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Aerodynamic stabilization of central stabilizers for box girder suspension bridges
Yaojun Ge,Xiaojie Zou,Yongxin Yang 한국풍공학회 2009 Wind and Structures, An International Journal (WAS Vol.12 No.4
For long-span suspension bridges with their intrinsic limit in flutter, some counter measures, for example, central stabilizers, should be adopted to improve aerodynamic stability to meet with the appropriate wind resistance requirements. The present paper introduces aerodynamic stabilization for longspan suspension bridges with box girders by using central stabilizers based on Xihoumen Bridge with the main span of 1650 m. The aerodynamic stabilization study covers experimental investigation of sectional model testing, comprehensive evaluation of three central stabilizers and theoretical analysis of stabilizing mechanism related to flutter derivatives, aerodynamic damping and degree participation.
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Aerodynamic stabilization of central stabilizers for box girder suspension bridges
Ge, Yaojun,Zou, Xiaojie,Yang, Yongxin Techno-Press 2009 Wind and Structures, An International Journal (WAS Vol.12 No.4
For long-span suspension bridges with their intrinsic limit in flutter, some counter measures, for example, central stabilizers, should be adopted to improve aerodynamic stability to meet with the appropriate wind resistance requirements. The present paper introduces aerodynamic stabilization for long-span suspension bridges with box girders by using central stabilizers based on Xihoumen Bridge with the main span of 1650 m. The aerodynamic stabilization study covers experimental investigation of sectional model testing, comprehensive evaluation of three central stabilizers and theoretical analysis of stabilizing mechanism related to flutter derivatives, aerodynamic damping and degree participation.
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Zhongyao Zhang,Xiaopeng Chen,Jiezhen Liang,Xiaojie Wei,Kaixi Deng,Jiezhong Zou,Linlin Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
The petrol-based random copolymer, e.g., aromatic-hydrocarbon resin, is widely used in industrial production,but the research about its gas–liquid two flow is far from being solved. Herein, the formation,motion, and deformation of a single bubble in six different concentrations of random copolymer solutionswere systemically investigated using high-speed photography (1000 fps), combined with digital imageprocessing technology. The departure time of the bubble first decreases and then increases, and maximumof aspect ratio and specific surface area reduce as the proportion of solute increases. The bubbledeparture time decreases and bubble size increases with viscous force increases in the case of same surfacetension. Based on force balance analysis, added mass force is one of the prime reasons to affect bubbleoscillation during the acceleration phase after bubble detachment, whereas the effect of added massforce decreases as solute increases or as the bubble reaches stability zone. Also, velocity, drag coefficientand aspect ratio of bubble were discussed in detail by dimensionless analysis. Furthermore, three newshape numerical models (based on We, Ta, and WeEo, respectively) were proposed, which allowed for satisfactorypredictions, and new correlations represent well the experimental data in a wider range of Monumbers from the mentioned literature (11.6 logMo 0.63).
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