燃气轮机是高效清洁的发电和动力设备，涉及多学科的核心技术，其发展关乎国家的能源与国防安全。拉杆组合转子是燃气轮机的关键部件，转子中各接触界面（端面摩擦或端面齿）因故障而分离将改变转子的动力学特性并影响转子的安全性。本项目以拉杆式转子中的两类接触界面为研究对象，对其接触界面的非线性动力学特性和相应的故障机理进行研究。首先，通过理论分析建立接触界面的非线性力学模型，即转子接触界面在故障下的刚度模型和附加激振力模型。然后通过三维接触有限元法建立整个转子系统的力学模型，该模型考虑接触界面的非线性动力学特性；同时将对接触界面故障状态下的非线性动力特性进行理论分析，以揭示其对拉杆转子动力学特性的影响特征。利用已获国家发明专利的拉杆转子实验台对拉杆转子接触界面各种故障状态下的动力学特性进行模拟实验，从理论和实验上阐明拉杆转子接触界面故障的机理，建立该类故障的识别方法，为拉杆转子的安全性奠定理论基础。

The gas turbine is a clean, high efficiency power generation and power equipment, the multidisciplinary key technologies development related to the country's energy and defense safety. Rod fastened rotor is the key part of the gas turbine (friction surface or tooth connection) of the rotor, each of the contact interface due to the failure separating the dynamic characteristics of the rotor will be changed and affect the safety of the rotor. This project will study the two types of contact interface in this rotor, the nonlinear dynamics of the contact interface and the corresponding failure mechanism. First, through theoretical analysis of nonlinear mechanical model, namely the contact interface stiffness model during contact interface failure and additional exciting force model in the rotor will be established. Then the mechanical model of the entire rotor system will be built by three-dimensional contact finite element method, the model takes into account the nonlinear dynamics of the contact interface. By the way the nonlinear dynamic characteristics of the contact interface failure state will be analysed by theory, in order to reveal the characteristics of the rotordynamics during the contact interface failure. The patented rotor test rig will be used to test the all kinds of contact interface faults in this rotor. Theory and experiment are used to clarify contact interface failure mechanism of this rotor. The failures identification method will be setup and lay the theoretical foundation for gas turbine rotor safety.