为有效减少船舶推进轴系的纵向振动，提出动力减振系统与集成隔振系统耦合，探究其对振动抑制效果的影响。运用了结构弹性波原理构建出轴系纵振数学模型，通过与ANSYS模态分析结果对比验证了模型的正确性，采用拉格朗日方程法结合轴系一阶模态分别建立了三种不同系统下的振动微分方程，基于粒子群优化算法对减振系统参数优化，分别讨论了不同质量比、阻尼比以及频率比对系统的影响。研究表明：双系统耦合情况下，合理调节动力减振系统固有频率能最大程度叠加两系统的优点，为控制船舶轴系产生纵向振动时减振系统的安装设计提供了理论依据。
Abstract
To effectively mitigate the longitudinal vibration of the ship propulsion shafting, a coupling of the dynamic vibration damping system and the integrated vibration isolation system is proposed to investigate the impact effect on the vibration suppression. The structural elastic wave principle is employed to construct the mathematical model of the longitudinal vibration of the shafting. The accuracy of the model is verified by a comparison with the ANSYS modal analysis of published literature. The vibration differential equations under three different systems are established respectively by adopting the Lagrange equation method in combination with the first-order mode of the shafting. The parameters of the vibration damping system are optimized on the basis of particle swarm optimization algorithm. The influences of mass ratios, damping ratios, and frequency ratios on the vibration suppression of the system are discussed respectively. The research shows that the advantages of a single system can be superimposed to the maximum extent by adjusting the natural frequency of the dynamic damping system reasonably. It provides a theoretical basis for the installation design of the vibration damping system for the control of longitudinal vibration generated by the ship shafting.
关键词
船舶推进轴系 /
纵向振动 /
集成隔振系统 /
弹性波原理
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Key words
Ship propulsion shaft system /
Longitudinal vibration /
Integrated vibration isolation system /
Elastic wave principle
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参考文献
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