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Stability control of a novel frame integrated with an SMA-MRF control system for marine structural applications based on the frequency analysis

Zareie, S ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apor.2020.102091
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. Structural integrity and ensuring the stability of steel frame structures, including marine and coastal structures, are the main challenges for designers in civil infrastructures, particularly in oil platforms, subjected to tough periodic and non-periodic environmental loading conditions. Variable loadings with different amplitudes and frequencies may lead to the stability of steel structures loss. In order to keep the stability of the steel structures and prevent possible damages, reliable yet efficient structural control systems are in demand. Conventional structural control systems need significant activation energy and/or in-depth users knowledge to be effective. Most recently, smart materials and systems, notably shape memory alloy (SMA) and magnetorheological fluid (MRF), are considered to replace with the conventional systems. In this study, the SMA-MRF based structural control systems are installed in a simplified marine structure to investigate the frequency responses of the structure subjected to three scaled ground motions. Three structural parameters including the root-mean-square (RMS), the peak displacement, and particularly the frequency analysis are studied. The results show remarkable enhancement in structural behavior equipped with the SMA-MRF based system. © 2020 Elsevier Ltd
  6. Keywords:
  7. Damage ; Frequency response ; Magnetorheological fluid ; Marine structures ; Maximum displacement ; RMS displacement ; Shape memory alloy ; Structural control system ; Activation energy ; Control systems ; Magnetorheological fluids ; Marine applications ; Ocean structures ; Shape memory effect ; Shape-memory alloy ; Stability ; Steel structures ; Structural dynamics ; Structural frames ; Magnetorheological fluids (MRF) ; RMS displacements ; Shape memory alloys(SMA) ; Smart materials and systems ; Structural applications ; Control system stability ; Alloy ; Amplitude ; Control system ; Damage mechanics ; Displacement ; Frequency analysis ; Loading ; Stability analysis ; Steel structure ; Structural analysis
  8. Source: Applied Ocean Research ; Volume 97 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0141118719302548