摘要
现代燃气轮机转子主要为拉杆转子,其形式分为中心单根或周向多根拉杆。无论哪种形式,拉杆转子已经不再是连续结构,轮盘之间的接触面将对转子动力学特性产生影响。首先分析了拉杆转子的受力情况,然后考虑接触面接触刚度对转子动力特性的影响,对传统的有限元方法进行了改进,并编写了相应的计算程序。最后计算了光轴、一对接触圆盘算例和某型真实燃气轮机拉杆转子的临界转速,并分别与传统有限元方法、三维有限元方法和测量值进行比较,验证了该改进有限元模型的正确性和有效性。
Modern gas turbine rotors mainly consist of tie-rod ones,and their forms can be classified as either central single tie rod type or circumferential multiple tie rod ones.No matter what form they assume,the tie-rod rotors are no longer of a continuous structure and the contacting surface between the wheel disks will influence the kinetic characteristics of rotors.The authors first analyzed the force bearing condition of the tie rod rotor,and then considered the influence of the contact surface rigidity on rotor kinetic characteristics.The traditional finite element method has been improved,and a corresponding calculation program,prepared.Finally,a bare shaft,a pair of contacting disk sample and the critical speed of the tie rod rotor of a certain type gas turbine were calculated.The calculation results were compared respectively with those obtained from the traditional and three-dimensional finite element method as well as the measured results,thus verifying the correctness and validity of the improved finite-element model.
出处
《热能动力工程》
CAS
CSCD
北大核心
2009年第3期305-308,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家973计划基金资助项目(2007CB210107)
关键词
燃气轮机
拉杆转子
临界转速
法向接触刚度
有限元方法
gas turbine tie-rod rotor,tie-rod rotor,critical speed,normal contact stiffness,finite element method
