【摘要】 海上大跨度柔性光伏支架的振动特性受多种因素影响，传统单层悬索结构难以满足工程需求。因此提出一种跨径60m新型正反拱光伏结构体系，该体系由光伏板、组件承重索、下部承重索(反拱)、上部稳定索(正拱)、索间撑杆、横梁、立柱及边锚等构件组成。对新体系进行了整体位移、局部构件节点静力及动力特性分析。结果表明：在风压作用下，下部承重索张紧并承担主要载荷，起控制作用，而上部稳定索卸载；在风吸作用下，上部稳定索张紧并承担主要载荷，下部承重索卸载。边立柱主要承受X向侧向力，发挥横向抗弯作用；中立柱主要承受Y、Z向侧向力，发挥竖向抗压和纵向抗弯作用。节点力随荷载、倾角和跨度的增大而增大，其中边立柱的跨径方向分力F_x受影响最大，中立柱的竖向分力F_y和纵向分力F_z受影响显著。动力特性分析表明，正反拱结构的竖向刚度和扭转刚度较小，在风荷载下易产生较大动力响应。因此，建议增设纵向稳定索及稳定立柱，以提高结构整体刚度和阻尼比，增强抗风能力。更多还原

【Abstract】 The vibration characteristics of large-span flexible photovoltaic supports in marine environments are influenced by multiple factors, and traditional single-layer cable-suspended structures struggle to meet engineering requirements. A novel positive-negative arch flexible photovoltaic structural system was proposed, consisting of flexible photovoltaic panels, component load-bearing cables, lower load-bearing cables(negative arch), upper stabilizing cables(positive arch), inter-cable struts, beams, columns and edge anchors. Static and dynamic characteristic analyses were conducted on the displacement and local component nodes of the new system. The results indicate that under wind pressure, the lower load-bearing cable tightens and bears the primary load, playing a controlling role, while the upper stabilizing cable unloads. Conversely, under wind suction, the upper stabilizing cable tightens and bears the primary load, while the lower load-bearing cable unloads. Edge columns primarily withstand lateral forces in the X-direction, providing transverse bending resistance, whereas central columns mainly withstand lateral forces in the Y-direction and Z-direction, offering vertical compression and longitudinal bending resistance. Nodal forces increase with load, inclination angle and span, with the edge columns’ span-wise component force F_x being the most affected, and the central columns′ vertical component force F_y and longitudinal component force F_z being significantly influenced. Dynamic characteristic analysis reveals that the positive-negative arch structure exhibits low vertical and torsional stiffness, leading to substantial dynamic responses under wind loads. Therefore, it is recommended to incorporate longitudinal stabilizing cables and stabilizing columns to enhance the overall stiffness and damping ratio, thereby improving wind resistance.更多还原