摘要
针对船用发电汽轮机转子的结构工作特点,在合理简化的基础上建立其有限元分析模型。利用数值仿真软件计算转子的固有频率和振型,并对未含缺陷和含缺陷转子进行不平衡响应分析。结果表明,船用发电汽轮机转子结构的设计具有良好的刚度性能;转子复速级第一、二级存在1、2个叶片断裂缺陷时,对转子的振动幅值影响并不明显,随着叶片断裂脱落数目的增加,其一阶响应幅值急剧增加。所得结果能为故障的诊断提供基础数据,延长汽轮机转子寿命,保证船舶安全可靠地运行具有重要意义。
Based on the reasonable simplification of the actual structure,the finite element model of the marine power generation steam turbine rotor was built.The modal analysis of the rotor was done,the unbalance response of rotor model and the rotor model containing defects were calculated.The result shows that the modeling of the rotor is reasonable and the rotor structure is good in stiffness.And the vibration amplitude is not obvious at the first or second disk when the rotor model contains one or two blades missed.With the increase of the number of blades broke off,the vibration amplitude increases very quickly.The result can provide basic data for the fault diagnosis,and it is of great significance for prolonging the life of the rotor and ensuring its safe and reliable operation.
出处
《舰船科学技术》
北大核心
2014年第3期62-67,共6页
Ship Science and Technology
