船舶推进轴系纵向振动及其控制技术研究进展

t  目的  轴系的纵向振动是引起船体振动的重要因素之一，安装纵向减振器能有效减小轴系纵向振动，进而控制船体的振动噪声，但减振器参数的变化会引起轴系振动特性的变化。t  方法  以某轴系试验平台为研究对象，建立有限元模型，在直线校中状态下，分析轴系纵向刚度与其纵向振动的关系。在此基础上，建立该轴系纵向减振模型，对减振器参数进行无量纲化，保持减振器质量不变，采用寻优算法求解减振器的优化阻尼值和刚度值。t  结果  通过比较轴系纵向减振器参数优化前、后轴系的纵向振动频域响应情况，表明减振器参数优化后可有效减小该轴系的纵向振动。t  结论  研究结果能够为轴系纵向减振器参数优化提供理论依据。

Review of advances on longitudinal vibration of ship propulsion shafting and its control technology

The longitudinal vibration of the ship shaft system is the one of the most important factors of hull stern vibration, and it can be effectively minimized by installing a longitudinal vibration absorber. In this way, the vibration and noise of ships can be brought under control. However, the parameters of longitudinal vibration absorbers have a great influence on the vibration characteristics of the shaft system. As such, a certain shafting testing platform was studied as the object on which a finite model was built, and the relationship between longitudinal stiffness and longitudinal vibration in the shaft system was analyzed in a straight alignment state. Furthermore, a longitudinal damping model of the shaft system was built in which the parameters of the vibration absorber were non-dimensionalized, the weight of the vibration absorber was set as a constant, and an optimizing algorithm was used to calculate the optimized stiffness and damping coefficient of the vibration absorber. Finally, the longitudinal vibration frequency response of the shafting testing platform before and after optimizing the parameters of the longitudinal vibration absorber were compared, and the results indicated that the longitudinal vibration of the shafting testing platform was decreased effectively, which suggests that it could provide a theoretical foundation for the parameter optimization of longitudinal vibration absorbers.