某冲压空气涡轮转子悬臂支撑结构动力特性分析  

Dynamic Characteristics Analysis of Cantilever Support Structure for Ram Air Turbine Rotor

作　　者：魏婷婷 姜鑫圣 朱旭 陈利强 王波 WEI Ting-ting;JIANG Xin-sheng;ZHU Xu;CHEN Li-qiang;WANG Bo(AVIC Jincheng Nanjing Engineering Institute of Aircraft System,Nanjing 211106,China)

机构地区：[1]中国航空工业集团公司金城南京机电液压工程研究中心,江苏南京211106

出　　处：《机械工程与自动化》2022年第1期97-99,共3页Mechanical Engineering & Automation

摘　　要：为探究某型起动机转子悬臂支撑结构设计的合理性,利用有限元软件ANSYS对比分析了轴承的支承刚度和支点跨距对转子的模态、临界转速及不平衡响应的影响。分析结果表明:当支承刚度增加时,转子各阶固有频率和一阶临界转速均增加,高阶固有频率和振幅增加显著;当支点跨距增加时,转子各阶振型和振幅无明显变化,各阶固有频率略有增加,一阶临界转速增大;轮盘端轴承位置的改变对临界转速和不平衡响应峰值的影响更大,轮轴末端轴承位置的改变对固有频率和不平衡响应峰值处频率的影响更大。In order to explore the rationality of the design of the cantilever rotor support structure of a certain type of starter, the finite element software ANSYS was used to compare and analyze the influence of the bearing support stiffness and fulcrum span on the rotor modal, critical speed and unbalanced response. The results show that when the support stiffness increases, the natural frequencies and first-order critical speeds of the rotor all increase, and the high-order natural frequencies and amplitude increase significantly. When the fulcrum span increases, there is no obvious change in the vibration shape and amplitude of each order of the rotor, the natural frequency of each order increases slightly, and the first-order critical speed increases. The change of the bearing position near the turbine wheel has a greater impact on the critical speed and the peak of the unbalanced response, and the change of the bearing position near the wheel shaft end has a greater impact on the natural frequency and the frequency at the peak of the unbalanced response.

关 键 词：空气涡轮 支撑结构 转子 动力特性 

分 类 号：TH113.1[机械工程—机械设计及理论] TP391.7[自动化与计算机技术—计算机应用技术]