Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Understanding and exploring virtual sensing and its capabilities for structural health monitoring
The increase in size and complexity of wind turbine blades makes maintenance and repair works harder to perform. Implementing a Structural Health Monitoring (SHM) process, so that the system can me monitored over time, brings many benefits in regards to the detection of damage. This study used Vibration-based Structural Health Monitoring (VSHM) to detect changes in structural behaviour, attributed to damage, by comparing the natural frequencies from the experimental structure with the ones from a simulated model, the experimental structure considered throughout this study was a cantilever beam. However, there are many limitations associated with the implementation of the sensors on in-service wind turbine blades. Thus, with the objective of diminishing the limitations associated with the placement of physical sensors along the structure, a vir- tual sensing technique was used to estimate the response at unmeasured locations from a limited set of response measurements. Hence, the system’s damage sensitivity was eval- uated for different combinations of measurement responses, virtual sensors and damage locations. The quality of expanded responses to virtual locations depends on the quality of the experimental responses and if the experimental responses obtained from the real sensors do not adequately represent the structure and/or don’t detect any damage, then expanding them to virtual locations might not have any effect in the damage detectabil- ity. However, the results showed that when damage is detected by the experimental measurements adding virtual responses enhances the system’s sensitivity to damage. ; O aumento em tamanho e complexidade das pás de aerogeradores dificulta a sua manu- tenção e reparação. A implementação de um processo de monitorização da condição da estrutura (SHM), para que o sistema possa ser monitorizado ao longo do tempo, acarreta muitos benefícios no que diz respeito à deteção de dano. Este estudo utilizou o méto- dos baseados em vibração (VSHM) para detetar alterações no comportamento ...
Understanding and exploring virtual sensing and its capabilities for structural health monitoring
The increase in size and complexity of wind turbine blades makes maintenance and repair works harder to perform. Implementing a Structural Health Monitoring (SHM) process, so that the system can me monitored over time, brings many benefits in regards to the detection of damage. This study used Vibration-based Structural Health Monitoring (VSHM) to detect changes in structural behaviour, attributed to damage, by comparing the natural frequencies from the experimental structure with the ones from a simulated model, the experimental structure considered throughout this study was a cantilever beam. However, there are many limitations associated with the implementation of the sensors on in-service wind turbine blades. Thus, with the objective of diminishing the limitations associated with the placement of physical sensors along the structure, a vir- tual sensing technique was used to estimate the response at unmeasured locations from a limited set of response measurements. Hence, the system’s damage sensitivity was eval- uated for different combinations of measurement responses, virtual sensors and damage locations. The quality of expanded responses to virtual locations depends on the quality of the experimental responses and if the experimental responses obtained from the real sensors do not adequately represent the structure and/or don’t detect any damage, then expanding them to virtual locations might not have any effect in the damage detectabil- ity. However, the results showed that when damage is detected by the experimental measurements adding virtual responses enhances the system’s sensitivity to damage. ; O aumento em tamanho e complexidade das pás de aerogeradores dificulta a sua manu- tenção e reparação. A implementação de um processo de monitorização da condição da estrutura (SHM), para que o sistema possa ser monitorizado ao longo do tempo, acarreta muitos benefícios no que diz respeito à deteção de dano. Este estudo utilizou o méto- dos baseados em vibração (VSHM) para detetar alterações no comportamento ...
Understanding and exploring virtual sensing and its capabilities for structural health monitoring
Pereira, Ana Sofia Arvelos (Autor:in) / Silva, Tiago / Cava, David
01.12.2021
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
624
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