航空发动机单盘转子变加速度过临界特性研究  

Study on Over-critical Characteristics of Aeroengine Single Disk Rotor with Variable Acceleration

作　　者：张佳慧[1] 魏林章 漆文凯[1] ZHANG Jiahui;WEI Linzhang;QI Wenkai(Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《机械制造与自动化》2023年第4期29-32,47,共5页Machine Building & Automation

摘　　要：为研究航空发动机弹性支撑单盘转子的动力特性,利用Lagrange能量法建立单盘转子瞬态运动微分方程,结合四阶Runge-kutta法进行积分,求解出单盘转子在一阶弯曲下临界转速特性及不同支撑刚度、不同加速速率下过第一阶临界转速的瞬态响应;对单盘转子进行有限元分析,验证数值模型的准确性。研究结果表明:数值模型与有限元模型结果相似,转子瞬态响应峰值滞后于临界转速,加速速率越大,瞬态响应峰值越靠后;在分段加速过程中,响应峰值对应转速及幅值只随过临界附近时的加速速率变化,与过临界前加速速率无关。In order to study the dynamic characteristics of the elastically supported single disk rotor,the transient motion differential equation of the single disk rotor is established by using the Lagrange energy method.Combined with the fourth-order Runge-kutta method,the critical speed characteristics of the single disk rotor under the first-order bending and the transient response over the first-order critical speed under different support stiffness and different acceleration rates are solved.The finite element analysis of single disk rotor is carried out to verify the accuracy of the numerical model.The results show that the numerical model is similar to the finite element simulation results.The peak value of rotor transient response lags behind the critical speed.The larger the acceleration rate is,the later the transient response peak value is.In the process of piecewise acceleration,the speed and amplitude corresponding to the response peak value only change with the acceleration rate near the critical,and has nothing to do with the acceleration rate before the critical.

关 键 词：航空发动机 弹性支撑 瞬态响应 数值仿真 有限元仿真 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]