人工粘性方法用于复杂大跨屋面的平均风压模拟  

ARTIFICIAL VISCOSITY TECHNIQUES FOR THE PREDICTION OF MEAN PRESSURES ON COMPLEX LARGE-SPAN ROOFS

作　　者：汪丛军[1] 黄本才[1] 张昕[2] 王国俭[2] 周健[2] 

机构地区：[1]同济大学航空航天与力学学院,上海200092 [2]上海现代建筑设计(集团)有限公司,上海200041

出　　处：《工程力学》2008年第5期97-101,共5页Engineering Mechanics

摘　　要：在复杂外形大跨度屋面平均风压的数值模拟中,数值计算的稳定性是计算风工程中一个很关键的问题,它往往决定了数值模拟的精度。该文主要以上海浦东国际机场复杂大跨度屋面平均风压数值模拟为例,采用人工粘性方法和通常的低阶迎风格式两种途径,模拟大跨度屋面上的平均风压并与风洞实验数据对比分析,得到人工粘性方法与风洞实验结果更为一致,人工粘性方法是提高复杂大跨度屋面平均风压数值模拟精度的一条有效途径。Numerical stability is one of the most important factors in Computational Wind Engineering. It has great effects on the accuracy of numerical prediction of mean wind pressures on the complex large-span roofs. Two different ways are used to stabilize the numerical oscillations in predicting the mean pressures on large-span roofs： artificial viscosity techniques and low-order upwind scheme. By comparing these numerical results with wind tunnel experiment data, it could be found the results from artificial viscosity techniques agree better with experimental data. So artificial viscosity technique could be an effective way to improve the accuracy in predicting mean pressures on the complex large-span roofs.

关 键 词：风工程 计算流体动力学 人工粘性 大跨度屋面 湍流模型 平均风压 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程] TU312.1[建筑科学—结构工程]