轮盘低循环疲劳试验裂纹在线监测系统应用研究  

Real-time crack detection system for low-cycle fatigue test

作　　者：王贺 王明 李建伟 高鹏 孙文辉 WANG He;WANG Ming;LI Jianwei;GAO Peng;SUN Wenhui(AECC Sichuan Gas Turbine Establishment,Mianyang 621010,China)

机构地区：[1]中国航发四川燃气涡轮研究院,四川绵阳621010

出　　处：《燃气涡轮试验与研究》2023年第4期44-48,共5页Gas Turbine Experiment and Research

摘　　要：针对现有轮盘低循环疲劳试验裂纹离线检测效率低、成本高昂、检出不及时等问题,提出一种用于实时识别、跟踪轮盘疲劳裂纹的工程实用在线监测系统。该系统将同步振动振幅和相位结合为向量,引入“基线”向量表征无裂纹平均响应,以向量差为裂纹特征参数,并进行了理论公式推导,建立了以相对幅值大小和变化速率为依据的自动停车规范。以真实轮盘低循环疲劳试验为应用对象,验证了系统的有效性。Aiming at the low efficiency,laborious costly and untimely detection of the crack in existing disc low-cycle fatigue test,a practical engineering method for real-time identification and tracking of disc fatigue cracks was introduced.The system combined the synchronous vibration amplitude and phase into a vector,introduced crack-free response of the“baseline”vector pin,proposed a vector difference as the crack characteristic parameter,and derived the theoretical formula.Then an automatic shut-down specification based on the relative amplitude and change rate was established.Taking the real disk low-cycle fatigue test as the application object,the effectiveness of this system and method has been verified.

关 键 词：低循环疲劳 裂纹在线监测 同步振动向量 基线 裂纹特征参数 停车规范 

分 类 号：V263.3[航空宇航科学与技术—航空宇航制造工程]