不同断面型式悬浮隧道管段波动特性实验研究
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摘要
水中悬浮隧道(Submerged floating tunnel,简称SFT)是世界上目前唯一还没有实践过的海洋交通结构。SFT的波浪荷载作用评价对隧道结构设计十分重要。通过在二维波浪水槽中的物理模型实验,研究了3种不同断面型式悬浮隧道结构在不同波高和周期下的不规则波作用响应。实验结果表明:(1)相比圆形和多边形断面,椭圆形断面在周期内明显出现了多个局部峰值,且随着波高的增加,局部峰值的个数也随之增多,说明高宽比较小的椭圆形断面旋转力矩发生了作用。(2)通过获得的SFT断面周向压强对SFT断面的垂向和水平向波浪力进行了估算。(3) 3种SFT断面出现最大最小压强的位置是一致的,但3种SFT断面的垂向波浪力均大于水平波浪力,结构设计时应重点关注垂向波浪力。根据垂向波浪力与水平波浪力幅值差变化比较,椭圆形和多边形受波高变化的敏感性比圆形更为显著。
Submerged floating tunnel( SFT) is a unique marine structure whose actual realization has yet be made in the world. Assessment of hydrodynamic performance of SFT under wave loading is one of important factor in the design of SFT structure. The effect of different wave heights and periods on the structure of three kinds of cross section tunnel structures was studied by the physical model experiment in a two-dimensional wave flume.Experimental results show that,( 1) compared to circular and polygonal sections,there are obvious local peaks in the elliptical section in the period,and with the increase of wave height,the number of local peaks also increases,this shows that the rotating moment of the elliptical section with high width and small width has an effect.( 2) Through the obtained SFT section circumferential pressure the vertical and horizontal wave forces on the SFT section are estimated.( 3) The position of the maximum and minimum pressure in the three SFT sections is the same,but the vertical wave force is larger than the horizontal wave force,the vertical force should be paid more attention to in structural design.According to the amplitude difference of vertical wave force and horizontal wave force,the sensitivity of ellipse and polygon to wave height change is more obvious than that of circular shape.
Submerged floating tunnel( SFT) is a unique marine structure whose actual realization has yet be made in the world. Assessment of hydrodynamic performance of SFT under wave loading is one of important factor in the design of SFT structure. The effect of different wave heights and periods on the structure of three kinds of cross section tunnel structures was studied by the physical model experiment in a two-dimensional wave flume.Experimental results show that,( 1) compared to circular and polygonal sections,there are obvious local peaks in the elliptical section in the period,and with the increase of wave height,the number of local peaks also increases,this shows that the rotating moment of the elliptical section with high width and small width has an effect.( 2) Through the obtained SFT section circumferential pressure the vertical and horizontal wave forces on the SFT section are estimated.( 3) The position of the maximum and minimum pressure in the three SFT sections is the same,but the vertical wave force is larger than the horizontal wave force,the vertical force should be paid more attention to in structural design.According to the amplitude difference of vertical wave force and horizontal wave force,the sensitivity of ellipse and polygon to wave height change is more obvious than that of circular shape.
引文
[1]麦继婷,关宝树.用Morison方程计算分析悬浮隧道所受波浪力初探[J].石家庄铁道学院学报,2003,16(3):1-4.(Mai Jiting,Guan Baoshu.Preliminary study on calculation and analysis of wave forces on submerged floating tunnel by Morison equation[J].Journal of Shijiazhuang Railway College,2003,16(3):1-4.(in Chinese))
[2]Kunisu H.Evaluation of wave force acting on Submerged Floating Tunnels[J].Procedia Engineering,2010,4(6):99-105.
[3]Hong Y,Ge F.Dynamic response and structural integrity of submerged floating tunnel due to hydrodynamic load and accidental load[J].Procedia Engineering,2010,4:35-50.
[4]Lu W,Ge F,Wang L,et al.On the slack phenomena and snap force in tethers of submerged floating tunnels under wave conditions[J].Marine Structures,2011,24(4):358-376.
[5]王广地,周晓军,高波.水下悬浮隧道波流荷载分析研究[J].铁道建筑,2007(10):48-51.(Wang Guangdi,Zhou Xiaojun,Gao Bo.Wave-current load analysis of underwater suspension tunnel[J].Railway Architecture,2007(10):48-51.(in Chinese))
[6]秦银刚,周晓军.张力腿型悬浮隧道涡激响应影响因素分析[J].铁道工程学报,2009,26(1):77-81.(Qin Yingang,Zhou Xiaojun.Analysis of influencing factors on eddy-induced response of tension leg suspension tunnel[J].Journal of Railway Engineering,2009,26(1):77-81.(in Chinese))
[7]Venkataramana K,Yoshihara S,Toyota S,et al.Current-induced vibrations of submerged floating tunnels[A]//Proceedings of the Six International Offshore and Polar Engineering Conference[C].Los Angels,USA,1996:111-118.
