Paper Details

The scope of the paper is the study of the crankshaft torsional vibration phenomenon in internal combustionengines. The natural frequencies of torsional vibration of four cylinder diesel engine crankshaft are determined by finiteelement method. The natural frequency of a system is important as it is main cause of various types of failures likeresonance of the whirling modes of a crankshaft are suspected to be the cause of excessive bearing noise or fatiguefailure. The high level harmonic forcing torque developed in internal combustion engine can produce large torsionalstress level resulting in early fatigue in crankshaft. Therefore by knowing the natural frequencies and frequency modes ofthe engine the limitation in use of the engine working speeds can be fixed. A simultaneous iteration technique is used insolution of the finite element method. The frequencies obtained by the fast fourier transform (fft) analyzer and thoseobtained by fem are found in good agreement.

Shantanu Jayant Chaudhari, Krunal Chandrashekhar Chaudhari, “Frequency analysis of a four cylinder diesel engine crankshaft by using finite element method and FFT analyzer”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 10, pp. 229-237, October 2017.