MV3009 Mechanics of Marine Machines Syllabus:
MV3009 Mechanics of Marine Machines Syllabus – Anna University Regulation 2021
COURSE OBJECTIVE:
To impart knowledge to the students on.
• Mechanisms
• Theory of gearing
• Control mechanisms
• Balancing
• Vibration
UNIT I MECHANISMS
Introduction – science of mechanisms – terms and definitions kinematic inversion – slider crank chain inversions – four bar chain inversions – Grashoff’s law–Determination of velocities and acceleration in mechanisms – relative motion method (graphical) for mechanisms having turning, sliding and rolling pair – Coriolis acceleration Force Analysis Of Mechanisms : Static, Inertia and combined force analysis – graphical and analytical method – slider crank mechanism and four bar mechanism, turning moment diagram and flywheel – applications in engine, punching presses.
UNIT II THEORY OF GEARING
Classification of gears, law of gearing, nomenclature – involutes as a gear tooth profile –lay out of an involute gear, producing gear tooth – interference and undercutting – minimum number of teeth to avoid interference, contact ratio, internal gears – cycloid tooth profiles – comparison of involutes and cycloidal tooth forms, Backlash of Marine Gearing. Self-Shift Synchronous Gears.
UNIT III CONTROL MECHANISMS
Governors – gravity controlled and spring controlled – governor characteristics – governor effort and power – Gyroscopes – gyroscopic forces and couple – forces on bearing due to gyroscopic action – gyroscopic effects on the movement of air planes and ships, stability of two wheel drive and four wheel drive
UNIT IV BALANCING
Static and dynamic balancing – balancing of rotating masses – balancing of several masses in different planes – balancing of rotors, balancing machine, unbalance due to reciprocating parts – Balancing of inline engines – firing order – balancing of V and W engines – balancing of radial engines – Lanchester technique of engine balancing.
UNIT V VIBRATION
Periodic motion – non harmonic periodic motion – undamped free vibration – linear and torsion solution – natural frequency of single degree freedom system –– Free vibrations with viscous damping of single degree freedom system and solution – logarithmic decrement. Forced vibration of single degree freedom system with damping – reciprocating and rotating unbalance – vibration isolation and transmissibility System with two degrees of freedom – shaft with two rotors, system with many degrees of freedom –three rotor system – geared system- torsional vibration of major components in Ships – problems.
TOTAL:45 PERIODS
COURSE OUTCOMES:
On completion of the course the students will be able to:
CO1: Analysis the various forces
CO2: Classify the gears and identify various parameters of gears and gear trains
CO3: Evaluate Governors and gyroscopic forces & couple
CO4: Explain the Concept of Static and dynamic balancing
CO5: Problem analysis due to vibration.
TEXT BOOK
1. Rattan S.S, ‘’Theory of Machines’’, Tata McGraw-Hill Publishing Company Ltd., New Delhi, 1998.
2. Rao, J.S., and Dukkipatti, R.V., “Mechanism and machinery theory”, 2nd Edition, New age international, Mumbai, 1992.
3. Srikant Bhave, “Mechanical Vibrations”, 1st Ed. Pearson, 2010