多场耦合转子系统的动力学建模与特性分析

项目名称： 多场耦合转子系统的动力学建模与特性分析

项目编号： No.11272170

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 褚福磊

作者单位： 清华大学

项目金额： 88万元

中文摘要： 电力工业在国民经济发展中扮演着十分重要的角色。随着发电机组单机容量的逐步增大，机组轴系振动引起的运行稳定性问题变得日益突出。本项目针对火电机组和水电机组轴系多场耦合的特点，重点分析涡轮偏心对流体载荷的影响，涡轮处流体附加质量、转动惯量和阻尼，冷却气体流量周向不均匀导致的转子热效应，电网对机组轴系振动的影响，建立综合考虑流场，温度场和电磁场影响的轴系弯扭耦合转子动力学模型。综合运用理论分析、数值仿真和实验研究，分析转子系统的运行稳定性和典型激励下转子的动力学响应。提出多场耦合条件下，系统、通用的转子动力学建模方法，并发展高维、非线性转子系统的全局稳定性分析方法和动力学响应计算方法。获得流体、热和电磁参数对轴系振动的影响规律。为大型发电机组的安全、稳定运行提供理论依据和技术保障，推动我国电力工业的进一步发展。

中文关键词： 转子动力学；多场耦合；流固耦合；热效应；电磁

英文摘要： Power industry plays an important role in the development of the national economy. With the increasing of single-machine capacity of the generator set, the operation stability of the rotor system faces more challenges. In view of the multi-field coupling in thermal power unit and hydroelectric unit, the lateral-torsional coupling dynamic model of the rotor system is established, in which, the influences of flow, thermal and electromagnetic field are included. In this project, four problems are investigated in detail: 1, the influence of the eccentric on the fluid loading acting on the turbine; 2, the added mass and moment of inertia and the damping of the fluid around the turbine; 3, the thermal effect on the rotor system caused by the unsymmetric cooling; 4, the influence of power network on the vibration of the rotor system. Combining theoretical analysis, numerical simulation and experimental study, the operation stability of the rotor system and the dynamic response with the common excitations are analyzed. Based on these studies, the systemic and general dynamic modeling method for rotor system with multi-field coupling is presented, and the analysis method of operation stability and the calculation method of dynamic response for high dimensional nonlinear rotor system are developed. The influences of fluid

英文关键词： Rotor Dynamics；Multi-Field Coupling；Fluid Structure Interaction；Thermal Effect；Electromagnetism