WITH EFFECT FROM THE ACADEMIC YEAR 2012 - 2013
ME 302
DYNAMICS OF MACHINES
Instruction 4 Periods per week
Duration of University Examination 3 Hours
University Examination 75 Marks
Sessional 25 Marks
UNIT-I
Static and Dynamic: Force analysis of 4-bar and slider crank mechanisms. Study of dynamically equivalent system, Inertia forces on connecting rod. Gyroscope: Gyroscopic couple, gyroscopic effects in vehicles.
UNIT-II
Governors: Classification of governors, Watt, Porter, Hartnell and Hartung governors, Controlling Force, Stability, Isochronism, Sensitivity, Power and Effort of governors.
Flywheels: Functions, Differences between flywheel and governor. Turning moment diagrams, flywheel analysis for I.C. Engines and Presses.
UNIT-III
Forces: Forces on bearings due to rotating shaft carrying several masses in several planes. Determination of balance masses from the forces on the bearings, Shaking forces in single cylinder engine, Partial balancing of reciprocating engine. Balancing of two cylinder locomotive engine. Balancing of multi cylinder in-line engines. Balancing of radial engines by direct and reverse cranks method.
UNIT-IV
Vibrations: Vibrations of Single degree freedom system (axial, transverse and torsional). Equivalent system of combination of springs, stepped shaft, whirling speed of shafts.
Damped vibrations: Types of damping, Vibrations with viscous damping.
Forced vibrations: Vibrations with harmonically applied force with viscous damping. Dynamic magnifier, Resonance, Vibration isolation and Transmissibility.
3 4
UNIT-V
Torsion: Torsional vibrations of two rotor, three rotor and geared systems. Natural frequencies of two degree freedom systems. Modes of vibration. Approximate methods for determining natural frequencies: Dunkerley’s method, Rayleigh’s method and Holzer’s method for multi rotor system.
Suggested Reading:
- 1.S.S. Rattan, "Theory of Machines", Tata McGraw Hill, Tata McGraw Education Pvt. Ltd., New Delhi 2010.
- 2.Thomas Bevan, "The Theory of Machines", CBS Publishers & Distributors, 2004.
- 3.John J. Uicker, Jr., Gordon R. Pennock, Joseph E. Shigley, "Theory of Machines and Mechanisms", Oxford University Press, 2003.
- 4.J.S. Rao and Gupta, "Theory and Practice of Mechanical Vibrations", Prentice Hall, 1984.
- 5.R.L. Norten, “Kinematics and Dynamics of Machinery” Tata McGraw Education Pvt. Ltd., New Delhi 2009.