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Resonance presentation

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Mohamed Aboseria
Mohamed Aboseria

The document discusses the concept of resonance through examples such as bridges and mechanical systems. It explains that resonance occurs when an object vibrates at greater amplitudes due to another source emitting its natural frequency. Specifically, it discusses how the Tacoma Narrows Bridge collapsed in 1940 due to wind-induced oscillations resonating with the structure of the bridge. It also summarizes the collapse of the Nimitz Freeway in 1989, which was caused by an earthquake matching the bridge's resonant frequency. The document provides background on concepts like kinetic energy, potential energy, amplitude, and frequency to explain the physics of resonance.

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Resonance presentation
ts ep onc d C ne rk site a i pe m p u e p le S q c y - re n ha ob M e na s lly pr - r o le P es p ea he R t - R a m hat to - E x W ns - o utio d S l - o En S e - T h -
Resonance presentation
What You need to Know Energy o Kinetic Energy o Potential Energy Amplitude Frequency
Resonance - Resonance is defined as the tendency of an object to oscillate or vibrate at greater amplitudes when another sources emits a frequency of the object - To explain it in clearer terms we take the example of a child on a swing
Mismatched Frequency What happens when the emitted frequency is lower? What happens when its higher?
Resonance presentation
Mismatched Frequency What happens when the emitted frequency is lower? What happens when its higher?
- Mechanical Resonance is a type of resonance that deals with mechanical systems. - A mechanical system is taken to mean a physical object. - Bridges and other large structures are the perfect examples to demonstrate Mechanical resonance.
Nimitz Freeway Collapse - A bridge that was located in San Francisco, California - Collapsed in 1989 - The reason for collapse was an earthquake that struck the city.
Soldiers on Bridge - Great story my teacher always used to bring up in high school. - Now soldiers dont march in step while crossing a bridge
So why did it collapse? One theory is that Another theory is it collapsed due that it collapsed to forced due to self- resonance excitation (aero- elastic flutter)
The problem was with the design of the bridge The bridge was closed from the sides, thus blocking the air from passing through Engineers were able to figure this out and so it was decided that when building bridges, the sides would be kept open
Works Cited Webdev17 (2009, March 2). Tacoma-Narrows Bridge construction & Collapse 1940 4 min. Retrieved December 2, 2012. From: http://www.youtube.com/watch?v=6AlSZT9k1ww GonzoNugent (2006, September 28). Tacoma Narrows Bridge Collapse Gallopin Gertie. Retrieved December 2, 2012From: http://www.youtube.com/watch?v=j-zczJXSxnw Crowell Benjamin (2012). Light and Matter. n.d. n.d.pg 443-456. Retrieved from http://www.lightandmatter.com/lm.pdf. Accessed on December 2, 2012. ( Statistical data concerning Tacoma Narrows and Nimitz freeway was obtained from this source) K. Billah and R. Scanlan (1991). "Resonance, Tacoma Narrows Bridge Failure, and Undergraduate Physic Textbooks" (PDF).American Journal of Physics59(2): 118 124. http://www.ketchum.org/billah/Billah-Scanlan.pdf Retrieved December 2, 2012. (Statistical data concerning Tacoma Narrows was obtained from this source) "Shattering wine glass."University of Salford Manchester. N.p., n.d. Web. 2 Dec. 2012.Retreived from http://www.acoustics.salford.ac.uk/feschools/waves/wine1video.htm
Works Cited "0.jpg."article.wn.com. N.p., n.d. Web. 2 Dec. 2012. <i.ytimg.com/vi/d6V2YAkyEdg/0.jpg>. "Amplitude."math.ubc.ca. N.p., n.d. Web. 2 Dec. 2012. www.math.ubc.ca /~cass/courses/m309-03a/a1/pcheng/Amplitude.jpg. "Frequency."qrg.northwestern.edu. N.p., n.d. Web. 2 Dec. 2012. www.qrg.northwestern.edu/projects/vss/docs/media/Communications/freq uency.gif. "Nimitz_cypress_Structure."returntothe80s.wordpress.com. N.p., n.d. Web. 2 Dec. 2012. www.vias.org/physics/img/nimitz_Cypress_structure.jpg. "Potential-and-kinetic."Petervaldivia. N.p., n.d. Web. 2 Dec. 2012. www.petervaldivia.com/technology/energy/image/potencial-and- kinetic.bmp. "Tacoma Narrows Bridge (1940)."Wikipedia. N.p., n.d. Web. 2 Dec. 2012. <en.wikipedia.org/wiki/File:Image-Tacoma_Narrows_Bridge1.gif>. "mum-girl-swing."oliverhume.com.au. N.p., n.d. Web. 2 Dec. 2012. <www.oliverhume.com.au/assets/mum-girl-swing.jpg>.
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Resonance presentation

