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http://dx.doi.org/10.5139/JKSAS.2006.34.5.039

Detecting Location and Depth of Cracks in Rotor using Critical Speed  

Kim, Heung-Su (인하대학교)
Jo, Maeng-Hyo (서울대학교)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.34, no.5, 2006 , pp. 39-45 More about this Journal
Abstract
Structural health monitoring has been conducted by non-destructive evaluation method when a turbine rotor system of an aircraft engine has cracks. Local stiffness of a turbine rotor system is degraded and critical speed is changed due to the presence of cracks in rotor. Critical speed which is affected by location and depth of crack, is obtained using compliance matrix of cracked rotor. The database of the obtained critical speed is used to evaluate structural health monitoring of a rotor system of a gas turbine engine.
Keywords
Rotor; Crack; Critical speed; Structural health monitoring; Non-destructive evaluation;
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