Isolation anti-vibratoire

A vibration isolator is a device used to minimize the effects of vibration transmissibility in a building.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 595.

Table 595 — IfcVibrationIsolator Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 596.

Table 596 — IfcVibrationIsolator Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 597.

Table 597 — IfcVibrationIsolator Quantity Sets

Material Constituents

The Material Constituents concept applies to this entity as shown in Table 598.
CasingMaterial from which the casing is constructed.
DampingMaterial from which the damping element of the vibration isolator is constructed.

Table 598 — IfcVibrationIsolator Material Constituents

XSD Specification:

 <xs:element name="IfcVibrationIsolator" type="ifc:IfcVibrationIsolator" substitutionGroup="ifc:IfcElementComponent" nillable="true"/>
 <xs:complexType name="IfcVibrationIsolator">
   <xs:extension base="ifc:IfcElementComponent">
    <xs:attribute name="PredefinedType" type="ifc:IfcVibrationIsolatorTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcVibrationIsolator
SUBTYPE OF IfcElementComponent;
PredefinedType : OPTIONAL IfcVibrationIsolatorTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcVibrationIsolatorTypeEnum.USERDEFINED) OR ((PredefinedType = IfcVibrationIsolatorTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCVIBRATIONISOLATORTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcVibrationIsolatorType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no vibration isolator type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcVibrationIsolatorType.

Inheritance Graph:

ENTITY IfcVibrationIsolator
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcElementComponent
ENTITY IfcVibrationIsolator
PredefinedType : OPTIONAL IfcVibrationIsolatorTypeEnum;

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