Transient Dynamic Analysis of Crankshaft Torsional Vibration for Reciprocating Piston Compressor

The crankshaft of 6M50 type reciprocating piston compressor frequently cracked because of torsional vibration. To perform full analysis of crankshaft vibration of the compressor and solve the cracking problems completely, the finite element analysis software is used, and dynamic simulation of crankshaft torsional vibration is developed and analyzed. Finite element modeling process of compressor crankshafts is discussed, and the results of modal analysis for different modification plans are compared. Transient dynamic analysis of the system is performed. The basic cracking reason for crankshafts with different major diameters is explained theoretically by comparison of calculated and practical results.