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What are the factors that contribute to nonlinear vibrations in a crankshaft?

Reciprocating compressor

Torsional vibration

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Nonlinear vibrations in a crankshaft are influenced by various factors. The presence of friction between the piston and cylinder, as well as the operating speed, significantly impact the torsional vibration response of the shaft system . Additionally, the variable moment of inertia of the linkage and piston, coupled with the coupling effect between torsional and axial vibrations, play a crucial role in inducing nonlinear vibrations in marine diesel crankshaft systems with propellers . The non-constant inertia of reciprocating components and structural damping of shaft segments also contribute to nonlinear dynamics in crankshaft assemblies, affecting natural frequencies and mode shapes . These factors collectively highlight the complexity of nonlinear vibrations in crankshafts and underscore the importance of considering them in dynamic modeling and analysis.

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Journal Article•DOI Non-linear torsional vibration characteristics of an internal combustion engine crankshaft assembly Ying Huang, Shouping Yang, Fujun Zhang, Changlu Zhao, Qiang Ling, Haiyan Wang - Show less +5 more 18 Jul 2012-Chinese Journal of Mechanical Engineering 21 Citations	Non-constant inertia of reciprocating components and structural damping of shaft segments are key factors contributing to nonlinear vibrations in a crankshaft assembly.
Open access•Journal Article•DOI Analysis of the influence of piston–cylinder friction on the torsional vibration characteristics of compressor crankshaft system Tao Li, Zhen Ping Chen, Kai Zhang, Jiefei Wang, Zhi-hua Huang - Show less +4 more 30 Aug 2022-Nonlinear Dynamics	Factors contributing to nonlinear vibrations in a crankshaft include friction between piston and cylinder, affecting natural frequency fluctuation, amplitude, and vibration speed, influenced by friction coefficient and operating speed.
Posted Content•DOI Analysis of the influence of piston-cylinder friction on the torsional vibration characteristics of compressor crankshaft system 23 Mar 2022 1 Citations	Friction between piston and cylinder and operating speed are key factors contributing to nonlinear vibrations in a compressor crankshaft system, affecting its torsional vibration characteristics.
Proceedings Article•DOI Influence of the coupling effect between torsional and axial vibration on the dynamic characteristics of the crankshaft system Suohuai Zhang, Jun Guo - Show less +1 more 18 Sep 2009 4 Citations	Variable moment of inertia and coupling effect between torsional and axial vibration are fundamental factors contributing to nonlinear vibrations in a crankshaft system.
Open access•Journal Article•DOI Dynamic Coupling Characteristics of the Crankshaft System Yi-Ping Li 10 Mar 2017-DEStech Transactions on Environment, Energy and Earth Science 2 Citations	Variable moment of inertia and coupling effects between torsional and axial vibrations are key factors contributing to nonlinear vibrations in a crankshaft system.

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