Course Code MEC403
Course Title Dynamics of Machines
Course Type Core
Course LTP 300
Course Credits 3
Course Assessment
● Continuous
50 (Sessionals, Assignments, Quizzes)
● End of 50 (University Examination)
Semester
Course
Kinematics of Machines
Prerequisites
1. To educate students on different gear and gear train
mechanisms
Course Objectives 2. To introduce functioning of various types of cams
3. To give knowledge about balancing and inertia forces of
various engine parts
1. Students will be able to design gears and understand
transmission of forces
2. Students will be able to design different types of cam
mechanism
Course Outcomes 3. Students will be able to understand the inertia forces
involved during engine force and power transmissions
4. Students can generate various mechanisms related to
lower pairs and solve engine problems related to
balancing of rotating and reciprocating parts
Syllabus
Note - The examiner will set seven questions of equal marks. The first question, which
is compulsory, will cover the entire syllabus, having ten conceptual questions of one
mark each or five questions of two marks each. Rest of the paper will be divided into
two parts having three questions each and the candidate is required to attempt at
least two questions from each part.
Part A
1. Inertia Forces in Mechanism: Determination of Forces and couples for a link,
inertia of reciprocating parts, dynamically equivalent system. Analytical and
graphical methods, inertia force analysis of basic engine 5 mechanism (crank,
connecting rod and piston etc). Torque required to overcome inertia and
gravitational force of a four bar linkage.
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2. Lower Pairs, Universal Joint - single and double, calculation of maximum
torque, Oldham’s Coupling, steering mechanism including. AcKermann’s and
Davis steering mechanism. Mechanisms with lower pairs, pantograph, exact
and approximate straight line motion, engine indicators.elliptical trammel .
3. Gyroscope - Definition, axis of spin, axis of precession gyroscope, gyroscopic
couple, Gyroscope effect on the momentum of ships and vehicle, ship
stabilization, stability of automobile and locomotive taking a turn.
4. Cams:Types of cams and followers, definition – basic circle & least radius,
angle of ascent, dwell, 7 descent & action. Displacement, velocity and
acceleration diagrams for the followers with uniform velocity motion, simple
harmonic motion, uniform acceleration and retardation, determination of
maximum velocity, acceleration and retardation, analysis of follower motion for
pre-specified cam profiles (tangent cams and convex cams).
Part B
5. Balancing: Classification , need for balancing, balancing for simple and multiple
masses, static and dynamic balancing – Primary and secondary balancing for
reciprocating masses, inside and 7 outside the cylinder locomotive balancing,
swaying couple and variation of tractive effort, partial balancing of locomotive,
balancing of the coupled locomotives and its advantages multi cylinder in the
line engines ( primary and secondary balancing conditions and their
applications ), balancing of V-engines balancing machines (Static balancing
M/c: dynamic balancing M/c, universal balancing M/c), introduction of balancing
of the flexible rotors.
6. Gears: Toothed gears are their uses, types of toothed gears (spur gears,
internal spur gears, spur and rack, bevel gears, helical gears, double helical
gears, spiral gears, worm gears) definitions, pitch circle diameter, pitch
surface, pitch point, circular pitch, diametral pitch, module pitch, addendum,
dedendum, clearance addendum circle, outside diameter, internal diamete
r, dedendum circle, root diameter ,base. Base circle diameter, face and flank
of tooth, fillet, angle of obliquity or pressure angle, path of contact, arc of
contact, arc of approach, condition for correct gearing, forms of teeth, cycloid
and its teeth variants epicycloids and hypocycloid, involute methods of dr
awing in involute and
cycloidal curves, interference in involute gears and methods of its remov
al, comparison of involute and cycloidal gear systems.
7. Gear Trains:
Types of gear trains single and compound epicyclic gear trains, Problem
s involving their applications, estimation of velocity ratio of worm and worm
wheel, helical and spiral gears (Determination of No. teeth, spiral angle and
efficiency).
Textbooks
113
Title Author Publisher
Theory of Machines and Mechanisms Uicker OUP (2009)
Kinematics, Dynamics, and Design of Machinery Waldron Wiley (2016)
Mechanisms and Machines: Kinematics, Dynamics, Stanisic Cengage (2014)
and Synthesis
Kinematics and Dynamics of Machinery Wilson Pearson (2008)
Norton McGrawHill
Kinematics and Dynamics of Machinery
(2017)
References
Title Author Publisher
Fundamentals of Kinematics and Dynamics of Vinogradov CRC (2000)
Machines and Mechanisms
Kinematics and Dynamics of Mechanical Rusell CRC (2018)
Systems: Implementation in MATLAB® and
SimMechanics®
Theory of Machines Bevan CBS (2005)
Hannah Butterworth and
Mechanics of Machines I and II
Heinemann (1984)
Mechanics of Machines Cleghorn OUP (2015)
Principles of Vibration Tongue OUP (2002)
Martin Waveland Press
Kinematics and Dynamics of Machines
(2002)
Hall Waveland Press
Kinematics and Linkage Design
(1986)
Hall Waveland Press
Analysis of Mechanisms
(1987)
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Course Code MEC453
Course Title Dynamics of Machines (P)
Course Type Core
Course LTP 002
Course Credits 1
Course Assessment
● Continuous 50 (Practical Performance, Report Writing, and Viva Voce)
Course Prerequisites Kinematics of Machines
Course Objectives 1. To educate students on different gear and gear train
mechanisms
2. To introduce functioning of various types of cams
3. To give knowledge about balancing and inertia forces of
various engine parts
Course Outcomes 1. Students will be able to design gears and understand
transmission of forces
2. Students will be able to design different types of cam
mechanism
3. Students will be able to understand the inertia forces
involved during engine force and power transmissions
4. Students can generate various mechanisms related to
lower pairs and solve engine problems related to
balancing of rotating and reciprocating parts
List of Experiments
1. Balance experimentally the given known force by introducing two weight
(forces) parallel to the given force in two different planes and verify the result
by analytical method.
2. Study the dynamic balancing machine & balance of a given body i.e. rotor by
different methods.
3. Study the working and construction of the two types of steering gears. Draw
neat sketches of each type and measure the angle in Ackerman's steering gear
fined in different vehicles. Find the ratio of intersection of two arms from the
front axle to the base of the vehicle.
4. Study the different types of mechanisms for tracing out the approximate
straight line.
5. Find out the pressure distribution graph analytically & practically around a
simple Journal bearing under variable load conditions on the shaft.
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6. To plot n-Ɵ (follower displacement Vs cam rotation) curves for different cam
and follower arrangements
7. To study gyroscopic effect on rotating disc and to verify the gyroscopic couple
Experimentally.
8. Study the whirling speed apparatus and calculate the critical speed of the given
System.
9. To study the model of an Epicyclic gear train and to determine the speed ratio.
10. To study the various tooth profiles and to generate the involute profile on a
blank.
Textbooks
Title Auth Publi
or sher
References
Title Auth Publi
or sher
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