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Examples oftorsional vibration
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Torsionalvibrationis often a concern in power transmission systems using rotating shafts or couplings where it can cause failures if not controlled.
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This example is from Wikipedia and may be reused under a CC BY-SA license.It is elastic in torsion, allowing it to absorbtorsionalvibration.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Thetorsionalvibrationof the crankshaft forces the fluid through narrow passages that dissipates the vibration as heat.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Also, due to the length of the engine,torsionalvibrationin both crankshaft and camshaft can adversely affect reliability and performance at high speeds.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The long crankshaft tends to exhibittorsionalvibrationmodes under high power, while side-valve flathead engines inhibit smooth intake and exhaust gas flow, limiting power.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The propeller is driven by an integrated gearbox (ratio 1.69:1) withtorsionalvibrationdamper.
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This example is from Wikipedia and may be reused under a CC BY-SA license.However, crankshafttorsionalvibration, present to some degree in all engines, is sufficient to require the use of a harmonic damper at the accessory end of the crankshaft.
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This example is from Wikipedia and may be reused under a CC BY-SA license.In engines with more cylinders, the power strokes overlap, which gives them a smoother delivery of power and lesstorsionalvibrationthan a four can achieve.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The load of a propeller and reduction unit can alter the resonant frequencies of the crankshaft, allowingtorsionalvibrationto increase rapidly to high levels at certain rotational speeds.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The nose of the crankshaft carries atorsionalvibrationdamper, a four-bladed fan, and the pulley for the triangulated thin belt drive for the dynamo and water pump.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The short crankshaft length mitigates thetorsionalvibrationproblem, and secondary balance is better than in an inline 6 because there is no piston pair that move together.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These power pulsations tend to cause increased mechanical noise in transformer and motor laminations due to magnestriction andtorsionalvibrationin generator and motor drive shafts.
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This example is from Wikipedia and may be reused under a CC BY-SA license.They undergo transverse and torsional vibrations as they move.
From theCambridge English Corpus
Torsional vibrations can lead to seat vibrations or noise at certain speeds.
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This example is from Wikipedia and may be reused under a CC BY-SA license.An alternative design is the centrifugal pendulum absorber which is used to reduce the internal combustion engine's torsional vibrations on a few modern cars.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The magnetostrictive transducer is only shown here to demonstrate how longitudinal vibrations may be converted to torsional vibrations and vice versa.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The use of a dual-beam laser is another technique that is used to measure torsional vibrations.
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This example is from Wikipedia and may be reused under a CC BY-SA license.But even a drive train with a very smooth rotational input can develop torsional vibrations through internal components.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Torsional vibrations can greatly reduce crankshaft life, if not cause instantaneous failure, if the crankshaft runs at or through resonance.
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This example is from Wikipedia and may be reused under a CC BY-SA license.A second effect of torsional vibrations applies to passenger cars.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.