2_Introduction_2.pptx - 1.2 CHARACTERISTICS OF VIBRATION 1 f T 1 Spring and Mass Vibration Resting State of Equilibrium Spring Mass A 0-A Vibration

2_Introduction_2.pptx - 1.2 CHARACTERISTICS OF VIBRATION 1...

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1.2 CHARACTERISTICS OF VIBRATION 1 T 1 f
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Spring and Mass Vibration -A +A 0 Mass Spring Resting State of Equilibrium
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Vibration
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Vibration – Higher Frequency
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Vibration – Low Amplitude
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Vibration – Greater Amplitude
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Time - ms Fre q ue nc y (Hz) 500 4000 0 1800 Time - ms 0 2 1 Am p litud e 500 Hz 2500 Hz 4000 Hz Frequency Sweep
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Time - ms 0 1800 Time - ms 0 A m p litu d e 5 Pe a k A m p litu d e -R e la tive 1 4 16 4 16 Amplitude Sweep
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Time - ms 0 1575 Time - ms 0 A m p litu d e 10 Sta rtin g Ph a se - d e g re e s 0 180 90 0 180 Phase Sweep
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0 1 2 3 4 5 6 7 8 9 10 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 Time - msec Amplitude - cm Period, Pr, = 4 msec Frequency, f, = 250 Hz; 1000/4 msec = 250 Hz Peak amplitude=1 cm , Peak-to-peak amplitude= 2 cm 0 45 90 135 180 225 270 315 360 -10 -5 0 5 10 Phase - degrees Displacement (mm) Starting Phase=180 degs What is the period (Pr), frequency (f), peak and peak-to-peak amplitude, and starting phase?
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0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 4 4.4 4.8 -8 -6 -4 -2 0 2 4 6 8 Time - msec Amplitude - mm Period, Pr, = 0.8 msec Frequency, f, = 1250 Hz; 1000/0.8 msec = 1250 Hz Peak amplitude=8mm , Peak-to-peak amplitude= 16mm 0 45 90 135 180 225 270 315 360 -10 -5 0 5 10
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  • Fall '16
  • MR BIJU CV
  • Frequency, Mass Vibration

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