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Dynamics of Machinery JNTU | D-M Notes JNTU

Dynamics of Machinery Notes JNTU – D-M Notes JNTU of Total Complete Notes

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UNIT I

PRECESSION : Gyroscopes, effect of precession motion on the stability of moving
vehicles such as motor car, motor cycle, aero planes and ships. Static and dynamic
force analysis of planar mechanisms.

UNIT 2

FRICTION : Inclined plane, friction of screw and nuts, pivot and collar, uniform
pressure, uniform wear, friction circle and friction axis : lubricated surfaces, boundary
friction, film lubrication.

UNIT 3

Clutches: Friction clutches- Single Disc or plate clutch, Multiple Disc Clutch, Cone
Clutch, Centrifugal Clutch.

BRAKES AND DYNAMOMETERS : Simple block brakes, internal expanding brake,
band brake ofvehicle. Dynamometers – absorption and transmission types. General
description and methods of operations.

UNIT 4

TURNING MOMENT DIAGRAM AND FLY WHEELS : Turning moment – Inertia
Torque connecting rod angular velocity and acceleration, crank effort and torque
diagrams – Fluctuation of energy – Fly wheels and their design.

UNIT 5

GOVERNERS : Watt, Porter and Proell governors. Spring loaded governors – Hartnell
and hartung with auxiliary springs. Sensitiveness, isochronism and hunting.

UNIT 6

BALANCING : Balancing of rotating masses Single and multiple – single and different
planes.

UNIT 7

Balancing of Reciprocating Masses: Primary, Secondary, and higher balancing of
reciprocating masses. Analytical and graphical methods. Unbalanced forces and
couples – examination of “V” multi cylinder in line and radial engines for primary and
secondary balancing, locomotive balancing – Hammer blow, Swaying couple, variation
of tractive efforts.

UNIT 8

VIBRATION : Free Vibration of mass attached to vertical spring – oscillation of
pendulums, centers of oscillation and suspension. Transverse loads, vibrations of
beams with concentrated and distributed loads. Dunkerly’s methods, Raleigh’s method.
Whirling of shafts, critical speeds, torsional vibrations, two and three rotor systems.
Simple problems on forced damped vibration Vibration Isolation & Transmissibility.

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