Open AccessModal passport of dynamically loaded structures: application to composite blades
Author(s) -
Aleksejs Mironovs,
Deniss Mironovs
Publication year - 2019
Publication title -
modern building materials, structures and techniques
Language(s) - English
Resource type - Conference proceedings
eISSN - 2029-9907
pISSN - 2029-9915
DOI - 10.3846/mbmst.2019.091
Subject(s) - modal , modal testing , modal analysis , structural health monitoring , vibration , operational modal analysis , structural engineering , computer science , accelerometer , modal analysis using fem , engineering , acoustics , finite element method , materials science , physics , polymer chemistry , operating system
Close relation of modal properties to mechanical properties of structures presents interest for applied researchand solutions of Structural Health Monitoring (SHM) tasks. The paper considers application of analytical and modalanalysis techniques for structural research and monitoring of composite blades as well as required measurement tools.The Roving Hummer Technique (RHT) and Operational Modal Analysis OMA) were admitted as optimal methods formodal properties estimation, but 3-axial accelerometers and vibration deformation sensors – as most acceptable measurement tools. There is discussion of methodology and technical aspects required for modal properties estimation ofstatic and rotating blades. Samples of composite blades preparation for measurements and equipment applied for testingare considered. Authors discuss the modal passport concept as the platform for applied studies of modal properties andfor diagnostic purposes including Structural Health Monitoring (SHM) of operating structures. Typical modal passportstructure is described as the set of modal parameters that are common for same type of blades and generalized dependences of modal parameters from operational factors. The paper discusses the principles of modal passport applicationfor a particular blade based on its individual modal properties. There are conclusions about application of typical modalpassport in industry.