PE302: DYNAMICS OF MACHINES

CREDITS = 5 (L=3, T=0, P=2)

Teaching and Assessment Scheme:

Teaching Scheme

Teaching Scheme

Credits Marks Distribution

Total Marks L T P C

Theory Marks Practical Marks

ESE CE ESE CE

3 0 2 5 70 30 30 20 150

Course Content:

Sr.

No. Topics

Teaching

Hours

1 Dynamic Force analysis of mechanisms:

Introduction, D’alembert’s Principle, Equivalent Offset Inertia Force,

Dynamic Analysis of Four Link Mechanism (only Graphical Method),

Dynamically Equivalent System, Dynamic Analysis of Slider Crank

Mechanism, Velocity & Acceleration of Piston & Angular Velocity &

Angular Acceleration of Connecting Rod, Engine Force Analysis, Turning

Moment on Crank Shaft, Inertia Force in Reciprocating Engines Graphical

Method (Klein’s Construction) considering Mass of Connecting Rod,

Inertia of Connecting Rod & Correction Couple

Flywheel Design & Turning moment calculations.

09

2 Balancing:

Introduction, Static Balancing, Dynamic Balancing, Transference of Force

from One Plane to Another Plane

(a) Balancing of Rotating Masses: Introduction, Balancing of Rotating Masses in the same plane, Balancing Masses Rotating in different planes (Analytical & Graphical Methods)

(b) Balancing of Reciprocating Masses: Introduction, Primary & Secondary Unbalanced Forces of Reciprocating Masses, Partial Balancing of Unbalanced Primary Force in a Reciprocating Engine, Partial Balancing of Uncoupled, Locomotives, Effect of Partial Balancing of Reciprocating Parts of Two Cylinder Locomotives

(c) Balancing of Primary Forces of Multi-cylinder In-Line Engines, Balancing of Secondary Forces of Multi-cylinder In-Line Engines, Balancing of V-Engines, Balancing of W-Engines, Balancing of Radial Engines; Direct & Reverse Crank Method (10 cylinders & 12-cylinders Engines)

Balancing Machines: In the Practical Session only.

11

3 Governors:

Introduction, Types of Governors, Watt Governor (Simple Conical Governor), Porter Governor, Proell Governor, Hartnell Governor, Hartnug Governor, Inertia Governor, Numerical based on these Governors

Sensitiveness of a Governor, Hunting, Isochronisms, Stability, Effort of a

Governor, Power of a Governor, Controlling Force.

09

4 Vibrations:

Introductions, Terms related to Vibrations, Causes of Vibrations, Applications of Vibrations, Types of Vibration, Basic Elements of Vibrations, Concept of Degree of Freedom

(a) Longitudinal Vibrations: Equilibrium Method, Energy Method & Rayleigh Method for finding Natural Frequency Expressions, Displacement, Velocity & Acceleration Vectors, Effect of the Mass of Spring, Damped Vibration, Logarithmic Decrement, Forced Vibration, Forced Damped Vibration, Dynamic Magnification Factor, Vibration Isolation and Transmissibility

(b)Transverse Vibrations: Single Point Load, Uniformly Distributed Load, Shaft carrying Several Loads (Dunkerly’s Method, Energy Method), Whirling of Shaft & Critical Speed

(c)Torsional Vibrations: Free Torsional Vibrations of Single Rotor

Systems, Inertia Effect of Mass of Shaft, Bifilar Suspension Method, Free

Torsional Vibrations of Two Rotor Systems, Torsionally Equivalent Shaft.

13

Total Hrs. 42

Reference Books:

1.S.S. Rattan, “Theory of Machines”, Tata McGraw Hill Publication Company Limited, New

Delhi.

2.Shigley J.E. & Uicker J.J., “Theory of Machines & Mechanisms”, McGraw-Hill

International Book Co.

3.Rao J.S. & Dukkipati R.V., “Mechanisms & Theory of Machines”, Wiley Eastern Ltd.

4.Wilson, “Kinematics & Dynamics of Machinery”, 3rd Edition, Pearson Education

5.Ashok G. Ambekar, “Mechanisms &Machine Theory”, 2nd Edition, PHI Learning Pvt.

Ltd., New Delhi.

6.Bevan Thomas, “Theory of Machines”, Pearson Education India

7.Mabie H. H. & Ocvirk, F.W., “Kinematic and Dynamics of Machinery”, 3rd Edition, John

Wiley & Sons.

8.Green W.G., “Theory of Machines”, London: Blackie (1964).

9.Hollowenko, A.R, “Dynamics of Machinery”, John Wiley and Sons. Inc. New York, 1955

10. Dr.Jagdishlal, “Theory of Mechanism and Machines”, Metropolitan Co. Pvt. Limited, New

Delhi.