后屋面水平投影长度对日光温室性能的研究

为了研究后屋面水平投影长度对节能型日光温室性能的影响，以北方高纬度日光温室为研究对象，分析了哈尔滨日光温室合理的前屋面角。在确保日光温室采光性能的基础上，应用ANSYS有限元软件对温室结构进行了三维分析，讨论了后屋面水平投影长度对日光温室结构安全性能的影响。结果表明，对于北方高纬度地区常用的脊跨比为1：2的日光温室，当后屋面水平投影长与脊高之比为24％～25％时，日光温室结构比较合理。前屋面角大于哈尔滨最小前屋面角29．2°，有利于日光温室的采光和积雪的滑落，钢结构承栽能力比较好，是适合课题组即将建设的北方高纬度地区的日光温室结构。

Different Roof Horizontal Projection Length on the Performance of Greenhouse

In order to study the effects of the horizontal projection length of the roof on the energy - saving solar greenhouse performance, with the greenhouse in the northern high latitudes as the study, based on the analysis of the former Harbin reasonable greenhouse roof angle to ensure that greenhouse lighting performance, the three - dimensional analysis was conducted on greenhouse structure with application of ANSYS soft- ware, the influence to the structural safety performance of greenhouse were studied. The results show that ： for the northern high latitudes common ridge span ratio of 1 ： 2 greenhouse, when the rear horizontal projection of the roof ridge length and height ratio of 24% to 25% , the greenhouse structure is more reasonable. Front roof angle relatively large is conducive to greenhouse lighting and snow fall, while steel has better carrying ca- pacity that is suitable for the construction of a greenhouse in northern high latitudes area.