IfcBoundaryNodeCondition

Definition from IAI: The entity IfcBoundaryNodeCondition describes boundary conditions that can be applied to structural point connections, either directly for the connection (e.g. the joint) or for the relation between a structural member and the connection.

The following conventions to the values of the LinearStiffness[X,Y,Z] and RotationalStiffness[X,Y,Z] apply:

value (-1.) represents an infinitive large value – or a fixed connectivity with infinitive stiffness
value zero (0.), represents no stiffness or a free connectivity
any other value represents a finitive stiffness or spring connectivity in that direction or rotation
value NIL ($) represents an unknown connectivity condition

NOTE: Instances of the entity IfcBoundaryNodeCondition are used e.g., to define the boundary condition for instances of IfcStructuralPointConnection or IfcRelConnectsStructuralMember pointing to a structural node connection.

HISTORY: New entity in Release IFC2x Edition 2.

EXPRESS specification:

ENTITY IfcBoundaryNodeCondition

SUPERTYPE OF

(IfcBoundaryNodeConditionWarping)

SUBTYPE OF (

IfcBoundaryCondition);

LinearStiffnessX

OPTIONAL IfcLinearStiffnessMeasure;

LinearStiffnessY

OPTIONAL IfcLinearStiffnessMeasure;

LinearStiffnessZ

OPTIONAL IfcLinearStiffnessMeasure;

RotationalStiffnessX

OPTIONAL IfcRotationalStiffnessMeasure;

RotationalStiffnessY

OPTIONAL IfcRotationalStiffnessMeasure;

RotationalStiffnessZ

OPTIONAL IfcRotationalStiffnessMeasure;

END_ENTITY;

Attribute definitions:

LinearStiffnessX	:	Linear stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.
LinearStiffnessY	:	Linear stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object.
LinearStiffnessZ	:	Linear stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object.
RotationalStiffnessX	:	Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object.
RotationalStiffnessY	:	Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object.
RotationalStiffnessZ	:	Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object.

Inheritance graph

ENTITY IfcBoundaryNodeCondition;

ENTITY IfcBoundaryCondition;

Name

OPTIONAL IfcLabel;

ENTITY IfcBoundaryNodeCondition;

LinearStiffnessX

OPTIONAL IfcLinearStiffnessMeasure;

LinearStiffnessY

OPTIONAL IfcLinearStiffnessMeasure;

LinearStiffnessZ

OPTIONAL IfcLinearStiffnessMeasure;

RotationalStiffnessX

OPTIONAL IfcRotationalStiffnessMeasure;

RotationalStiffnessY

OPTIONAL IfcRotationalStiffnessMeasure;

RotationalStiffnessZ

OPTIONAL IfcRotationalStiffnessMeasure;

END_ENTITY;