(1 西南交通大学风工程试验研究中心，成都 610031； 2 邢台中房地产开发公司，邢台 054000)
［摘要］以秦皇岛港大型煤堆防风网为例，介绍了如何利用风洞试验的方法测定防风网的阻力系数。通过测压与测力两种试验手段，对蝶形防风网和相同透风率下的平板防风网两种模型进行了风洞试验研究。利用测压试验得到了蝶形防风网的压力损失系数，计算得到了平板网压力损失系数，二者比值可作为平板防风网和蝶形防风网阻力系数的传递条件。测力试验得到的蝶形防风网阻力系数可根据风洞有效阻塞率进行修正。通过对不同孔径下平板网测力试验结果进行分析得到了防风网孔径与阻力系数之间的线性表达式。对于两种方式得到的蝶形防风网阻力系数，综合考虑各种条件，得到了真实网型的风阻系数，可作为防风网防风安全设计的风荷载参数。
［关键词］防风网；阻力系数；风洞试验；压力损失系数；有效阻塞率
Wind tunnel test and determination of structure design parameter for windbreak
Xu Hongtao1, Li Mingshui1, Liao Haili1, Pu Huanling2(1 Wind Engineering Experimention & Research Center, Southwest Jiaotong University, Chengdu 610031, China；2 Real Estate Development Company of China in Xingtai, Xingtai 054000, China)
Abstract:Taking the large coal-pile yard windbreak at Qinhuangdao harbour as an example, how to measure drag force coefficient of windbreak by means of wind tunnel test was introduced. An experimental investigation on butterfly shape windbreak and plate windbreak with the same ventilation ratio was carried out by means of pressure measurement and force measurement. Pressure loss coefficient of butterfly shape windbreak was obtained by pressure measurement and pressure loss coefficient of plate windbreak was obtained by calculation. The ratio of them can be used to resistance transfer coefficient between butterfly shape windbreak and plate windbreak. Resistance coefficient of butterfly shape windbreak obtained by force measurement was amended by effective blocking ratio of wind-tunnel. Liner expression between windbreak aperture and resistance coefficient was concluded by analyzing the force measurement results of plate windbreaks with different aperture. The resistance coefficient of the real windbreak was obtained after considering overall conditions on drag force coefficient of butterfly shape windbreak by two means, which can be used as wind load parameter for windbreak design.
Keywords:windbreak; resistance coefficient; wind tunnel test; pressure loss coefficient; effective blocking ratio
作者简介：徐洪涛，博士，Email:xht1978@163.com。
参考文献
［1］沈熹. 防风网防尘技术在露天煤堆场的应用研究现状及对发展我国防风网防尘技术的建议［J］.交通环保：水运版,1995,16(3):22-25.
［2］刘志,王献孚. 通过防风网流动数值模拟［J］.交通环保, 1990, 11(6):1-3.
［3］李玉江,吕焕更. 在秦皇岛港8#、9#煤码头设置防风网的论证研究［J］.交通环保,1993(S1):35-37.
［4］李明水,陶奇.秦皇岛港煤堆场防风网风洞试验研究［C］//中国土木工程学会桥梁与结构工程分会风工程委员会. 第十三届全国结构风工程学术会议论文集(下册).大连:大连理工大学出版社,2007:937-941.
［5］SIMIU E, SCANLAN R H. 风对结构的作用——风工程导论［M］.刘尚培, 项海帆, 谢雾明，译. 上海:同济大学出版社, 1992.
［6］北京湍流与复杂系统国家重点实验室.防风网压力损失系数的实验研究报告［R］. 北京：北京大学，2006.
［7］伍荣林,王振羽. 风洞设计原理［M］.北京:北京航空学院出版社,1985.
［8］POPE A, HARPER J J. 低速风洞试验［M］.彭锡明，译.北京:国防工业出版社,1981.