The project would identify the impact of environmental effects (temperature and humidity) on natural frequency and mode shapes. The previous study on the feasibility of vibration-based monitoring highlighted the variation of natural frequency as a function of temperature and season; however, the variation was not consistent among mode shapes. In particular, the variation is not linear with temperature and not monotonic for some modes. If the phenomenon is well understood, the environmentally induced variations could be leveraged or compensated for to simplify the use of vibration-based monitoring.
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