Course Code: MET304
Course Name: DYNAMICS AND DESIGN OF MACHINERY
Course Prerequisite: EST100 Engineering Mechanics
Course Objectives:
This course focuses on important topics of dynamics of machinery and design of machine elements. It covers the topics namely force of four bar mechanisms, design of flywheels, welded joints, riveted joints and spring. Design of machine elements due to impact, shock and fatigue loading are covered in the syllabus. Analysis of free and forced vibration of single degree of freedom systems and a brief introduction about free vibration of two degree of freedom systems is also included.
Course Outcomes:
The students will be able to
CO1: Do engine force analysis and to draw turning moment diagrams
CO2: Analyse free and forced vibrations of single degree of freedom systems
CO3: Determine the natural frequencies of a two degree of freedom vibrating system and to calculate the stresses in a structural member due to combined loading.
CO4: Design machine elements subjected to fatigue loading and riveted joints.
CO5: Design welded joint and close coiled helical compression spring
Course References:
R1. Charles E Wilson and J Peter Sadler, Kinematics and Dynamics of Machinery, Tata
McGraw-Hill Education, 2008.
R2. Amithabha Ghosh and Asok Kumar Malik, Theory of Mechanisms and Machines, EastWest Press, 2011
R3. Robert L Norton, Design of Machinery, Tata Mc Graw-Hill, 2005
R4. P C Sharma and D K Aggarwal, Machine Design, S K Kataria & Sons
Curriculum
- 5 Sections
- 27 Lessons
- 10 Weeks
- Module -1Dynamic force analysis- D’ Alembert’s principle –four bar mechanism- engine force analysis (reciprocating engines)- piston side thrust-connecting rod force-piston effort- dynamic force analysis considering mass of the connecting rod-analytical method. Flywheels-turning moment diagrams for four stroke internal combustion engine and multi cylinder engines-coefficient of fluctuation of speed-coefficient of fluctuation of energy design of flywheels.8
- 1.1D’Alemberts Principle
- 1.2Engine force analysis (reciprocating engines)
- 1.3piston side thrust-connecting rod force-piston effort- dynamic force analysis- Problem
- 1.4Fly Wheel
- 1.5Turning moment diagrams for four stroke internal combustion engine
- 1.6turning moment diagrams for four stroke multi cylinder engines
- 1.7coefficient of fluctuation of speed
- 1.8coefficient of fluctuation of energy design of flywheels
- Module - 2Introduction- free vibration of single degree undamped systems- natural frequency-energy method- Newton’s second law (free body diagram)-damped systems- logarithmic decrement. Forced vibration-single degree of freedom systems-harmonic excitation-vibration isolation transmissibility-whirling of shafts6
- Module -3Introduction to two degree of freedom systems- natural frequencies and mode shapes. Introduction to design-definition, steps in the design process, materials and their properties- elastic and plastic behaviour of metals, ductile and brittle behaviour, shear, bending and torsional stresses, combined stresses, stress concentration factor.6
- Module -4Shock and impact loads- fatigue loading- Gerber, Goodman and Soderberg criteria, endurance limit stress, factors affecting endurance limit, factor of safety. Deign of riveted joints- material for rivets, modes of failure, efficiency of joint, design of boiler and tank joints, structural joints.7
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