The Export Data tab lets you generate a complete .gbs file for
all directions and a PDF report as follows:
.export.gbs
.export.pdf
Select the Export Data tab and the following page appears: Figure 1.
The five main functions of this tab include:
Experiment Selection
A table on the Export Data tab lets you select a subset of reviewed data for
creating a bushing. You can export only one bushing at a time.
A bushing is identified by its Application_Type attribute in the
.spd file. All experiments in the Review tab with
the matching Application_Type are populated in the top left table. If the
Application_Type field is left blank, all data in the Review tab is
loaded.
The average of the Dynamic Stiffness fit score and Loss Angle fit score is
displayed in parenthesis. You can use these scores to gauge the quality of
the fit. The Application_Type for an Analyze operation is always blank.
Data in the experiment selection table is preloaded to minimize user
interaction. Cells that have only one value are non-editable. When only one
experiment and one cycle are loaded in the Review tab, all cells are
non-editable.
Activity Table
The Activity Table defines the bushing stiffness and damping options that are active
in the .gbs file. The table opens with default values loaded, which you can
modify.
Note the following:
You can select only a single stiffness and a single damping model for each
direction.
Models are grayed out when they are not valid for a certain direction.
Static Properties
Representation of Static Data
MIT supports three equivalent but alternate representation for static
data:
Spline Data
This is the data obtained from the static testing of the
physical bushing. This data is copied from the input
.spd file.
Conceptual Cubic
This is a cubic polynomial, based on the physical data that
approximates the spline data. For more details, see: View Data.
Constant Stiffness
This value represents a linear fit to the spline data. For more
details, see: View Data.
Static Properties
You can edit static data after selecting the Change Static Properties box.
You can specify the data to be exported by selecting the radio buttons for
any given direction.
Conceptual Cubic
This data is calculated from the static data in the
.spd file.
Note: If no
.spd file is available when the
ANALYZE process is performed, then the conceptual cubic
fields are non-editable and are excluded from the output
.gbs file.
Constant Stiffness and Damping
The default is 0.0 when no experiment or .spd field is available
in a certain direction.
Constant Damping
The default is assumed to be 0.1% of the Constant
Stiffness.
Resetting Parameters
The Reset button lets you revert back any changes to the values of the
static parameters to the original values.
Output Units
You can specify the Units in which you wish to export an output
.gbs file. The MIT supports the following:
Table 1.
Mass
Length
Time
Force
Angle
Kilogram
Millimeter
Second
Newton
Degrees
Gram
Meter
KiloNewton
Radians
Export
The Export option lets you create a .pdf report that is encoded and embedded as part
of a .gbs file. You can extract a .pdf report using the script:
mit_decodeReport.py.
Shortcuts to Extract a PDF File from a GBS File
The mit_decodeReport.py is a Python script that extracts a fit report from
the .gbs file and outputs it as a
.pdf file. To enable quick access to the
mit_decodeReport.py, you can define shortcuts
as follows:
Windows
Go to
<HW_Installation/utility/scripts/plotting/mit/batch/
Right-click mit_decodeReport.py, and then select
Send to>Desktop.
A shortcut appears on your desktop. You can copy or
move the shortcut as needed.
Linux
Use the ln -s command to create a symbolic link to
<HW_Installation/utility/scripts/plotting/mit/batch.
Note that Windows style path names with "\" are
allowed.
Note that a path name with blanks is allowed
provided the path name is enclosed in double quotes
as follows: "C:\test directory\testName".
Specifies a .gbs file,
generated by the MIT, that is to be provided as
input to the script.
-o <output-file-name>
Specifies the name of the output
.pdf file to be generated.
When this argument is not specified, the prefix of
the .pdf is obtained from the prefix of the input
.gbs file.
-h
Provides information about how to use this
utility. Invoking mit_batch without any parameters
also provides help content.
Examples
The following are examples of Export Data usage:
mit_decodeReport.py -i C:/input.gbs
Decode the .gbs file,
C:/input.gbs, and generate a
.pdf file,
C:/input.pdf, in the same directory
where the .gbs file is present.
Blanks in paths are allowed inside of double
quotes: "C:\test directory\testName".
The default .xml file
contains only MIT options. You cannot specify path
names for input and output files in this
file.
PDF with Logo and Copyright Information
You an include logo and copyright information in your .pdf report using
a preference file. The contents of the preference file includes:
# Define the HyperWorks version number
*Id(HyperWorks 2019)
# Define the pathname to logo file
{logo_file = "\"AltairPrimary-50.png\""}
# Define a short copyright message
{crght = "\"\""}
#Include but DO NOT change the lines below
*BeginInterpreter("tcl")
set t [::hw::GetT]
hwi GetSessionHandle sess$t
sess$t SetUserVariable mit_report_logo {logo_file}
sess$t SetUserVariable mit_report_copyright {crght}
sess$t ReleaseHandle
*EndInterpreter()
Steps to Include a Preference File in a .pdf
Create an ASCII file
in a directory. You can name the file as you like,
for example:
mit_pdf_preferences.mvw.
Copy into the ASCII
file the text displayed above.
Specify the full path name for the logo file as a
value for the variable logo_file.
Specify appropriate text to use as a value for the
variable cright.
Save the file.
Set the value of the environment variable
HW_CONFIG_PATH to the preference file name:
