Studying the wind-induced vibrations of a traffic signal structure through long term health monitoring

Tsai, Li-Wei; Alipour, Alice

doi:10.1016/j.engstruct.2021.112837

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…It is planned to carry out dynamic wind tunnel tests to investigate the dynamic response of the cylinder, using a spring support system to describe the vortex shedding response [47][48][49][50] and possible galloping phenomena [51,52]. Such studies are fundamental for reliable assessment of the resistance and fatigue behaviour of many structural types [53][54][55]. In addition, the aerodynamic loading of non-stationary winds, such as thunderstorms, can be studied [56][57][58] introducing in the experiment typical effects induced by thunderstorms outflows [59].…”

Section: Discussionmentioning

confidence: 99%

Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion

Orlando

Pagnini

Repetto

2023

Engineering Structures

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Section: Discussionmentioning

confidence: 99%

Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion

Orlando

Pagnini

Repetto

2023

Engineering Structures

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“…As a result, big money is spent spent to manufacture highly reliable bearings, blades, and other structural parts. As a result, for small-scale wind energy harvesting technology, more and more researchers are studying a wind-induced vibration structure [ 14 , 15 , 16 ]. Namely, there is a trend of transferring wind energy to vibration energy first, and then converting vibration energy to electrical energy through the mechatronic conversion element [ 17 ].…”

Section: Principles Of the Novel Wind–solar Hybrid Energy Harvesting ...mentioning

confidence: 99%

A Wind-Solar Hybrid Energy Harvesting Approach Based on Wind-Induced Vibration Structure Applied in Smart Agriculture

Xia¹,

Tao

et al. 2022

Micromachines

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Solar energy harvesting devices are widely used in smart agriculture nowadays. However, when lighting conditions are weak, such as through the night or on cloudy days, efficiency decays a lot. Additionally, as time goes by, more and more dust and bird droppings accumulate on the panel, which decreases the performance significantly. This paper aims to overcome the disadvantages mentioned above, and a novel wind–solar hybrid energy harvesting approach is proposed with an oscillation-induced dust-cleaning function. A wind-induced vibration device is specially designed in order to generate electrical energy and/or clean the photovoltaic panel. While in good lighting conditions, the device could keep the panel in a stable state and optimize the photovoltaic power generation efficiency. Such a hybrid energy harvesting approach is called a “suppress vibration and fill vacancy” algorithm. The experimental platform of the proposed device is introduced, and both experimental and simulation results are attained, which prove that using this device, we could realize multiple purposes at the same time.

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“…The excessive displacement response of a cantilevered mast arm traffic support structure could be up to 48 inches under steadystate winds with speeds ranging from 10 to 35 mph [3]. Large amplitude vibrations result in repeated load stress cycles, which reduce the fatigue life of these structures [4]. Fatigue failures of cantilevered traffic signal structures have occurred in many locations and have become a prominent concern across the United States.…”

Section: Introductionmentioning

confidence: 99%

“…Thirty states reported having excessive vibrations or fatigue cracking of sign, signal, or light support structures under a survey by The National Cooperative Highway Research Program. Vibration problems of traffic signal structures induced by vortex shedding, galloping, natural wind gusts, and truck-induced gusts have been extensively studied in the past decades using different means including long-term full-scale measurements [4,5], wind tunnel experiments [6], and numerical as well as analytical modeling [7].…”

Section: Introductionmentioning

confidence: 99%

Modeling of wind-induced vibration control and energy harvesting of traffic signal structures

Qian

Ragai

Nie

et al. 2023

Active and Passive Smart Structures and Integrated Systems XVII

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Traffic signal support structures are slender, highly flexible, and lightly damped. Therefore, they are particularly susceptible to wind-induced vibrations, which result in repeated load stresses and fatigue failures. A tuned energy harvesting inerter damper (TEHID)is proposed to reduce wind-induced vibrations of traffic signal support structures and convert the wasted vibration energy into electricity. The TEHID creates a large inertia mass by converting the low-frequency vibration motion of the light head to a high-speed rotation thereby eliminating the need for a large physical mass and accommodation space required by the conventional tuned mass damper (TMD). This paper focuses on the nonlinear dynamics modeling of the wind-induced vibration control and energy harvesting system for traffic signal support structures. The traffic signal structure is modeled as an L-shaped beam with multi-segments and the TEHID is simplified as a three-element device consisting of a spring, a damper, and an inerter. The nonlinear equations and the boundary conditions governing the motion of the integrated vibration control and energy harvesting system are derived from the energy method and presented herein. Modal analysis is conducted and the derived natural frequencies and mode shapes are compared with the finite element simulation results to validate the analytical model.

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Studying the wind-induced vibrations of a traffic signal structure through long term health monitoring

Cited by 9 publications

References 13 publications

Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion

Wind tunnel tests of a hexadecagonal cylinder with imperfections and ancillaries: aerodynamic characterization and technical discussion

A Wind-Solar Hybrid Energy Harvesting Approach Based on Wind-Induced Vibration Structure Applied in Smart Agriculture

Modeling of wind-induced vibration control and energy harvesting of traffic signal structures

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