Object-Related Functions
Object-related functions generally work on a specific Unigraphics object. In order to use a Unigraphics object with one of these spreadsheet functions, you will
need to assign a Unigraphics name attribute to the object.
This section contents are:
MASS3D Functions
MASS3D Keywords
Using Component Names
NOTE: Object-related functions may take string or numeric arguments. String arguments such as "object_name" may be specified by the string in double
quotes, such as "LINE1", or by a cell reference to that string.
UGATTR( "object_name", "attribute_title", attribute_type)
Returns a Unigraphics attribute value given a Unigraphics object name, a user-defined attribute title, and a numeric attribute type. The numeric
attribute type may be:
1 = integer attribute
2 = real attribute
3 = string attribute
4 = reference attribute
If the object name is the string "PART", then the specified work part attribute title and type will be returned.
UGNAMES()
Returns the object name, object type and subtype, and layer of all named geometric objects in the work part. One row of information will be returned
per object.
ALLATTR("object_name")
Returns all the integer, real, and string attribute titles and types associated with a given object. If the object name is the string "PART"; then all
integers, real, and string part attribute titles and types will be returned.
ARCLEN( "object_name", param1, param2, units )
Returns arc length of a curve between two parameter values param1 and param2. This function will work on any curve type, such as arcs, circles, conics,
and lines.
Parameter values are from 0.0 to 1.0. Units' conversion is a number from 1 to 4, where:
1 = INCHES
2 = MILLIMETERS
3 = CENTIMETERS
4 = METERS
If the object is not a curve, you will get the message:
@ARCLEN: Curve object type required.
EVALCRV( "object_name", eval_type, param1, param2, steps)
Returns curve evaluation information for a number of steps along a curve between two parameter values param1 and param2.
Parameter values range from 0.0 to 1.0, and the number of steps can be from 1 to 100. Curve evaluation types are:
Type
# Values
Description
1
3
Point
2
1
Curvature
3
1
Normalized curvature
4
3
Tangent
5
3
Binormal
6
3
Principal Normal
7
1
Torsion
8
3
Derivative
When multiple steps are used between parameter values the first column will contain the evaluated parameter value, and the column(s) to the right will contain the
data value(s), so that the data is in a form acceptable to the graphing functions in the spreadsheet.
As with ARCLEN, this function will work on any curve type and will return an error message if the object is not a curve.
EVALSRF( "object_name", eval_type, umin, umax, numu, vmin, vmax, numv )
For EVALSRF, the object must be a face. The function returns surface evaluation information for a number of steps in u and v between two parameter
values.
Parameter values range from 0.0 to 1.0, number of steps from 1 to 100. Surface evaluation types are:
Type
# Values
Description
1
1
Gaussian curvature
2
1
Mean curvature
3
1
Min radius
4
1
Max radius
When multiple steps are used between parameter values, the output will be in a form compatible with the graphing functions. If just u or v are
changing, you get output in the same form as @EVALCRV. If both u and v are changing you get output compatible with a surface graph.
POINT( "object_name" )
Returns the "defining" xyz position for object in the current cell and the next two columns. For circles, arcs, and elliptical conics, the center of
the circle is returned. For planes and coordinate systems, the object origin is returned.
The function recognizes the following types of Unigraphics objects:
RM_point_type,
RM_gfem_node_type,
RM_mdm_analysis_pt_type,
RM_conic_type
RM_circle_type,
RM_coordinate_system_type,
RM_plane_type
Use of other object types will result in the error message:
@POINT: Unable to process object type.
MASS3D( "object_name", type, units)
Returns mass properties for a named sheet or solid body, or all sheets or solids in a part or assembly component.
Single return values are returned in the cell. Multiple values are returned in sets of 3 columns. When all properties (type=0) are returned, each
property is placed in consecutive rows of the spreadsheet. Multiple values for a property are placed in adjacent columns.
Values for "object_name" are:
"object name string"
name of a single sheet body or solid object
PART
extracts mass properties for all sheets and solids in the part
SOLIDS
extracts mass properties for all solids in the part
SHEETS
extracts mass properties for all sheets in the part
Assembly Component Part Name
extracts mass properties for all sheets and solids in the component
part
Units are:
1
pounds & inches
2
pounds & feet
3
grams & centimeters
4
kilograms & meters
Values for the type field are shown below.
Type
# Values
Description
0
42
All properties
1
1
Area
2
1
Volume
3
1
Mass
4
3
Center of Mass (CofM), WCS
5
3
First Moments, WCS Axes and Origin
6
3
Moments of Inertia with respect to (w.r.t.) WCS Axes and Origin
7
3
Moments of Inertia w.r.t. CofM Origin/WCS Axes
8
1
Spherical Moment of Inertia w.r.t. CofM Origin/ WCS Axes
9
3
Inertia Products w.r.t. WCS Axes and Origin
10
3
Inertia Products w.r.t. CofM Origin/WCS Axes
11
3x3=9
Principal Axes, WCS
12
3
Principal Moments w.r.t. CofM Origin
13
3
Radii Of Gyration w.r.t. WCS Axes and Origin
14
3
Radii Of Gyration w.r.t. CofM
Origin/WCS Axes
15
1
Spherical Radius of Gyration w.r.t. CofM Origin/WCS Axes
16
1
Density
Usage Notes for @MASS3D
@MASS3D is one of the more useful of the spreadsheet built-in functions, and can be used to obtain mass properties information from the part.
The capabilities of the mass properties command have been enhanced to allow you to determine mass properties of an entire part, a component, an assembly, or even a
sub-assembly.
The basic mass properties function has the following form:
MASS3D("object_name", type, units )
where "object_name" is the named object to use in calculations (the type and units fields are discussed on the preceding pages).
The "object_name" can be one of 3 special keywords: PART, SOLIDS, or SHEETS. In addition, "object_name" can also be the name of a component in an assembly.
MASS3D Keywords
Instead of selecting a specific object, you can use a keyword that selects all appropriate data from the part. If you want to have mass properties calculations on
all of the solids in a part, including any solids in assembly components, use either PART or SOLIDS as the object name. In a similar manner, you can perform mass
properties calculations on all sheet bodies in the part by using the keyword, SHEETS.
Using Components of Assemblies
When you are working in an assembly you can use the names of parts in the assembly as the value for the "object_name". For example, consider the following part
structure:
Given the part structure shown above, all of the following formulas would be good examples of valid cell contents:
=@MASS3D("sub_comp.prt", 1, 2 )for a sub assembly
=@MASS3D("sub_comp1.prt", 1, 2 )for a component
=@MASS3D("SUB_COMP1.PRT", 1, 2 )case insensitive for names
Using Components and UG/Manager
For a part named 000007/A in UG/Manager, the proper use of the MASS3D function for this component would be:
=@MASS3D("00007/A",0,1)
Sorry, leider nur in Englisch aber komplett...
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Gruss, Konrad
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