Vibration analysis of transverse galloping of different bluff bodies

Varadha, E.; Rajakumar, S.; Immanual, R.; Jain, X.S. Ashok

doi:10.1016/j.matpr.2020.05.017

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Generally, to study fluid‐responding structure, the unsteady aerodynamic is given by the flowing equation [ 32 ] (the study model is shown in Figure 2b)

\begin{equation} {\mathrm{M}}_{\textit{tot}}\Ddot{Z}+D\dot{Z}+\textit{KZ}=0.5\rho {\vartheta}^{2}h{L}_{\textit{BB}}{C}_{Z} \end{equation}

where M tot is the total mass of the system, D is the damping coefficient, K is the stiffness of the cantilever beam, Z is the displacement of the blunt body, ρ is the density of air, υ is the wind speed, h is the characteristic dimension of the blunt body normal to the flow, and L BB is the blunt body axial length normal to the flow.…”

Section: Resultsmentioning

confidence: 99%

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A Rolling‐Bead Triboelectric Nanogenerator for Harvesting Omnidirectional Wind‐Induced Energy toward Shelter Forests Monitoring

Cao,

Su,

Sun

et al. 2023

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Shelter forests (or shelter‐belts), while crucial for climate regulation, lack monitoring systems, e.g., Internet of Things (IoT) devices, but their abundant wind energy can potentially power these devices using the trees as mounting points. To harness wind energy, an omnidirectional fluid‐induced vibration triboelectric nanogenerator (OFIV‐TENG) has been developed. The device is installed on shelter forest trees to harvest wind energy from all directions, employing a fluid‐induced vibration (FIV) mechanism (fluid‐responding structure) that can capture and use wind energy, ranging from low wind speeds (vortex vibration) to high wind speeds (galloping). The rolling‐bead triboelectric nanogenerator (TENG) can efficiently harvest energy while minimizing wear and tear. Additionally, the usage of double electrodes results in an effective surface charge density of 21.4 µC m−2, which is the highest among all reported rolling‐bead TENGs. The collected energy is utilized for temperature and humidity monitoring, providing feedback on the effect of climate regulation in shelter forests, alarming forest fires, and wireless wind speed warning. In general, this work provides a promising and rational strategy, using natural resources like trees as the supporting structures, and shows broad application prospects in efficient energy collection, wind speed warning, and environmentally friendliness.

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“…Generally, to study fluid‐responding structure, the unsteady aerodynamic is given by the flowing equation [ 32 ] (the study model is shown in Figure 2b)

\begin{equation} {\mathrm{M}}_{\textit{tot}}\Ddot{Z}+D\dot{Z}+\textit{KZ}=0.5\rho {\vartheta}^{2}h{L}_{\textit{BB}}{C}_{Z} \end{equation}

Section: Resultsmentioning

confidence: 99%

“…Generally, to study fluid-responding structure, the unsteady aerodynamic is given by the flowing equation [32] (the study model is shown in Figure 2b)…”

Section: Mechanism Of the Fluid-responding Structure And Optimization...mentioning

confidence: 99%