The Multi-body Dynamic Simulation Of Crankshaft For Sail-assisted Ship

With the global energy crisis and environmental deterioration, there is an increasingly need for more energy-saving and low-carbon technologies. Under these circumstances, sail-assisted ships stand out as a completely new gateway towards energy saving and environmental securing ships.In order to keep regular navigation frequency, sail-assisted ships which take advantage of marine diesel engine as well as wind power tend to operate in a constant speed mode. Yet due to the instability of wind power, the engine load tends to be unpredictable, especially under dramatic sudden increase or decrease of wind power, which will have detrimental influence on the main engine.Based on the discussion above, this paper simulates the main moving components with the Multi-body Dynamics Methodology. Therefore, it concludes the mechanical curves of crank pin and crank journal, which directly shed light on the mechanical features of crankshaft due to load mutation. Then based on the analysis of navigation mode of wind-sailed ships, this paper confirms the mechanical characteristics of dynamic coupling system as well as the realm of wind mutation via quantitative analysis methodology. Then after analyzing the three dimensional model and assembly of main moving parts of marine diesel engine with the help of finite element model analysis, this paper concludes the dynamic characteristics file of crankshaft thereby establishing the flexible model of crankshaft via ADAMS software. In addition, it enables the dynamic analysis of crankshaft to be disclosed due to flexible deformation.Last but not least, after modeling the main moving components of marine diesel engine on ADAMS platform, this paper establishes their virtual experimental platform. Moreover, in stark contrast of the feature points of crankshaft, this paper concludes their dynamic curves under transient conditions of increase or decrease of marine diesel engine load.