对一种新型海上漂浮式光伏组合式支撑结构的整体吊装入海施工技术进行研究,采用有限元软件ANSYS对支撑结构整体吊装入水的施工过程进行数值仿真,通过对比分析确定组合式支撑结构底部构件选型优化方案,对两点吊装、三点吊装和四点吊装的施工过程进行分析比选,确定组合式支撑结构的最佳吊点布置方案;着重分析吊耳位置、吊装缆绳长度等误差量对组合式支撑结构吊装过程中内力和变形等的影响规律,提出相应的误差控制指标。分析结果表明：吊点位置为长边三等分点的四点吊装工况最优;吊耳位置误差超过10 mm时,吊装缆绳内力不均匀差值超过57%,建议吊耳位置误差控制在±5 mm以内;吊装缆绳长度误差超过67.5 mm时,整体结构变形达到77 mm,结构竖向变形差超过35 mm,建议吊装缆绳长度控制在67.5 mm内。
Abstract
This paper investigates the integral lifting and launching technology for a new type of offshore floating photovoltaic （FPV） modular support structure. Based on the finite element software ANSYS, numerical simulations of the entire lifting and launching process of the support structure into the water were conducted. Through comparative analysis, an optimized selection scheme for the bottom components of the modular support structure was determined. The construction processes of two-point lifting, three-point lifting, and four-point lifting were analyzed and compared to identify the optimal lifting point arrangement for the modular support structure. The influence of errors, such as the position of lifting lugs and the length of lifting cables, on the internal forces and deformations during the lifting process of the modular support structure was emphatically analyzed, and corresponding error control indices were proposed. The analysis results indicate that the four-point lifting condition with lifting points at the trisection points of the long sides is optimal. When the position error of the lifting lugs exceeds 10 mm, the uneven difference in the internal forces of the lifting cables exceeds 57%, suggesting that the position error of the lifting lugs should be controlled within ±5 mm. When the length error of the lifting cables exceeds 67.5 mm, the overall structural deformation reaches 77 mm, and the vertical deformation difference of the structure exceeds 35 mm, recommending that the length error of the lifting cables be controlled within 67.5 mm.
关键词
光伏组件 /
海上漂浮式结构 /
误差分析 /
数值仿真 /
整体吊装 /
组合式支撑结构 /
施工分析
Key words
offshore floating structure /
error analysis /
numerical simulation /
integral lifting /
composite support structure /
construction stage analysis
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基金
国家重点研发计划（2022YFB4200700）; 天津市科技计划（23ZYQYGX00140）
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