Due to increasing demand for structural safety and reliability in various industrial sectors, a great degree of effort has been made by researchers to propose various dynamic‐ and vibration‐based theories to monitor and detect structural defects and damage that occur over the operational lifetime of a system. This chapter proposes a comprehensive and novel study of structural health monitoring analysis in conjunction with the bond graph theory for implementation on large structures, specifically aeroengines. Bond graph methodology has been shown to be a useful technique in performing structural health monitoring by reducing testing and damage detection costs by reducing associated labor effort. In this chapter, a reduced aeroengine model has been developed. Using the developed bond graph model of the aeroengine, the governing dynamic equations of motion were determined. By implementing the global transmissibility concept, structural health monitoring and damage detection were implemented on the proposed aeroengine model. Using the obtained frequency response functions, defects and damage in the structure were theoretically detected and classified. Moreover, using the obtained transmissibility functions, damage indicator factors were determined to be of importance in localizing the damage within the structure. It was also shown that the damage indicator values can be used to determine the extent of damage and defect in the aeroengine when compared with experimental data. In addition to safety improvement, the obtained knowledge from the proposed analysis can be utilized to implement early design modification and guidelines based on the predetermined safety factors of the aeroengine, hence significantly improving reliability and operational lifetime of the aeroengine.
Structural Health Monitoring of Aeroengines Using Transmissibility and Bond Graph Methodology
2021-05-24
22 pages
Article/Chapter (Book)
Electronic Resource
English
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