Introduction+to+Vibration-2011

Introduction+to+Vibration-2011 - Introduction to Vibration...

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Unformatted text preview: Introduction to Vibration EML4220 2011 Fall http://www.youtube.com/watch?v=3mclp9QmCGs http://www.youtube.com/watch?v=pz1j-GSSitg&feature=related http://www.youtube.com/watch?v=NOaoZHYsRhk&feature=related http://www.youtube.com/watch?v=TUBuUTTnTRA&feature=related http://www.youtube.com/watch?v=L_K54nEqfSo http://www.youtube.com/watch?v=p7ojZWtGUlg&feature=related http://www.youtube.com/watch?v=_zeFaLuFKz4&feature=related Vibration refers to mechanical oscillations about an equilibrium point. may be periodic such as the motion of a pendulum or of a guitar string or random such as the movement of a tire on a road. What is Vibration ? What is Vibration ? DYNAMICS is the branch of physics concerned with the motion of bodies under the action of forces. VIBRATION can be regarded as a subset of dynamics of vibrating systems. The study of vibration deals with the oscillatory motions of bodies and the forces associated with them. Brief History of Vibration Greek philosopher & mathematician Pythagora (582-507BC): first to study musical sound on a scientific basis. He conducted experiments on a vibrating string by using a simple apparatus called a monochord. He further developed the concept of pitch . Brief History of Vibration Galileo Galilei (1564 1642) Studied pendulum and led to the invention of pendulum clock (1656) published a book, in 1638, describing resonance , frequency , length, tension and density of a vibrating stretched string Robert Hooke (1635 1703) found relation between pitch and frequency of the vibration of a string Brief History of Vibration Joseph Sauveur (1653 1716) coined the word acoustics for the science of sound calculated the frequency of a stretched string Joseph Lagrange (1736 1813) found the analytical solution of the vibrating string and the wave equation Brief History of Vibration...
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Introduction+to+Vibration-2011 - Introduction to Vibration...

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