- 摘 要
-
1 同濟大學(xué)土木工程防災(zāi)國家重點實驗室， 上海 200092；
2 中冶賽迪工程技術(shù)股份有限公司， 重慶 401122）
［摘要］通過剛性模型測壓風(fēng)洞試驗測量了鋼鐵廠用于運輸?shù)V石等原材料的膠帶運輸機機罩在不同傾角工況下的表面風(fēng)壓時程，研究了內(nèi)部節(jié)段和端部節(jié)段的平均風(fēng)壓、脈動風(fēng)壓和最不利風(fēng)壓分布規(guī)律。試驗結(jié)果表明，內(nèi)部節(jié)段和端部節(jié)段的平均風(fēng)壓和脈動風(fēng)壓分布具有一定的相似性。風(fēng)向角對模型平均風(fēng)壓和脈動風(fēng)壓分布具有比較顯著的影響，機罩傾角對其影響較小。端部節(jié)段的開口效應(yīng)和三維繞流特性使其平均風(fēng)壓、脈動風(fēng)壓和最不利風(fēng)壓分布較內(nèi)部節(jié)段具有顯著的差異。端部節(jié)段的最不利風(fēng)壓系數(shù)較內(nèi)部節(jié)段顯著不利，最不利正負風(fēng)壓系數(shù)最大值分別是內(nèi)部節(jié)段相應(yīng)值的1.5倍和2.7倍。
［關(guān)鍵詞］膠帶運輸機機罩； 細長柱面結(jié)構(gòu)； 風(fēng)洞試驗； 風(fēng)壓系數(shù)
中圖分類號： TU352 文獻標(biāo)識碼： A文章編號： 1002-848X(2016)S1-0981-05
Wind tunnel test for wind pressure characteristics on hood of belt conveyor
Zhou Shuyi1, Quan Yong1, Gu Ming1, Zhu Xinfa2
(1 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;
2 CISDI ENGINEERING Co., Ltd., Chongqing 401122, China)
Abstract: Based on the wind tunnel test for the hood of belt conveyor, which is used to convey ores for steel plants, wind pressure measurements were carried out on various hood inclination angles. Mean and RMS pressure as well as the most unfavorable pressure distributions on both middle section and end section were studied. It was found that the mean and RMS pressure distributions show some similarities. Wind direction has significant effect on mean and RMS pressure distributions, and hood inclination angle has little effect on them. The mean and RMS pressure as well as the most unfavorable pressure distributions on end section are obviously different from middle section, as a result of end section′s aperture effect and its three dimensional flow characteristic. The former′s most unfavorable wind pressure coefficients are much more unfavorable than the latter′s. The most unfavorable positive and negative wind pressure coefficients on end section are 1.5 times and 2.7 times as larger as on middle section, respectively.
Keywords: hood of belt conveyor; slender cylindrical structure; wind tunnel test; wind pressure coefficient
作者簡介： 周述燚，碩士，Email: zhoushuyicq@126.com；全涌，教授，博士生導(dǎo)師，Email:quanyong@#edu.cn。
*國家自然科學(xué)基金面上項目（51278367），國家自然科學(xué)基金集成項目（91215302），土木工程防災(zāi)國家重點實驗室自主研究課題基金（SLDRCE15-B-03）。
