Course code : MET301
Course name : Mechanics of Machinery
Course Pre / Co-requisite: Engineering Mechanics (EST 100)
Course Objectives
- This course aims to introduce the students to the fundamentals of the kinematics of various mechanisms and also its analysis for its displacement, velocity, and acceleration.
- The course will also cover the design of cams, theory and analysis of gears, gear trains and synthesis of mechanisms. The static force analysis of planar mechanisms and concept of gyroscopic couple along with its effect has also been included.
- This course also aids students in estimating unbalance in rotating and reciprocating masses and suggesting methods to overcome it.
Course Outcomes
After the completion of the course the students will be able to
CO 1: Explain the fundamentals of kinematics, various planar mechanisms and interpret the basic principles of mechanisms and machines
CO 2: Perform analysis and synthesis of mechanisms
CO 3: Solve the problem on cams and gear drives, including selection depending on requirement.
CO 4 Calculate the gyroscopic effect in various situations
CO 5 Analyse rotating and reciprocating masses for its unbalance
Course References:
C. E. Wilson, P. Sadler, Kinematics and Dynamics of Machinery, Pearson Education,2005.
D.H. Myskza, Machines and Mechanisms Applied Kinematic Analysis, Pearson Education,2013
Curriculum
- 5 Sections
- 14 Lessons
- 10 Weeks
- Module 1- Kinematics and MechanismsIntroduction to kinematics and mechanisms - various mechanisms, kinematic diagrams, degree of freedom- Grashof’s criterion, inversions, coupler curves mechanical advantage, transmission angle. straight line mechanisms exact, approximate. Displacement, velocity analysis– relative motion - relative velocity. Instantaneous centre -Kennedy’s theorem.3
- Module 2- Acceleration analysis and Design of CAMAcceleration analysis- Relative acceleration - Coriolis acceleration - graphical and analytical methods. Cams - classification of cam and followers - displacement diagrams, velocity and acceleration analysis of SHM, uniform velocity, uniform acceleration, cycloidal motion Graphical cam profile synthesis, pressure angle.3
- Module 4- Gears and Kinematic SynthesisGears – Classification- terminology of spur gears – law of gearing -tooth profiles- involute spur gears- contact ratio - interference - backlash - gear standardization – interchangeability. Gear trains - simple and compound gear trains - planetary gear trains. Kinematic synthesis (planar mechanisms) - type, number and dimensional synthesis – precision points. Graphical synthesis for motion - path and prescribed timing - function generator. 2 position and 3 position synthesis – overlay Method. Freudenstein's equation.4
- Module4 - Static force analysis and gyroscopeStatic force analysis- Analysis of four bar linkages and slider crank mechanism, graphical method, Matrix method, principle of virtual work. Analysis of four bar and slider crank mechanisms with sliding and pin friction. Gyroscopic couples-spin, precession and applied gyroscopic couple vectors-effects on the stability of two wheelers, four wheelers, sea vessels and air crafts, application of gyroscopes3
- Module 5- Static and Dynamic balancingStatic balancing-dynamic balancing-balancing of several masses in the same plane-several masses in different planes-graphical and analytical method-force and couple polygons. Balancing of reciprocating masses -Single cylinder engine-multi cylinder engine -V-engine1
