Parametric study on flutter performance of three-cable-supported flexible photovoltaic support structure

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-05-01 Epub Date: 2025-01-17 DOI:10.1016/j.tws.2025.112975

Rui Zhou, Zidong Xu, Hao Wang

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Abstract

Three-cable-supported flexible photovoltaic (PV) systems have broad application prospects due to their large span, economic efficiency, and strong adaptability to various terrains. Due to the low natural frequency of this structure and its cross-section being similar to that of a thin flat plate, it is prone to flutter instability. This work takes a typical three-cable-supported flexible PV support structure as an example and establishes a flutter analysis finite element model that considers aerodynamic characteristics. The flutter analysis is conducted using the full-order method, and the effects of key design parameters on the flutter critical wind speed (FCWS) are investigated. The design parameters include the pretension in cables, the height of triangular brackets, the mass and stiffness of PV modules, the span, and the damping ratio. Results indicate that the most effective method to increase the FCWS is to reduce the span. Increasing the pretension in the upper load-bearing cables significantly enhances the FCWS, while the pretension in the lower load-bearing cables has a limited effect on the FCWS. Increasing the height of the triangular brackets and reducing the mass of the PV modules can improve the flutter stability of the flexible PV support structure, while the stiffness of the PV modules has little impact on the FCWS. The damping ratio enhances the FCWS, demonstrating a linear correlation. The research findings can serve as a reference for future wind-resistant design of flexible PV support structures.

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三缆支撑柔性光伏支架结构的扑动性能参数研究

三缆支撑柔性光伏系统具有跨度大、经济高效、对各种地形适应性强等优点，具有广阔的应用前景。由于该结构固有频率较低，且其截面类似于薄板，易发生颤振失稳。本文以典型的三索支撑柔性PV支撑结构为例，建立了考虑气动特性的颤振分析有限元模型。采用全阶方法进行了颤振分析，研究了关键设计参数对颤振临界风速的影响。设计参数包括电缆预张力、三角支架高度、光伏组件质量和刚度、跨度、阻尼比等。结果表明，减小跨距是提高FCWS最有效的方法。增加上部承重索的预紧力可显著增强FCWS，而增加下部承重索的预紧力对FCWS的影响有限。增加三角支架的高度和减小光伏组件的质量可以提高柔性光伏支撑结构的颤振稳定性，而光伏组件的刚度对柔性光伏支撑结构的颤振稳定性影响不大。阻尼比增强了FCWS，表现出线性相关。研究结果可为今后柔性光伏支撑结构的抗风设计提供参考。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.