The aim of this project is to conduct a finite element based structural, modal and harmonic…
The aim of this project is to conduct a finite element based structural, modal and
harmonic response analysis on a truss bridge. The members of the system must be
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The structure supplied to each student has been made from 10 mm solid bar. This
needs to be changed to a more appropriate I-beam cross section. Each student should
select and model two (2) different sections to compare and discuss the effect of each
cross section – remember to use your engineering judgment when writing the
discussion, i.e., the thickest and heaviest member might give you the least deflection
and corresponding frequency response, but are you over-engineering? Use the data in
Figure 1 to select your two different I-beams. Also select a thickness of the deck that
is appropriate – remember you as the engineer needs to justify this. A bridge with a
500 mm deck might not deflect at all, but does this make logical sense?
This means you will need to use SpaceClaim to model two cross sections with an
arbitrary length, say 100 mm, then save this on your local drive, see Figure 2. Then,
using SpaceClaim, extract the beams and mid-surface of the deck, share topology and
move the deck mid-surface so that it aligns with the central axis of the beams. By
selecting all the beams, you can assign different profiles in the Beams section of
SpaceClaim, under the Prepare tab.
You will need to use three analysis systems in ANSYS. The first is a Static
Structural, then drag in a Modal system on the solution cell of the Static Structural,
Finally, drag a Harmonic Response onto the Modal solution cell. Your analysis should
look like Figure 3.
Attachments:
EMS5CAE-Assig….pdf
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