Page 1 of 5

Department of Mechanical Engineering

National Institute of Technology, Tiruchirappalli

COURSE PLAN – PART I

Name of the programme and specialization

B.Tech – Mechanical Engineering

Course Title Mechanics of Machines II

Course Code MEPC23 No. of Credits

3

Course Code of Pre-requisite subject(s)

MEPC17 – Mechanics of Machines I

Session July 2018

Section (if, applicable)

A

Name of Faculty Dr.-Ing. Ashok Kumar Nallathambi Department

Mechanical Engineering

Email nashok@nitt.edu Tel. 95003 10739

Name of Course Coordinator(s) (if, applicable)

E-mail

Course Type Core course Elective course

Syllabus (approved in BoS)

Part I : Static and inertial force analysis of mechanisms

Part II : Balancing: rotating masses in single and several planes- reciprocating masses- single and multicylinder engines-Lanchester balancer Part III : Gyroscopes: Gyroscopic effect- gyroscopes and their uses Flywheel: industrial uses of flywheels- design of a flywheel of IC engines and punch press Part IV: Mechanical vibrations: linear and torsional vibrations- two rotor, three rotors and multi rotor systems- damped vibrations- coupled vibrations-forced vibrations- -vibration sensors Part V: Vibration control: philosophy of vibration control-vibration isolations- suspension systems-tuned vibration absorbers- uses of vibration in condition monitoring COURSE OBJECTIVES

1. To establish strong foundation in kinetics of mechanisms 2. To familiarize balancing methods for rotating and reciprocating masses 3. To introduce gyroscope and flywheels

Page 2 of 5

4. To familiarize fundamentals of vibrations in machineries 5. To understand vibration control

COURSE OUTCOMES (CO)

Course Outcomes Aligned Programme Outcomes (PO)

1. Perform static and dynamic analysis of mechanisms 1,2,3,5

2. Understand the issues related to balancing of reciprocating and rotating machinery

5,4,3,2,1

3. Know the working of gyroscopes and flywheels

1,2,3,8,12

4. Have understanding about the effect of vibration and vibration control

4,3,2,1,8,12

COURSE PLAN – PART II

COURSE OVERVIEW

This course introduces the systematic methodologies for the students to understand the kinetics of mechanisms. Dynamic force analysis in linkages, and balancing of rotating and reciprocating masses will bring the knowledge of shaking force and moment. Engine dynamics, energy storage in flywheel, and gyroscopic effects will be introduced. Mechanical vibrations and its damping methods will be discussed in detail.

COURSE TEACHING AND LEARNING ACTIVITIES

S.No.

Week/Contact Hours

Topic Mode of Delivery

1 1st Week

Fundamentals of dynamics : center of mass, mass moment of inertia, principle of virtual work

Lecture & Tutorial

2 2nd week

Dynamic force analysis : Newtonian method, fourbar linkage, slider crank, shaking force and moment

3 3rd Week

Balancing: Inplane force balance and out of plane moment balance in rotating masses

4 4th Week

Balancing: linkage force and moment balance

5 5th Week

Engine Dynamics: Gas Torque and Force, crank phase diagram

Lecture & Tutorial

Page 3 of 5

6 6th Week Balancing of single cylinder multicylinder engines

16.08.18 CYCLE TEST 1

7 7th Week

Flywheels : Turning moment diagram, maximum fluctuation of energy and speed, energy stored

Lecture & Tutorial

8 8th Week

Gyroscope: rigid body motion in 3D, Euler’s equation, symmetrical rotor

9 9th Week

Gyrodynamics ,Effect of Gyroscope in ship and flights

10 10th Week

Introduction to vibration, Types of vibration, single DoF system

19.09.18 CYCLE TEST 2

11 11th Week

Free vibration of rigid bodies, Forced vibrations

Lecture & Tutorial

12 12th Week

Damped vibrations, types of damping,

13 13th Week

Vibration control, vibration isolation in suspension systems

14 14th Week Active and passive control, tuned vibration absorbers, condition monitoring

15 31.10.2018 01.11.2018 02.11.2018

Project Presentation

16 Final Exam

Page 4 of 5

COURSE ASSESSMENT METHODS (shall range from 4 to 6)

S.No. Mode of Assessment Week/Date Duration % Weightage

1 Cycle Test 1 6th week /

16.08.2018 1 hr 30 min 15

2 Cycle Test 2 11th week / 19.09.2018

1 hr 30 min 15

3 Final Exam 2 hr 30 min 40

4 Assignments 5 (each topics

I-V, 3x5) 15

5 Project Work 15th week /

31.10, 01.11, 02.11.2018

5 mintues per student

15

CPA

Compensation Assessment*

13th week / 04.10.2018

1 hr 30 min 15

*mandatory; refer to guidelines on page 4

COURSE EXIT SURVEY (mention the ways in which the feedback about the course shall be assessed)

1. Feedback from the students during class committee meeting. 2. At the end of every cycle test, feedback will be obtained for the improvement 3. End semester feedback on Course Outcomes.

COURSE POLICY (preferred mode of correspondence with students, compensation assessment policy to be specified)

MODE OF CORRESPONDENCE (email/ phone etc)

1. Per Email (nashok@nitt.edu) 2. Student meeting hours: Monday & Wednesday 17:15 – 18:15

(during this time period, students can come and discuss about their doubts, projects, and assignment works)

3. Strictly not by phone after the working hours (09:00 – 18:15) COMPENSATION ASSESSMENT POLICY Whomever missed the cycle test 1 or 2, can compensate on 04.10.2018. Syllabus for the test should be the topics covered up to last week before the test. Students who missed both the cycle test can get only ONE compensation of 15%.

ATTENDANCE POLICY (A uniform attendance policy as specified below shall be followed)

At least 75% attendance in each course is mandatory.

A maximum of 10% shall be allowed under On Duty (OD) category.

Students with less than 65% of attendance shall be prevented from writing the final

assessment and shall be awarded 'V' grade.