单坡屋盖风致积雪数值模拟研究  

Numerical simulation of snow drifting on shed roofs

作　　者：李跃[1] 吕金炭 袁行飞[1] 

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310058 [2]福建荣盛钢结构实业有限公司,福建泉州362801

出　　处：《空间结构》2014年第4期67-73,共7页Spatial Structures

基　　金：国家科技支撑计划课题(2012BAJ07B00)

摘　　要：采用单方程雪相模型,利用CFD软件FLUENT及其UDF二次开发接口编程对单坡屋盖结构进行风致积雪数值模拟.通过不同跨度、不同风速、不同倾角的单坡屋盖模型研究屋盖表面积雪侵蚀沉积量随风速及倾角变化的关系,并拟合近似公式.利用本文建议的积雪分布系数公式得出某工况下单坡屋盖表面积雪分布,并与各规范值进行对比.本文结果显示单坡屋盖表面积雪不均匀分布较为严重.The snow drifting on shed roofs is simulated by the single-equation model in CFD software FLU- ENT with UDF program. The relation between the erosion or deposition amount of snow, wind velocity, and the dip angle of the roof is studied respectively by simulating the snow drifting on shed roofs in differ- ent span, wind velocity and dip angle. A fitting formula is suggested to estimate the relationship. The snow distribution on shed roof in some condition is calculated by the formula of snow distribution coeffi- cient suggested in this paper and is compared with those provided by different codes. The results show that the snow on shed roofs has a terrible uneven distribution.

关 键 词：单坡屋盖 风致积雪 侵蚀沉积量 积雪分布系数 

分 类 号：TU312.1[建筑科学—结构工程]