The Study On The Six-Component Coefficient In The Bridge Wind Tunnel Experiment

Recently,with the great growth of the capital economy bridge construction has developed dramatically in our country,there are more requirement in the bridge landscape.In this background,there are more river-crossing bridge types in more cities.The Liulin Bridge in Tianjin is the bridge that is originated from the creativity that a dragonfly is on a river.In the bridge,the spacial structure of its primary and subsidiary wings is very complex,,and they get the static aerodynamic situation in the wind field,and there are no actual examples referenced,so,it is necessary to carry ont the research of the six -component coefficient in this new style bridge.Firstly,in this paper,the motive and static force effect of this bridge in the wind was introduced,then the research mechod and situation of the bridge wind engineering at home and abroad was described.Secondly,the fundamental principle of numerical stimulation was introduced,then,it described the four styles of the bridge wind tunnel experiment,and the three and six aerostatic force experiment was presented in detail.then it deduced calculation formula of the straight beam model's three-component coefficient,then deduced calculation formula of the six-component coefficient of inclined and curved beam model in the indiscreate axon coordinate system and indiscreate wind axis coordinate system and local axon coordinate system.then,it mainly introduced the six aerostatic force experiment of the primary wing model segment of the Liulin bridge,then it got the six-component coefficient of the indiscreate axon coordinate system and indiscreate wind axis coordinate system of six force measuring segments.Lsatly,it introduced the numerical simulation of six-component coefficient of wind tunnel's wind field of the second segment of primary wing,and there was emphatical comparison the six-component coefficient of the numerical simulation between the effect in the six aerostatic force experiment,and checked the feasibility and reliability of the method using the CFD technology to identify the six -component coefficient,and it provided a example with the same research.