柱面干煤棚风压分布特性数值模拟研究  

A Numerical Simulation and Study of the Distribution Characteristics of the Wind Pressure on the Cylindrical Dry-Coal Shed

作　　者：徐桐 李玉学 刘飞霞 

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《国防交通工程与技术》2017年第6期26-29,共4页Traffic Engineering and Technology for National Defence

摘　　要：基于计算流体力学软件ANSYS14.0-FLUENT,研究秦皇岛热电厂柱面干煤棚网壳结构在风作用下的表面风压分布。通过建筑几何模型建立、网格划分以及后处理得到相应计算模拟结果。通过控制变量法,研究不同风向角以及不同矢跨比下干煤棚壳体表面不同部位风压系数,为干煤棚结构抗风设计提供依据。研究结果表明:干煤棚的整体结构受力主要以风吸力为主,随着风向角的改变,干煤棚的风压分布会发生显著变化;干煤棚矢跨比宜为0.3~0.5,改变矢跨比对干煤棚壳体的风压分布产生一定效果但并不明显。With the help of the software of ANSYS14. 0-FLUENT for the computation of fluid mechanics the surface wind pressure of the net-shell structure of the cylindrical dry-coal shed of the coal-fired power plant in Qinhuangdao under the action of wind is studied in the paper. Through the establishment of a geometrical model grid division and the post-processing？ the simulated and calculated results are obtained. Through the variables-controlling method？ the coefficients of the wind pressure at different surface points of the cylindrical dry-coal shed from different angles of the wind direction？ and with different ratios of rise to span are studied in order to provide technical grounds for the wind-resistant design of cylindrical dry-coal shed struc-tures. The results of our research show that the force that exerts on the overall structure of the dry-coal shed is chiefly the wind suction. With the angle of the wind direction changing？ there will be remarkable changes in the distribution of the wind pressure on the dry-coal shed. It is advisable that the ratio of rise to span for the dry-coal shed should be 0. 3 -0. 5 , and Changing the ratio of rise to span has certain effect on the distribution of the wind pressure on the dry-coal shed but the effect is not so obvious.

关 键 词：柱面干煤棚 风压系数 风向角 矢跨比 

分 类 号：TU312.1[建筑科学—结构工程]