“Dynamic Analysis Of Single Plate Friction Clutch” Shrikant V. Bhoyar Dr. G. D. Mehta Dr. J. P. Modak M.Tech (MED) student Asst. professor DEAN/R&D Priyadarshini College of Engg. Priyadarshini College of Engg. Priyadarshini College of Engg. Nagpur Nagpur Nagpur Abstract: In this study, a simple transmission system consisting of engine, clutch, gearbox and load is designed for the load lifting application. Stiffness of all the three shafts have been calculated and equivalent stiffness is calculated. Equivalent mass moment of inertia is also calculated. From this data, using the concepts given by Prof. DOW, duration of engagement period is calculated for the selected power transmission system and energy dissipated during engagement is also plotted as a function of time. The effect of excitation torque and damping coefficient on the amplitude of vibration is plotted for various values of excitation speeds. Results show that with increase in damping coefficient, the amplitude of vibration decreases and with decrease in excitation torque, vibration amplitude decreases. Keywords: Clutch; Friction; Frictional torque; Engine torque; Damping coefficient; excitation torque. 1. INTRODUCTION: The energy necessary for the motion of a vehicle is transmitted by the engine to the wheels through the flywheel, the clutch system and the driveline. The clutch takes the energy from the flywheel and transmits it to the driveline. During the engagement process, the friction torque acts upon the friction surfaces of the clutch as an engaging force for the driveline. A part of the energy transmitted through the driveline is transformed into other forms of energy by positive damping effects. If for some reasons the damping becomes negative, a part of the energy transmitted by the clutch can induce self-excited torsional vibrations of the driveline which can induce judder. The vibrations induced by an internal combustion engine are transmitted to the passenger compartment through the engine mounts and through the driveline. The clutch system, being mounted between the flywheel and the gearbox, influences the driveline vibrations and finally the vibrations and noise perceived by the driver. Friction clutch is treated as a power transmission path that is subjected to time-varying normal load. Friction clutch is an essential component in the process of power transmission, therefore all designers want to obtain the best possible performance with comfortable condition (reduce the noise and vibration as much as possible) for the friction clutches. The vibration and noise generated during clutch engagement is one of the biggest obstacles faced by designers. There are several disadvantages produced by vibration such as excessive and unpleasant stresses, rapid wear, large amplitude produced by resonance which will lead to failure of the system. To increase the efficiency of performance and reduce the noise, it is necessary to investigate the dynamic characteristics of system employing friction clutches. In order to study dynamic analysis of single plate friction clutch, system consisting of prime mover (engine), clutch, gear box and load shown in fig. has been considered. All the parts of the systems have been 1231 International Journal of Engineering Research & Technology (IJERT) Vol. 2 Issue 7, July - 2013 ISSN: 2278-0181 www.ijert.org IJERTV2IS70495