3.4.7.2.8. Physical properties from 3Dfindit

If the physical properties are set in the CNS classification on the 3Dfindit side, these are also transferred to the CAD system during export.

In 3Dfindit, the attributes of the CNS classification are displayed in the part information [Part information] docking window.

Parts information [Part information]

In NX, the material properties are available at part level under Properties -> Attributes tab,

Exemplary figure of NX 1899

The available methods for the display of mass properties depend on respective NX version.

Example from NX 1899: Analysis > Measure > Selection Filter "Solid Body" > Measure dialog (Object) > click on body

Example from NX 1899 : Analysis->Show Mass Properties->Expand Mass Properties on the Assembly Navigator tab -> Update

The following points show how NX behaves in different scenarios:

Volume
As the volume property cannot be changed in NX, the volume transferred from 3Dfindit (CNSVOLUMEEXACT) is ignored. Instead, the actual volume of the model is always used for all calculations.
Where does the density value come from? (Priority ordered from top to bottom)
1. Calculated from volume (CNSVOLUMEEXACT) and mass (CNSMASSEXACT)
2. Fetched from the material (thus indirectly from CNSMAT)
3. Directly imported from CNSDENSITY
4. CAD default value (Steel)
Where does the value for the mass come from? (Priority sorted top down)
1. If the mass (CNSMASSEXACT) is transferred from PARTsolutions, then it is overtaken with highest priority.
  The density of the model is calculated from the mass. CNSDENSITY and the density information from CNSMAT are ignored.
2. If the material (CNSMAT) is supplied, it is mapped, provided there is an entry in the pyhs_material.dat file of the NX installation.
3. If neither CNSMASSEXACT nor CNSMAT are transferred from 3Dfindit, the density is taken from CNSDENSITY and the mass is then calculated from this value.
4. If no parameters are transferred from 3Dfindit, the density is assigned a default value of 7830.64 kg/m³ by NX.

Setting options for physical properties

The following setting options are available in the configuration file ifugnx.cfg for handling the physical properties of solids during export:

[Categories]
PhysicalPropertiesMode=0/1/2/3

0: Physical properties are not mapped at all. They are either acquired from the material (if provided) or calculated from NX customer defaults.

1: "Assert" mode for the physical properties

Available properties:

CNSMASSEXACT (Mass)
CNSDENSITY (Density)
CNSVOLUMEEXACT (Volume)
CNSCOG (Center of gravity)

Physical properties are "asserted" (mapped to specially provided NX fields). This option will make them appear in various information windows, such as the "Displayed Part Weight" properties dialog. It is also possible to map these properties to assemblies in this manner. Mass, density, volume and center of gravity can be mapped.

Note

The physical properties are only assigned if a) either the mass or b) the density AND the volume are specified. If only the density or the volume are specified, the assignment will fail.

If assignments fail, a corresponding error message is displayed. See below.

2: "Real" physical properties are set
Available properties:
- CNSMASSEXACT
- CNSDENSITY
Physical properties are set at the model level (mapped directly to the actual NX physprops). This method only works with parts. Only density and mass can be assigned this way.
3: Options 1 and 2 are both enabled.

Default value: 1

Possible error messages

If PhysicalPropertiesMode=1 or 3, the following error message is issued if the key parameters are missing:

Die Zuweisung pyhsikalischer Eigenschaften ist aufgrund fehlender Schlüsselparameter 
 fehlgeschlagen.

Entweder die Masse oder sowohl Volumen als auch Dichte müssen für eine erfolgreiche 
 Zuweisung gegeben sein.

Wenn nur die Dichte verfügbar ist, wählen Sie bitte einen anderen Zuweisungsmodus für die 
 physikalischen Eigenschaften (setzen Sie in der Konfigurationsdatei 
 ifugnx.cfg "PhysicalPropertiesMode" auf 2).

	Note
	With "PhysicalPropertiesMode=3", the warning has the importance "Moderate" and is only displayed if the DisplayCreationWarningLevel key has a value of 50 or higher. With "PhysicalPropertiesMode=1" (density not set at all), the warning has the importance "Major" and is displayed by default.

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