单层索系柔性光伏支架结构设计参数分析
李振兴 , 翟建强 , 吴彩霞 , 王艳珺 , 张澎 , 蒋姝柠 , 郭昭胜
太原理工大学学报 ›› 2026, Vol. 57 ›› Issue (3) : 649 -659.
单层索系柔性光伏支架结构设计参数分析
Design Parameters Analysis of Single-Layer Cable Flexible Photovoltaic Support Structure
目的 研究单层索系柔性光伏支架结构受力及变形的问题,为单层索系柔性光伏支架设计施工提供理论参考。 方法 通过线性滤波法模拟脉动风时程,利用有限元软件分别对不同设计参数结构进行脉动风动力时程分析和等效静力分析,其中对比分析了索初始预应力、索跨度、高低跨倾角对结构风振响应的影响,并计算了其风振系数;等效静力分析在动力分析的基础上进行了更为细致的参数对比分析。 结果 分析结果表明:施加索初始预应力极大增加了结构刚度,改变了结构动力特性;索跨度为影响结构风振系数计算值的主要因素;单层索系柔性光伏支架结构跨度在10~30 m时,建议结构正风向风振系数取1.58~1.77,负风向风振系数取1.68~1.81。减小跨度是控制索挠度的最有效方式,但是跨度过小会使钢立柱数量过多,造成钢材浪费,建议跨度选定在15~20 m;温度对结构整体变形存在一定影响,低温能够减小索竖向变形;改变支座倾角对柔性光伏结构的索挠度、索力和支座水平支反力影响不大,但对中柱和端柱竖向支反力影响明显,进行结构地基基础设计时应特别注意。
Purposes In order to study the stress and deformation of single-layer cable flexible photovoltaic bracket structure, the linear filter method is used to simulate the pulsating wind time history, and the finite element software is used to conduct the pulsating wind dynamic time history and equivalent static analyses of the structure with different design parameters. Methods The effects of initial prestress of the cable, span of the cable, and angles of the high and low span on the wind vibration response of the structure were analyzed. The wind vibration coefficient was calculated. On the basis of dynamic analysis, a more detailed parameter comparison analysis was made for the equivalent static analysis. Results The analysis results show that the application of initial prestress greatly increases the structural stiffness and changes the dynamic characteristics of the structure. Cable span is the main factor affecting the calculation value of structural wind vibration coefficient. When the span of single-layer cable flexible photovoltaic support structure is 10~30 m, the wind vibration coefficient of the structure is recommended to be 1.58~1.77 in the positive direction and 1.68~1.81 in the negative direction. Reducing the span is the most effective way to control the cable deflection, but too small span will make the number of steel columns too much, resulting in steel waste. Thus, it is recommended that the span is selected at 15~20 m. Temperature has a certain effect on the overall deformation of the structure, and low temperature can reduce the vertical deformation of the cable. Changing the angle of the support has little effect on the cable deflection, cable force, and horizontal support reaction of the flexible photovoltaic structure, but it has obvious effect on the vertical support reaction of the middle column and the end column. Special attention should be paid to the design of the structural foundation.
| [1] |
杜航.大跨度柔性光伏支架结构的风致效应及其控制[D].杭州:浙江大学,2022. |
| [2] |
王雨.光伏组件柔性支架技术方案[J].太阳能,2018(3):37-40. |
| [3] |
|
| [4] |
杨政,贺拥军,全勇.单层悬索光伏支架静力分析及简化计算方法[J].科学技术与工程,2022,22(21):9252-9259. |
| [5] |
|
| [6] |
宋薏铭,袁焕鑫,杜新喜, |
| [7] |
|
| [8] |
杨光,左得奇,侯克让, |
| [9] |
|
| [10] |
周杰,杜金娥,徐佳骆, |
| [11] |
谢丹,范军.预应力柔性光伏支承体系风振分析[J].建筑结构,2021,51(21):15-18. |
| [12] |
|
| [13] |
建筑结构荷载规范:GB50009-2012 [S].北京:中国建筑工业出版社,2012. |
| [14] |
陆锋,楼文娟,孙炳楠 .大跨度平屋面的风振响应及风振系数[J].工程力学,2002,19(2):52-57. |
| [15] |
|
| [16] |
刘志超.带弹性抗风索的柔性光伏支架的受力性能[D].南京:东南大学,2021. |
| [17] |
TCPIA 0047—2022《光伏柔性支架设计与安装技术导则》 [S]. |
/
| 〈 |
|
〉 |