Dynamics of Machines
Semester : V
Course Code : 18ME53
CIE Marks : 40 SEE Marks : 60
Module – 1
Module – 2
Module – 3
Module – 4
Module – 5
DYNAMICS OF MACHINES
Static force analysis: Static equilibrium, analysis of four bar mechanism, slider crank mechanism, shaper mechanism. Dynamic force analysis: D’Alembert’s principle, analysis of four bar and slider crank mechanism, shaper mechanism.
Balancing of Rotating Masses: Static and Dynamic Balancing, Balancing of single rotating mass by balancing masses in same plane and in different planes. Balancing of several rotating masses by balancing masses in same plane and in different planes. Balancing of Reciprocating Masses: Inertia Effect of crank and connecting rod, Single cylinder Engine, Balancing in multi cylinder-inline engine (primary and secondary forces), V-type engine, Radial engine – direct and reverse crank method
Governors: Types of Governors; Force Analysis of Porter and Hartnell Governors. Controlling Force, Stability, Sensitiveness, Isochronism, Effort and Power. Gyroscope: Vectorial representation of angular motion, Gyroscopic couple. Effect of gyroscopic Couple on plane disc, ship, aeroplane, Stability of two wheelers and four wheelers.
Free vibrations: Basic elements of vibrating system, Types of free vibrations, Longitudinal vibrationsEquilibrium method, D’Alembert’s principle, Energy method, Rayleigh’s method. Determination of natural frequency of single degree freedom systems, Effect of spring mass, Damped free vibrations: Under damped, over damped and critically damped systems. Logarithmic decrement.
Forced vibrations: Undamped forced vibration of spring mass system, Damped forced vibrations, Rotating unbalance, Reciprocating unbalance, Vibration isolation, Support motion(absolute and relative motion), Transverse vibration of shaft with single concentrated load, several loads, uniformly distributed load, Critical speed.