【摘要】：為研究分離雙主梁間距及風(fēng)攻角對(duì)分離雙扁平箱梁三分力系數(shù)氣動(dòng)干擾效應(yīng)的影響,制作縮尺比為1∶50的分離雙扁平箱梁節(jié)段模型,進(jìn)行風(fēng)洞試驗(yàn)。測(cè)試-10°~10°風(fēng)攻角范圍內(nèi)分離雙扁平箱梁在15個(gè)不同間距(雙箱梁的凈間距D與單幅箱梁寬B之比的變化范圍為0.025~6)下的三分力系數(shù),并與單幅扁平箱梁的三分力系數(shù)進(jìn)行對(duì)比。結(jié)果表明:氣動(dòng)干擾對(duì)分離雙扁平箱梁三分力系數(shù)的影響主要表現(xiàn)為對(duì)下游箱梁的影響。對(duì)阻力系數(shù)而言,這種影響主要體現(xiàn)在D/B≤1的間距范圍,且表現(xiàn)為減小效應(yīng);對(duì)升力系數(shù)而言,這種影響主要體現(xiàn)在負(fù)向風(fēng)攻角,且表現(xiàn)為減小效應(yīng);對(duì)扭矩系數(shù)而言,這種影響主要體現(xiàn)在大風(fēng)攻角,在正向和負(fù)向大風(fēng)攻角時(shí)分別表現(xiàn)為放大效應(yīng)和減小效應(yīng)。
[Abstract]:In order to study the influence of the distance between the two beams and the angle of attack on the aerodynamic interference effect of the three-component force coefficient of the separated double-flat box girder, a model of the separated double-flat box beam with a scale ratio of 1:50 was made and the wind tunnel tests were carried out. In the range of-10 擄- 10 擄angle of attack, the three-component force coefficient of the separated double flat box girder under 15 different spacing (the ratio of the net spacing D of the double box girder to the width B of the single box girder is 0.025 脳 6) is measured, and the three-component force coefficient of the separated double flat box girder is measured in the range of-10 擄to 10 擄. The three-component force coefficient of the flat box girder is compared with that of the single flat box girder. The results show that the influence of aerodynamic interference on the three-component force coefficient of the separated double flat box girder is mainly the influence on the downstream box girder. As far as the drag coefficient is concerned, the effect is mainly reflected in the distance between D _ (B) 鈮，

本文編號(hào)：2449833