ME8594 DYNAMICS OF MACHINES L T P C 4 0 0 4
OBJECTIVES:
To understand the force-motion relationship in components subjected to external forces and analysis of standard mechanisms. To understand the undesirable effects of unbalances resulting from prescribed motions in mechanism. To understand the effect of Dynamics of undesirable vibrations. To understand the principles in mechanisms used for speed control and stability control.UNIT I FORCE ANALYSIS 12
Dynamic force analysis – Inertia force and Inertia torque– D Alembert’s principle –Dynamic Analysis in reciprocating engines – Gas forces – Inertia effect of connecting rod– Bearing loads – Crank shaft torque – Turning moment diagrams –Fly Wheels – Flywheels of punching presses- Dynamics of Cam- follower mechanism.UNIT II BALANCING 12
Static and dynamic balancing – Balancing of rotating masses – Balancing a single cylinder engine – Balancing of Multi-cylinder inline, V-engines – Partial balancing in engines – Balancing of linkages – Balancing machines-Field balancing of discs and rotors.UNIT III FREE VIBRATION 12
Basic features of vibratory systems – Degrees of freedom – single degree of freedom – Free vibration– Equations of motion – Natural frequency – Types of Damping – Damped vibration– Torsional vibration of shaft – Critical speeds of shafts – Torsional vibration – Two and three rotor torsional systems.UNIT IV FORCED VIBRATION 12
Response of one degree freedom systems to periodic forcing – Harmonic disturbances –
Disturbance caused by unbalance – Support motion –transmissibility – Vibration isolation vibration
measurement.
UNIT V MECHANISM FOR CONTROL 12
Governors – Types – Centrifugal governors – Gravity controlled and spring controlled centrifugal governors – Characteristics – Effect of friction – Controlling force curves. Gyroscopes –Gyroscopic forces and torques – Gyroscopic stabilization – Gyroscopic effects in Automobiles, ships and airplanes.TOTAL : 60 PERIODS
OUTCOMES:
Upon the completion of this course the students will be able toCO1 Calculate static and dynamic forces of mechanisms.
CO2 Calculate the balancing masses and their locations of reciprocating and rotating masses.
CO3 Compute the frequency of free vibration.
CO4 Compute the frequency of forced vibration and damping coefficient.
CO5 Calculate the speed and lift of the governor and estimate the gyroscopic effect on automobiles, ships and airplanes.
TEXT BOOKS:
1. F. B. Sayyad, “Dynamics of Machinery”, McMillan Publishers India Ltd., Tech-Max Educational resources, 2011.2. Rattan, S.S, “Theory of Machines”, 4 th Edition, Tata McGraw-Hill, 2014.
3. Uicker, J.J., Pennock G.R and Shigley, J.E., “Theory of Machines and Mechanisms”, 4 th Edition, Oxford University Press, 2014.
REFERENCES:
1. Cleghorn. W. L, “Mechanisms of Machines”, Oxford University Press, 20142. Ghosh. A and Mallick, A.K., “Theory of Mechanisms and Machines", 3 rd Edition Affiliated East-West Pvt. Ltd., New Delhi, 2006.
3. Khurmi, R.S.,”Theory of Machines”, 14 th Edition, S Chand Publications, 2005.
4. Rao.J.S. and Dukkipati.R.V. "Mechanisms and Machine Theory", Wiley-Eastern Ltd., New Delhi, 1992.
5. Robert L. Norton, "Kinematics and Dynamics of Machinery", Tata McGraw-Hill, 2009.
6. V.Ramamurthi, "Mechanics of Machines", Narosa Publishing House, 2002.
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