# 11M 502 Theories of Machines II Unit I Force Analysis

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31 Οκτ 2013 (πριν από 4 χρόνια και 6 μήνες)

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11M 502 Theories of Machines II

Unit I

Force Analysis

Applied and constraint forces

Free body diagrams

Static equilibrium conditions

Two, three &
four members

Static force analysis of simple mechanisms

Dynamic force analysis

Inertia force
and

Inertia torque

D Alembert’s principle

The principle of superposition

Dynamic Analysis in
reciprocating engines

Gas forces

Equivalent masses

Crank shaft torque

Inertia forces in a reciprocating engine considering the weight of
the connecting rod

9 Hours

Unit II

Turning Moment Diagram and Flywheel

Turning Movement Diagram for a Single Cylinder Double acting Steam Engine and Multi Cylinder
Engine. Fluctuation of Energy. Flywheel and Flywheel in Punching Press. Balancing of masses

Basics only

Flywheel in printing and cutting machines

9 Hours

Unit III

Balancing

Single Rotating mass by a Single mass rotating in the Same plane and Two masses rotating in
Different planes. Several masses rotating in the Same plane and Different planes
. Partial Balancing of
Unbalanced primary force in a Reciprocating Engine. Partial balancing of Locomotives. Variation of
Tractive force. Swaying Couples. Hammer Blow. Coupled Locomotives. Primary and Secondary
forces of Multi Cylinder In
-
al and V Engines

Effect of Partial Balancing of Reciprocating Parts of TwoCylinder Locomotives

9 Hours

Unit IV

Vibration

Free Vibration. Natural Frequency of free transverse vibration due to a point load, Uniformly

distributed load acting over a Simply Supported beam and Shaft fixed at both ends carrying a
Uniformly distributed load and a shaft subjected to a number of point loads. Critical speed at a shaft.
Viscous Damping. Damping and Magnification Factor. Randam
vibrations. Resonance migration from
one point to another. Isolation and Transmissibility. Free Torsional Vibrations of a Single, Two and
Three Rotor System. Torsionally Equivalant Shaft.

Logarithmic Decrement and Free torsional vibration of a geared syst
em

9 Hours

Unit V

Mechanism for Control

Governors

Types

Centrifugal governors

Gravity controlled and spring controlled centrifugal
governors

Characteristics

Effect of friction

Controlling force

Other Governor mechanisms.
Gyroscopes

Gyroscop
ic forces and torques

Gyroscopic stabilization

Gyroscopic effects in
Automobiles, ships and airplanes.

Sensitiveness and Hunting of governor

9 Hours

Total: 45 + 15 Hours

Textbooks

1. S. S. Rattan,
Theory of Machines
, Tata McGraw Hill Publishing Compan
y Pvt Ltd., New Delhi,

2011.

2. John J Uichker and Joesph E. Shigley,
Theory of Machines and Mechanism
, Tata McGraw Hill

Publishing Company Pvt Ltd., New Delhi, 2005.

References

1. Ashok G Ambekar,
Mechanism and Machine Theory
, Prentice Hall of India, New

Delhi, 2009.

2. R. L. Norton,
Kinematics and Dynamics of Machinery
, Tata McGraw Hill Publishing Company

Pvt Ltd., New Delhi, 2005.