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1. Input Data |
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ID: |
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Any strings. (Leave it blank if you don't need
whiffletree ID.) |
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This will be used to show each whiffletree ID. |
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Number of Loading Point: |
Whole number only. |
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Enter number of items (lowest level of loading
points). |
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Loading Direction: |
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Select loading direction from X, Y, and Z. |
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Warning Length: |
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Any numbers. |
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Warning message will appear if whiffletree
length (either side) becomes less than specified value. |
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Factors: |
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Any numbers separated by "*". |
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This will be a factor to be multiplied into the
weight when making whiffletree. |
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You can input more than one factor separated by
"*". |
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For example, entering "2" means
output load will be weight x 2. |
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For example, entering "2*1.15"
(literally means 2 times 1.15) means output load will be weight x 2 x 1.15. |
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You can enter as many factors as you want
separated by "*". |
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The above example shows 3 x 1.15 x 1.1 (which
gives you overall factor 3.795). |
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Space: |
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Select space from 3, 4, and 5. |
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This is an initial space of items shown in
whiffletree diagram. |
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Input Dialog: |
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Select either "Up-left" or
"Center". |
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This is a location of Input Dialog box when
making whiffletree. |
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Recommended value is "Up-left". |
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Catia Scale: |
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Any numbers. |
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The value is used to scale the dimensions when
output to Catia. |
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Unit L: |
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Any strings. |
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Specified unit will appear in whiffletree
diagram for length. |
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Unit W: |
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Any strings. |
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Specified unit will appear in whiffletree
diagram for weight. |
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Decimal L: |
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Select one from 0, 1, 2, and 3. |
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This will be a significant digit for length
shown in whiffletree diagram. |
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Decimal W: |
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Select one from 0, 1, 2, and 3. |
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This will be a significant digit for weight
shown in whiffletree diagram. |
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2. Making Whiffletree |
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You will be using the following buttons. |
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1. Enter items, weight, and locations. |
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You need to fill out yellow cells only. |
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ID: |
Must start from 1 and increased by 1. |
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The last ID should be equal to "Number of
Loading Point" in the top input field. |
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Name: |
Enter description of items. |
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Weight: |
Enter weight of items. |
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X, Y, Z: |
Enter location of items. |
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Dimensions same as "Loading
Direction" in the top input field may not be left blank. |
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2. Click "Start/Start over" |
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You will see the first level of whiffletree is
drawn as well as "Load" in the table. |
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3. Click "Whiffletree" or
"Multi-Whiffletree" |
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"Whiffletree" is just to make one
whiffletree connection. |
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"Multi-Whiffletree" is to repeat
"Whiffletree" until all whiffletrees are complete or use cancel it
without clicking "Whiffletree" for each connection. |
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In the dialog box, enter the first ID. In this
example, we will connect ID=2 and ID=3. |
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Then, enter the second ID. |
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Table and Whiffletree Diagram will be updated. |
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You see new ID=8. |
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4. Repeat the same process until all
whiffletrees are connected. |
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5. Once all whiffletrees are connected, you
will be asked if you want to complete the whiffletree. |
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Clicking "Yes" finalize the
whiffletree. |
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If you click "No", then you can do
the same thing later by clicking "Finish/Update". |
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6. You can modify the whiffletree. |
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After completing whiffletree, you can change
the followings: |
Weight |
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X |
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Y |
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Z |
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Factors |
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In this example, we modify the Structure weight
(ID=1) from 250.00 to 300.00. |
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Once you change it, click "Modify". |
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Program automatically asks you if you want to
update the Whiffletree (Click "Yes" is recommended.). |
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Then, Table and Whiffletree Diagram will be
updated. |
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3. Clear and Clear All |
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1. "Clear" means you clear everything
except for initial loading items. |
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First-level items will not be cleared. |
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2. "Clear All" means everything will
be erased. (Confirmation dialog will appear.) |
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Everything (except for top input field) will be
cleared. |
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4. Using ID |
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The "ID" button toggles ID on and off
on the whiffletree diagram. |
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This ID will be used. |
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ID will appear. |
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5. Using Material Function |
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1. Enter material data first. Click
"Data" to go to material data entry page. |
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Data entry page: |
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Entering "D" and "F_max"
will calculate P_max. |
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Entering "Iyy", "c", and
"F_max" will calculate M_max. |
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Choose "x" if the material is
available. |
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Choose "x" if the material is
available. |
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2. Click "Material" and available rod
and beam will be displayed in whiffletree diagram. |
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Material will be chosen for rod and beam from
weakest material to the strongest material. |
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If no "x" mark is chosen for a
particular material in data, the material will not be used and never appear
in the whiffletree diagram. |
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If there is no material that meets strength
requirement, it will be displayed like this: |
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Material will be displayed. |
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3. Check load and bending moment. |
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When "Material" is toggled, you see
"MT" button (usually the button appears as "Data"). |
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"MT" means moment or bending moment
in whiffletree beam. |
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Clicking "MT" will show load and
bending moment in the diagram. |
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Bending moment in the beam. |
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Once clicking "MT" button, the button
becomes back to "Data" button. |
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6. Export to Catia |
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1. Enter Rod |
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Click Rod to change the whiffletree diagram to
edit mode. |
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Rod length appear in reds as well as X (or Y
or Z, depending on the selected loading direction) appear in blue. |
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2. Enter rod length in the very first level. |
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A. Directly enter rod length (without units) in
the diagram. |
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B. Enter rod length so that X dimensions are
the same between the connected rods. (Don't enter X values, see the next
step.) |
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Enter rod length directly in the diagram. |
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8.79 = 618.47 + 20 - 629.68 |
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3. Click "Edit/Update Tree" |
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Diagram will be updated with new X dimensions. |
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4. Repeat it for the 2nd level, 3rd level, and
so on. |
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5. Click "Check" when all rods length
up to the highest level are complete. |
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If everything is good, then, you will see the
following diagram and Catia button will be activated. |
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Otherwise, you will see such a message. Check
the rod length. |
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6. Open "Catia Part" in Catia. |
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7. Click Catia. |
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8. Whiffletree geometry data is created in the
Catia Part by points and lines. |
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