航空发动机典型电起动机包容性仿真  

Containment Simulation of a Typical Aeroengine Electric Starter

作　　者：姜鑫圣 刘冕 陈宸 JIANG Xin-sheng;LIU Mian;CHEN Chen(Nanjing Mechanical and Hydraulic Engineering Research Center,Aviation Industry Corporation,Nanjing 211106,China;Military Representative Office of the Air Force Equipment Department in Wuhu Region,Anhui Wuhu 241000,China)

机构地区：[1]航空工业集团公司南京机电液压工程研究中心,南京211106 [2]空军装备部驻芜湖地区军事代表室,安徽芜湖241000

出　　处：《航空发动机》2023年第5期161-166,共6页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：为了解航空发动机电起动机的包容能力,探究轮盘/圆环以外的高能转子失效包容机理,采用ANSYS/LS-DYNA软件开展了电起动机的包容性数值仿真,分析了转子组件以最大动能形式(3等分)失效与定子组件撞击作用过程。结果表明:电起动机的转子/定子撞击包容前后形变增加率仅为1.0%,各部件单元等效应力较小,材料未见明显失效,最大等效应力值出现在扣片与定子冲片的接触面上,转子组件总动能约消耗95.5%,转子冲片碎片与定子组件之间的平均撞击力峰值约为341 kN;该典型电起动机定子组件具有一定的自包容能力,临界包容转速约为66000 r/min,包容安全裕度为1.89,满足适航条款中的包容性安全要求;电起动机定子组件的“I”形截面径向夹层结构具有较好的包容性能。结果验证了该典型电起动机的包容能力,对轮盘/圆环以外包容结构设计具有指导意义。In order to understand the containment capacity of an aeroengine electric starter and explore the containment mechanism of the high-energy rotor other than the disk/ring,the containment numerical simulation was carried out using ANSYS/LS-DYNA software,and the impact process of the failed rotor assembly in the form of maximum kinetic energy(three equal parts)with the stator assembly was analyzed.The results show that the deformation increase rate of the rotor/stator before and after the impact is only 1.0%,the equivalent stress of each component unit is small,and the material exhibits no obvious failure.The maximum equivalent stress appears on the contact surface between the buckle and the stator laminations.The total kinetic energy consumption of the rotor assembly is about 95.5%,and the average peak impact force between the rotor fragments and the stator assembly is about 341kN.The typical electric starter stator assembly is self-contained to a certain extent,the critical rotor assembly containment speed is 66000 r/min,and the containment safety margin is 1.89,which can meet the containment safety requirements of airworthiness provisions.The“I”shaped cross-section radial sandwich structure of the electrical starter stator assembly exhibits good containment performance.The results verify the containment capability of the electric starter and provide guidance for the design of the containment structure besides the disk/ring.

关 键 词：电起动机 高能转子 包容性 临界包容转速 数值仿真 航空发动机 

分 类 号：V233.611[航空宇航科学与技术—航空宇航推进理论与工程]