船用汽轮发电机组多激励振动特性研究

Multi-excitation vibration characteristic study of marine turbine-generator unit

对船舶机舱动力系统典型设备汽轮机发电机组及浮筏隔振系统进行有限元三维实体建模,并分析了汽轮发电机组在自重的情况下引起的静变形;同时考虑联轴器和轴承的不对中效应,根据平衡条件,建立了转子-轴承动力学系统模型,在单轴向多激励加载模式下,计算得出不同工况下船舶汽轮机发电机组及浮筏隔振系统在激扰力下的最大振幅,初步揭示了其振动规律,为建立机舱动力设备振动特性预报方法提供了参考。

The typical power equipments that 3D solid model of marine turbine-generator unit and buoyant raft system are built in marine engine room by finite element method. Static deformation of marine turbine-generator unit and buoyant raft with self-weight is analyzed. The influence of the misalignment of the rotor system was considered,and that according as equilibrium condition,the dynamic model of rotor-shaft bearing system is built. The maximum amplitude of vibration of Turbine-generator unit is calculated with uniaxial multi-excitation load mode at different operating condition. It revealed the vibration rule of marine turbine-generator unit and buoyant raft and which supplies the reference for establishing the vibration characteristic prediction method of engine power equipment.