Mechanical Engineering :: Theory of Machine
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The ratio of the actual damping coefficient to the critical damping coefficient is called damping factor.
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When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to
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In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to
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For high speed engines, the cam follower should move with
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In a coupling rod of a locomotive, each of the four pairs is a __________ pair.
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If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
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In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon
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When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be
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The factor which affects the critical speed of a shaft is
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The partial balancing of reciprocating parts in locomotives produces
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