module-vii –calculation of natural frequency vibration engineering
Adventures in Natural Frequency
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Transcript of Adventures in Natural Frequency
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Adventures in Natural Frequency
Gravity Chimes and
Boom Whackers
By Dan Bruton and Walter Trikosko
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What can students learn from these?
• Natural Frequency– Depends on size and elastic
properties of the object
• Concept Connections– Frequency, pitch, wavelength
By Dan Bruton and Walter Trikosko
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Demos and ExamplesNatural Frequency
• Singing Rod• Music Tree• Wine Glass• Organ Pipe
– Open and Closed
• Frog and Cricket
• Nails • Bells• Tuning Forks• Swing• Pendulum• Musical
Instruments• Cephied Variable
StarsBy Dan Bruton and Walter Trikosko
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TREE HOLE FROG TREE HOLE FROG
ofofBORNEOBORNEO
http://www.biol.lu.se/zooekologi/epb/people-en/bl-en/bl-meta-en/bl-meta-en.htm
By Dan Bruton and Walter Trikosko
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By Dan Bruton and Walter Trikosko
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By Dan Bruton and Walter Trikosko
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Boom WhackersConstruction
• Locate color paper and label each with a note• Obtain a long and short fluorescent lamp guard• Cut each to the lengths provided • in the table
C ED F G A B
By Dan Bruton and Walter Trikosko
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THREE TUNESTHREE TUNES
By Dan Bruton and Walter Trikosko
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Notes with hats correspond to a tube with a cap on
the end.
By Dan Bruton and Walter Trikosko
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By Dan Bruton and Walter Trikosko
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By Dan Bruton and Walter Trikosko
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Gravity ChimesConstruction
• Cut aluminum rods to the correct length• Paint each length a different color• Sort the rods according to the order
provided• Method 1: Line rods up on the edge of a
table and flip them off onto the floor.• Method 2: Hand out the rods to the
students in your class and let them drop them in order.By Dan Bruton and Walter Trikosko