基于传递矩阵法的涡轮泵转子系统瞬态动力学特性预测和分析  

PREDICTION AND ANALYSIS TO THE TRANSIENT DYNAMIC CHARACTERISTICS OF THE TURBO-PUMP ROTOR SYSTEM BASED ON THE TRANSFER MATRIX METHOD

作　　者：肖明杰[1] 黄金平[2] 李锋[2] 

机构地区：[1]西北工业大学航天学院,西安710072 [2]西安航天动力研究所,西安710100

出　　处：《机械强度》2011年第6期900-906,共7页Journal of Mechanical Strength

摘　　要：提出一种快速预测涡轮泵转子瞬态动力学特性的方法。在该方法中广义的涡轮泵转子系统转轴被盘和轴承等特征部件分成不同的轴段,每一轴段两端的状态向量通过该轴段的传递矩阵联系起来,经过轴承和特征盘后状态向量的变化以增量的形式给出,结合边界条件以及各特征盘/轴承之间的位移关系,可建立整个转子系统的瞬态运动方程。为了验证该方法的有效性,结合涡轮泵的实际工况,分别模拟不同启动过程(如匀角加速度、指数角加速度、分段升速)中转子的瞬态动力学特性。文中的研究工作可为涡轮泵转子系统动力学设计及结构修改提供一定的参考。A fast method has been presented to analyze and predict the transient dynamic characteristics of the turbo-pump rotor.In this proposed method,the whole shaft of the generalized turbo-pump rotor system is required to be divided into different segments by the bearings and disks.The state vectors at the two end cross-sections of each divided shaft segment are associated by the corresponding local transfer matrix,and the variation of the state vector before and after the bearing or disk is given in the form of increment.On the basis of the local transfer matrix and the increment,a global transfer relationship of the rotor system can be established.Combining the boundary condition and the transverse displacement relationship between the disks/bearings,the equations of transient motion for a general rotor system are derived.The transient dynamic characteristics during different run-up processions（such as runs up in a constant,negative exponential and staged accelerations） and in contaminated speed have been simulated,which validate the efficiency and the practicability of the proposed method.These studying results can provide some help to the turbo-pump rotor system dynamic design and revision.

关 键 词：涡轮泵 转子系统 瞬态动力学特性 传递矩阵法 

分 类 号：TH113[机械工程—机械设计及理论] V434.21[航空宇航科学与技术—航空宇航推进理论与工程]