[8]Kunisu H,Mizuno S,Mizuno Y,et al.Study on submerged floating tunnel characteristics under the wave condition[A]//International Society of Offshore and Polar Engineers[C].1994:99-105.
[9]惠磊,葛斐,洪友士.水中悬浮隧道在冲击载荷作用下的计算模型与数值模拟[J].工程力学,2008,25(2):209-213.(Hui Lei,Ge Fei,Hong Youshi.Computational model and numerical simulation of underwater suspension tunnel under impact load[J].Engineering Mechanics,2008,25(2):209-213.(in Chinese))
[10]Oh S H,Park W S,Jang S C,et al.Physical experiments on the hydrodynamic response of submerged floating tunnel against the wave action[J].Hasanuddin University Press,2013(10):582-587.
[11]Seo S I,Sagong M,Son S W.Global response of submerged floating tunnel against underwater explosion[J].KSCE Journal of Civil Engineering,2015,19(7):2029-2034.
[12]吴梦军,李科.大型水下隧道实验技术与系统研发[J].地下空间与工程学报,2018,14(6):1701-1708.(Wu Mengjun,Li Ke.Development of large scale experimental technique and system for underwater tunnel[J].Chinese Journal of Underground Space and Engineering,2018,14(6):1701-1708.(in Chinese))
[13]陈仁东.妈湾跨海通道前海湾隧道工法方案比选[J].地下空间与工程学报,2017,13(5):1319-1328.(Chen Rendong.Comparison and selection for construction method of qianhaiwan tunnel on mawan cross passage[J].Chinese Journal of Underground Space and Engineering,2017,13(5):1319-1328.(in Chinese))
[2]Kunisu H.Evaluation of wave force acting on Submerged Floating Tunnels[J].Procedia Engineering,2010,4(6):99-105.
[3]Hong Y,Ge F.Dynamic response and structural integrity of submerged floating tunnel due to hydrodynamic load and accidental load[J].Procedia Engineering,2010,4:35-50.
[4]Lu W,Ge F,Wang L,et al.On the slack phenomena and snap force in tethers of submerged floating tunnels under wave conditions[J].Marine Structures,2011,24(4):358-376.
[5]王广地,周晓军,高波.水下悬浮隧道波流荷载分析研究[J].铁道建筑,2007(10):48-51.(Wang Guangdi,Zhou Xiaojun,Gao Bo.Wave-current load analysis of underwater suspension tunnel[J].Railway Architecture,2007(10):48-51.(in Chinese))
[6]秦银刚,周晓军.张力腿型悬浮隧道涡激响应影响因素分析[J].铁道工程学报,2009,26(1):77-81.(Qin Yingang,Zhou Xiaojun.Analysis of influencing factors on eddy-induced response of tension leg suspension tunnel[J].Journal of Railway Engineering,2009,26(1):77-81.(in Chinese))
[7]Venkataramana K,Yoshihara S,Toyota S,et al.Current-induced vibrations of submerged floating tunnels[A]//Proceedings of the Six International Offshore and Polar Engineering Conference[C].Los Angels,USA,1996:111-118.
[8]Kunisu H,Mizuno S,Mizuno Y,et al.Study on submerged floating tunnel characteristics under the wave condition[A]//International Society of Offshore and Polar Engineers[C].1994:99-105.
[9]惠磊,葛斐,洪友士.水中悬浮隧道在冲击载荷作用下的计算模型与数值模拟[J].工程力学,2008,25(2):209-213.(Hui Lei,Ge Fei,Hong Youshi.Computational model and numerical simulation of underwater suspension tunnel under impact load[J].Engineering Mechanics,2008,25(2):209-213.(in Chinese))
[10]Oh S H,Park W S,Jang S C,et al.Physical experiments on the hydrodynamic response of submerged floating tunnel against the wave action[J].Hasanuddin University Press,2013(10):582-587.
[11]Seo S I,Sagong M,Son S W.Global response of submerged floating tunnel against underwater explosion[J].KSCE Journal of Civil Engineering,2015,19(7):2029-2034.
[12]吴梦军,李科.大型水下隧道实验技术与系统研发[J].地下空间与工程学报,2018,14(6):1701-1708.(Wu Mengjun,Li Ke.Development of large scale experimental technique and system for underwater tunnel[J].Chinese Journal of Underground Space and Engineering,2018,14(6):1701-1708.(in Chinese))
[13]陈仁东.妈湾跨海通道前海湾隧道工法方案比选[J].地下空间与工程学报,2017,13(5):1319-1328.(Chen Rendong.Comparison and selection for construction method of qianhaiwan tunnel on mawan cross passage[J].Chinese Journal of Underground Space and Engineering,2017,13(5):1319-1328.(in Chinese))