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Step 2: Modify and read input file

Modify Input File

We need to change the number of stiffeners in the x-direction. In the input file, look for the line where the value of NSX is specified. Set NSX=3 as shown below and save the input file.

Read Input File

Create a folder called shell2 at a convenient location. Start ANSYS:

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We see that the symmetry and clamped BC's haven't been applied at the correct locations. The pressure has been applied only over part of the facesheet. We'll fix these mistakes below.

Fix Geometry

Recall that originally we made two copies of subsection ABCD. Now we are making three copies of ABCD. However, the input file still insists on making only two copies; this is inherited from the original case. Let's dig a little further into this mystery and see how we can solve it.

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Save the input file. This will fix the problem with the geometry.

Fix BC's

Recall that, while applying the BC's, we selected the approporiate subset of components and applied the BC's to the selected components using "Pick All" in the pick menu. As above, "Pick All" mangles the selection when we change the number of components. We can again fix this by using "ALL" instead of "Pick All" in the BC commands.

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SFA,ALL,1,PRES,0.05

Save the input file.

Re-read Input File

Main Menu > File > Clear & Start New > OK

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