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Dynamics of MachineryA mechanical vibrating system has mass 8 kg and equivalent spring stiffness 5.4 N/mm. A dashpot exerts a force of 40 N when the mass velocity is 1 m/s. Find (i) critical damping coefficient, (ii) damping factor, (iii) logarithmic decrement, and (iv) ratio of two consecutive amplitudes.20267mDynamics of MachineryA single-degree damped vibrating system has mass 7.5 kg and makes 24 free oscillations in 14 seconds. The amplitude reduces to 0.25 of its initial value after five oscillations. Determine (i) spring stiffness, (ii) logarithmic decrement, and (iii) damping factor (system damping/critical damping).20267mDynamics of MachineryThe ratio of actual damping coefficient to critical damping coefficient is called: (i) Frequency ratio (ii) Damping ratio (iii) Transmissibility ratio (iv) Amplitude ratio.20262mSensors and Actuators A proving ring is used to measure: (i) Velocity (ii) Displacement (iii) Pressure (iv) Force20242m
PreviousThe purpose of balancing reciprocating masses is to: (i) Increase engine temperature (ii) Reduce unbalanced forces and couples (iii) Increase friction (iv) Reduce fuel supply.NextThe ratio of actual damping coefficient to critical damping coefficient is called: (i) Frequency ratio (ii) Damping ratio (iii) Transmissibility ratio (iv) Amplitude ratio.
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