Numerical Wind Tunnel Simulation And Fluid-Structure Interaction Analysis For Space Structure

Long span spatail structures, which are becoming lighter, greater, and more shape-complicated, brought new challenges to the Structural Wind Engineering. Relative light weight makes this kind of structure system rather sensitive to wind loads. Wind loads become one of the principal loads acting on structures in the structural design. How to calculate wind effects on the wind-sensitive structures is one of the hot issues in both theoretical research and engineering application.Based on computational fluid dynamics and computational structure dynamics, some key problems in Structural Wind Engineering are researched. An efficient iterative algorithm is presented for the numerical solution of viscous incompressible Navier-Stokes equations based on Taylor-Galerkin like split and pressure correction method. In order to confirm the properties of the algorithm, the numerical simulation on plane Poisseuille flow problem and lid-driven cavity flow problem with different Reynolds numbers are presented. The numerical results indicate that the proposed iterative version can be effectively applied to the simulation of viscous incompressible flows, and the difficulty of pressure oscillation is overcomed.The principal theories and calculation methods on the computational wind engineering are summarized. With the determination of flow field scale, boundary condition, turbulence model, calculation parameters and so on, the wind-field around a long span spatail structure is numerically simulated by means of FLUENT. Comparisons of the wind pressure between the numerical simulation and the wind tunnel test of the building model are presented in detail, which indicate that the determination of wind loads on structures by means of numerical simulation is feasible.Fluid-Structure Interaction analysis on tension membrane structures is discussed in detail. The theoretical frame and solution strategies of solving Fluid-Structure Interaction problems are set up. The numerical simulations of wind-induced dynamic response for some typical tension membrane structures are realized by means of ADINA software, and distribution rules of the wind pressure on the membrane faces are concluded. Finally, the numerical simulation of wind-induced dynamic response for a toll station of Beijing Capital Airport is carried out effectively.