A numerical simulation method was used to study the vibration characteristics of a large twostroke marine diesel engine, and in order to improve the accuracy of numerical calculation, the full size structure is adopted in the simulation model. The vibration mode and frequency response under different rotating speed were analyzed to avoid resonance of the diesel engine. The modal damping coefficient of the reciprocating diesel engine depends on the interaction of the structural parts in the vibration process and the dissipation rate of the energy. And in order to solve the problem of difficult selection of damping coefficient in numerical simulation of vibration characteristics of a large two stroke marine diesel engine, using a heuristic algorithm, and the diesel engine was regarded as a kind of multi degree of freedom spring mass damper system to get the optimal damping coefficient. The fitting analysis was carried out by experiments, and the accuracy of the algorithm was verified.
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刘俊国,邰新航,陈锦汾,郑卫刚.数值仿真在大型二冲程船舶柴油机上的振动特性分析[J].机床与液压,2017,45(6):89-95. . Analysis of vibration characteristics of large two-stroke marine diesel engine[J]. Machine Tool & Hydraulics,2017,45(6):89-95