![]() I assume my model is very close to the real life part.īased on my previous work, I’m using 2nd order tetrahedral elements, which gave answers accurate to within 2% of predicted hand calculations in my previous post, Calculating the Vibration Frequency of a Cantilevered Beam.ģ-5) Boundary Conditions, Mesh Density, ad Material Properties My model used average measured dimensions. 1 mm, thicknesses in the forks of the prong only varied by +/. I measured my tuning fork with some vernier calipers, accurate to 0. Material Properties – Is your material correct?.Mesh density – Is the mesh fine enough to give you an accurate answer?.Boundary Conditions – Is the way you’re holding the part in the model the same as the way you’re holding it in real life?.Element types – Did you use elements which will give you an accurate answer?.Geometry – Is your CAD model accurate vs the real part?.When you’re making a model of a part a number of inputs impact your answer. Hardware: Ruler + Vernier Calipers (to measure the tuning fork).Hardware: Microphone/headset microphone (allows you to record audio when you hit tuning fork in real life, I could also have used a cell phone).Software: Audacity (audio analysis/recording, analyzes the frequencies in an audio file).Software: Libreoffice/Excel (spreadsheet, conversion of FEA eignevalues into frequencies). ![]()
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