Multi-body system dynamics analysis and finite element simulation on marine power transmission system

The lumped parameter method is widely adopted in the vibration calculation of the transmission system currently.The aggregate analysis of the torsional vibration of the shafting,the transverse vibration,the extensional vibration and the structural vibration are not undertaken.In this thesis,the drive characteristics are researched applied the theory of the multi-body dynamics and the input conditions are supplied to the dynamic response analysis of the finite element model based on typical two-engined joint operating device(include diesel engine,the elasticity coupling,cardan shaft,driving gear,main shaft and output load).Through the dynamic simulation with transmission system,the finite element analysis model of the transmission shafting is established,and the dynamic responses of the shafting vibration and structural vibration are analyzed,and the experimental verification was proceeded.Meanwhile,the transmission characteristics of the structure vibration about transmission system are revealed.The influence regulations about the parameters of the elasticity couplings,rubber isolators to the structure vibration are discussed.Finally,through the analysis of the multi-body dynamics and the finite element dynamic responses,the simulation analysis method about the vibration of the transmission system is formed so as to perfect and enrich the research approach and theory of the transmission devices.