfcRotationalStiffnessSelect | ? | Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object. | X |
| 6 | RotationalStiffnessY | IfcRotationalStiffnessSelect | ? | Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object. | X |
| 7 | RotationalStiffnessZ | IfcRotationalStiffnessSelect | ? | Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object. | X |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| IfcBoundaryCondition | |||||
| 1 | Name | IfcLabel | ? | Optionally defines a name for this boundary condition. | X |
| IfcBoundaryNodeCondition | |||||
| 2 | TranslationalStiffnessX | IfcTranslationalStiffnessSelect | ? | Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object. | X |
| 3 | TranslationalStiffnessY | IfcTranslationalStiffnessSelect | ? | Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object. | X |
| 4 | TranslationalStiffnessZ | IfcTranslationalStiffnessSelect | ? | Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object. | X |
| 5 | RotationalStiffnessX | IfcRotationalStiffnessSelect | ? | Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object. | X |
| 6 | RotationalStiffnessY | IfcRotationalStiffnessSelect | ? | Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object. | X |
| 7 | RotationalStiffnessZ | IfcRotationalStiffnessSelect | ? | Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object. | X |
<xs:element name="IfcBoundaryNodeCondition" type="ifc:IfcBoundaryNodeCondition" substitutionGroup="ifc:IfcBoundaryCondition" nillable="true"/>
<xs:complexType name="IfcBoundaryNodeCondition">
<xs:complexContent>
<xs:extension base="ifc:IfcBoundaryCondition">
<xs:sequence>
<xs:element name="TranslationalStiffnessX" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcTranslationalStiffnessSelect"/>
</xs:complexType>
</xs:element>
<xs:element name="TranslationalStiffnessY" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcTranslationalStiffnessSelect"/>
</xs:complexType>
</xs:element>
<xs:element name="TranslationalStiffnessZ" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcTranslationalStiffnessSelect"/>
</xs:complexType>
</xs:element>
<xs:element name="RotationalStiffnessX" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcRotationalStiffnessSelect"/>
</xs:complexType>
</xs:element>
<xs:element name="RotationalStiffnessY" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcRotationalStiffnessSelect"/>
</xs:complexType>
</xs:element>
<xs:element name="RotationalStiffnessZ" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcRotationalStiffnessSelect"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcBoundaryNodeCondition
SUPERTYPE OF(IfcBoundaryNodeConditionWarping)
SUBTYPE OF (IfcBoundaryCondition);
TranslationalStiffnessX : OPTIONAL IfcTranslationalStiffnessSelect;
TranslationalStiffnessY : OPTIONAL IfcTranslationalStiffnessSelect;
TranslationalStiffnessZ : OPTIONAL IfcTranslationalStiffnessSelect;
RotationalStiffnessX : OPTIONAL IfcRotationalStiffnessSelect;
RotationalStiffnessY : OPTIONAL IfcRotationalStiffnessSelect;
RotationalStiffnessZ : OPTIONAL IfcRotationalStiffnessSelect;
END_ENTITY;
EXPRESS-G diagram
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