【摘要】 为了研究汽轮机组两端轴封的汽封力对转子振动与稳定性的影响,构建了较完整的具有两端轴封、双轴承的单盘单跨转子结构模型。除考虑转子的弯曲、剪切效应及轴的不对称等因素的影响外,还综合考虑了Muszynska汽封力和非稳态轴承油膜力联合作用的影响,运用Hamilton原理建立转子系统的非线性动力学模型,并进行了模型求解。更多还原

【Abstract】 In order to study the impact of steam seal force,due to the steam turbine seals clearance,on the rotor vibration and stability,a complete structural model of single-disc and single-span continuous rotor system with double bearings and shaft seals is set up.Besides the nonlinear factors such as bending,shearing effect and shaft asymmetry,this paper takes the combined influence of both steam seal force,described by Musznyska model,and short bearing unsteady oil-film force into consideration.A nonlinear dynamic model of rotor system is built based on the Hamilton principle and is solved.更多还原