"Complex dynamic interactions of nonlinear, multis.. (UPGRADE)
"Complex dynamic interactions of nonlinear, multistage and localization phenomena in turbine engines: development and validation of efficient and accurate modeling techniques."
Start date: Sep 16, 2012,
End date: Mar 15, 2015
"Current and next-generation turbine engines will increasingly depend on onboard health monitoring and prognosis systems to help ensure the reliability, safety, and readiness of air vehicles.To effectively interpret the measurement data required for monitoring and prognosis of turbine engines, efficient reduced models that show to capture the essential complex dynamic interactions of nonlinear, multistage, and localization phenomena must be employed. In the research project, advanced structural dynamic models and experimental validations will be developed for turbine engine rotors.The main goals of the proposed research are:• To model and predict the nonlinear vibration response of a rotor with cracked blades or blades damaged by a foreign object, including accounting for random mistuning and multistage coupling.• To provide a fundamental physical understanding of localization phenomena in rotors due to individual and combined effects of mistuning and foreign object damage and/or cracks.• To identify localization phenomena and nonlinear vibration characteristics strongly associated with cracks to exploit them for structural health monitoring and damage detection.Although structural health monitoring tools will not be developed directly in this research, the work will help describe and understand the fundamental nonlinear structural dynamics so that the proposed modeling technologies can be used in health monitoring and prognosis applications.During the project, the fellow will acquire new competencies and skills in the field of non-linear modeling of cracked bladed disks and multi-stage modeling techniques of bladed disks, strengthening his academic profile in the field of modeling techniques and structural health monitoring of turbine engine.The fellowship will impact on the career development of the fellow and on the European excellence and competitiveness due to the novel technical competencies that will be developed and transferred to the EU."
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