By using HyperMesh software, make a beam model similar to the below test model and find (Using Nastran) the mode shapes and resonances of the model.
Make your model with three following modelling methods:
1. Using 1-D BEAM Elements,
2. Using 2-D SHELL Elements, and
3. Using 3-D SOLID Elements.
Compare the mode shapes and resonances of the three modelling methods. Explain the reasons for possible slight discrepancies between different modelling methods.
Note: I suggest you make a table and compare the corresponding resonant frequencies for 1D Beam, 2D SHELL, and 3D SOLID elements modelling methods (Six structural modes for each method are sufficient).
**A maximum 4 pages (including figures) report is sufficient.
**Submit your Homework on Learning Hub (Online) in PDF format, do not submit to reception.
Attention:
The below test results are only for your reading and information. My undergraduate students of Vehicle NVH course have conducted the below tests on the same size beam.
You may compare your own CAE results with the blow test results.
POLYETC LASER VIBROMETER (Notes about the experiment)
1. Beam material: Aluminum (Al), Width (W) = 50mm, Length (L) = 600mm' Thickness (t)
= 10mm.
2. Apparatus for experiment:
Templet of Assignment (you can choose whether to follow this templet. This is not affect your mark).
Abstract
In this section, you need to summaries your introduction, methodology, results and findings. The maximum word limit for this section is 150 words.
Introduction
In this section, you can write some background information about CAE modelling and describe why you do this modelling.
Methodology
In this paragraph, describe how you construct this model.
- For Example, showing the geometry of the beam structure with table and few sentences:
- Describe the material property you define in modelling with table and/or sentences.
- Describe the element you used in this assignment. (Beam, Shell, and 3D Solid)
- Simply describe what you see in the results (Mode shape contour).
Discussion
- discuss the results and your findings out of the results.
- What difference between the model meshed with different element and why.
Conclusion
In this paragraph, conclude all the content, especially discussion in one paragraph.
Attachment:- template.rar