【摘要】 在对油膜振荡进行非线性动力学分析的基础上,将其动力学响应作为位移边界条件,把损伤引入到材料的本构关系当中,考虑损伤与应力、应变的相互影响,采用全耦合的损伤力学分析方法对转子在油膜振荡行为下的损伤发展过程进行了分析,揭示了转子在油膜振荡行为下的疲劳破坏机制;同时分析了损伤与应力、应变的耦合作用对损伤演化、发展的影响,为汽轮机组的灾变防治和安全设计提供了一定的理论依据。更多还原

【Abstract】 Based on the analysis of the oil-whip of rotor bynonlinear dynamics, the responses are added to the FEA modelof rotor as boundary conditions.The damage variable isintroduced into the constitution equation and the interactiveeffects of damage and stress and strain are considered.Theevolution of the rotot under oil-whip is analyzed by thiscoupled-damage method and the failure machinery of the rotorunder oil-whip is discussed.Simultaneously,the effects of thecoupling function of the stress, strain and damage to damageevolution of rotor are also studied. Finally, some conclusionsare given to support the catastrophe prevention and safe designof steam turbine generator.更多还原