내연 발전용 대형 디젤 엔진-발전기 축계의 종-비틈 연성진동 해석

Coupled Axial and Torsional Vibration Analysis in Large Diesel Engines and Generators for Stationary Power Plants

This paper presents results of coupled axial and torsional vibration analysis of shafting system in large diesel engines and generators for stationary power plants. Axial vibration of the shafting system takes place due to mainly torsional deformation or vibration and breathing effect of crank throws, caused by cylinder gas forces and reciprocating inertia of the engine. Cross-coupled stiffness matrix of the crank throws is calculated employing a finite element model of the crank throw and a static condensation method. Forced response analysis of the shafting system is performed using the calculated stiffness matrix and derived governing equations.