  • 2. ts ep onc d C ne rk site a i pe m p u e p le S q c y - re n ha ob M e na s lly pr - r o le P es p ea he R t - R a m hat to - E x W ns - o utio d S l - o En S e - T h -
  • 4. What You need to Know Energy o Kinetic Energy o Potential Energy Amplitude Frequency
  • 5. Resonance - Resonance is defined as the tendency of an object to oscillate or vibrate at greater amplitudes when another sources emits a frequency of the object - To explain it in clearer terms we take the example of a child on a swing
  • 6. Mismatched Frequency What happens when the emitted frequency is lower? What happens when its higher?
  • 8. Mismatched Frequency What happens when the emitted frequency is lower? What happens when its higher?
  • 9. - Mechanical Resonance is a type of resonance that deals with mechanical systems. - A mechanical system is taken to mean a physical object. - Bridges and other large structures are the perfect examples to demonstrate Mechanical resonance.
  • 10. Nimitz Freeway Collapse - A bridge that was located in San Francisco, California - Collapsed in 1989 - The reason for collapse was an earthquake that struck the city.
  • 11. Soldiers on Bridge - Great story my teacher always used to bring up in high school. - Now soldiers dont march in step while crossing a bridge
  • 12. So why did it collapse? One theory is that Another theory is it collapsed due that it collapsed to forced due to self- resonance excitation (aero- elastic flutter)
  • 13. The problem was with the design of the bridge The bridge was closed from the sides, thus blocking the air from passing through Engineers were able to figure this out and so it was decided that when building bridges, the sides would be kept open
  • 14. Works Cited Webdev17 (2009, March 2). Tacoma-Narrows Bridge construction & Collapse 1940 4 min. Retrieved December 2, 2012. From: http://www.youtube.com/watch?v=6AlSZT9k1ww GonzoNugent (2006, September 28). Tacoma Narrows Bridge Collapse Gallopin Gertie. Retrieved December 2, 2012From: http://www.youtube.com/watch?v=j-zczJXSxnw Crowell Benjamin (2012). Light and Matter. n.d. n.d.pg 443-456. Retrieved from http://www.lightandmatter.com/lm.pdf. Accessed on December 2, 2012. ( Statistical data concerning Tacoma Narrows and Nimitz freeway was obtained from this source) K. Billah and R. Scanlan (1991). "Resonance, Tacoma Narrows Bridge Failure, and Undergraduate Physic Textbooks" (PDF).American Journal of Physics59(2): 118 124. http://www.ketchum.org/billah/Billah-Scanlan.pdf Retrieved December 2, 2012. (Statistical data concerning Tacoma Narrows was obtained from this source) "Shattering wine glass."University of Salford Manchester. N.p., n.d. Web. 2 Dec. 2012.Retreived from http://www.acoustics.salford.ac.uk/feschools/waves/wine1video.htm
  • 15. Works Cited "0.jpg."article.wn.com. N.p., n.d. Web. 2 Dec. 2012. <i.ytimg.com/vi/d6V2YAkyEdg/0.jpg>. "Amplitude."math.ubc.ca. N.p., n.d. Web. 2 Dec. 2012. www.math.ubc.ca /~cass/courses/m309-03a/a1/pcheng/Amplitude.jpg. "Frequency."qrg.northwestern.edu. N.p., n.d. Web. 2 Dec. 2012. www.qrg.northwestern.edu/projects/vss/docs/media/Communications/freq uency.gif. "Nimitz_cypress_Structure."returntothe80s.wordpress.com. N.p., n.d. Web. 2 Dec. 2012. www.vias.org/physics/img/nimitz_Cypress_structure.jpg. "Potential-and-kinetic."Petervaldivia. N.p., n.d. Web. 2 Dec. 2012. www.petervaldivia.com/technology/energy/image/potencial-and- kinetic.bmp. "Tacoma Narrows Bridge (1940)."Wikipedia. N.p., n.d. Web. 2 Dec. 2012. <en.wikipedia.org/wiki/File:Image-Tacoma_Narrows_Bridge1.gif>. "mum-girl-swing."oliverhume.com.au. N.p., n.d. Web. 2 Dec. 2012. <www.oliverhume.com.au/assets/mum-girl-swing.jpg>.