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强风多发区柔性光伏支架抗风可靠度评估

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  • 国家科技期刊平台
  • NETL
  • NSTL
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以某实际柔性光伏支架为研究对象，建立了该光伏支架的有限元模型，并通过实测结构动力特性验证模型的正确性。采用谱表示-降维方法，生成全概率空间内的随机风速代表性样本集合。在此基础上，结合概率密度演化理论，研究了基本风速、风荷载方向及支撑索预拉力对其位移响应及抗风可靠度的影响。结果表明:随着风速的增大，柔性光伏支架抗风可靠度降低，当基本风速达到25 m/s时，结构平均整体抗风可靠度仅为0。14;提高支撑索预拉力可以显著提升结构抗风可靠度，但随着预拉力的增大，预拉力对抗风可靠度的提升作用越来越小;与背风荷载相比，柔性光伏支架在承受正风荷载时，结构抗风可靠度更低，预拉力对抗风性能的提升效果更显著。
Wind-resistance reliability assessment of flexible photovoltaic support in region prone to strong wind
Taking an actual flexible photovoltaic support as the research object,for which a finite element model was established.The accuracy of the model was validated by measuring the dynamic characteristics of the structure.Utilizing the dimension-reduction spectra representation method,a representative set of random wind speed samples within the entire probability space was generated.On this basis,in conjunction with the probability density evolution theory,the effects of basic wind speed,wind load direction,and pre-tension force in the supporting cables on its displacement response and wind-resistance reliability were studied.The re-sults indicate that as the wind speed increases,the wind-resistance reliability of the flexible photovoltaic sup-port structure decreases.When the basic wind speed reaches 25 m/s,the average overall wind-resistance relia-bility of the structure is only 0.14.Increasing the pre-tension force in the supporting cables significantly en-hances the wind-resistance reliability of the structure.However,as the pre-tension force increases,its impact on improving wind-resistance reliability diminishes.When the flexible photovoltaic support structure is subjec-ted to windward loads,it exhibits lower wind-resistance reliability compared to leeward loads.The effect of pre-tension force on improving wind-resistance performance is more pronounced in this scenario.

flexible photovoltaic supportfield test datawind-induced vibrationwind-resistant reliabilityprobability density evolution theory

周锐、王浩、徐梓栋、林禹轩、赵恺雍、刘芸

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东南大学混凝土及预应力混凝土结构教育部重点实验室,南京 211189

柔性光伏支架 实测数据 风致振动 抗风可靠度 概率密度演化理论

国家自然科学基金资助项目国家自然科学基金资助项目中国博士后科学基金资助项目江苏省"卓越博士后计划"资助项目

52208481523380112023M7305812023ZB674

2024

10.3969/j.issn.1001-0505.2024.04.006

东南大学学报(自然科学版)
东南大学

东南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.989
ISSN：1001-0505
年,卷(期)：2024.54(4)
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