Partitioned coupling scheme based numerical simulation platform for wind-induced vibration of tall buildings
Zheng De-qian1,2，Gu Ming2，Zhang Ai-she3
1. School of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou, China, 450001;
2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China, 200092;
3. School of Civil Engineering, Shandong Jianzhu University, Ji’nan, China, 250101
In this paper, a numerical simulation platform for fluid-structure interaction (FSI) problems of tall building structures was constructed by secondary development for commercial codes Fluent and Ansys. Conventional partitioned coupling scheme, equipped with subcycles for the fluid field calculation, was adopted in present study. The user defined functions (UDF) were used to implement mesh updating for the fluid field, and the matching & data transferring for the non-matching meshes on the coupled boundaries of the building structures. Large eddy simulation technique and parallel computation method was adopted to solve the fluid field accurately and efficiently, based on UDF and Scheme programming. The Ansys parametric design language (APDL) was programmed to solve the structural motions. Visual C++ programming was applied to mutual calling among modules of present solution procedure. Wind-induced vibrations of a square section tall building immersed in atmospheric boundary layer were numerically investigated by using present method. The simulated results were compared with those of aeroelastic model wind tunnel experiment and previous numerical simulation. By comparison of the simulated results with and without considering FSI, aerodynamic damping effect on wind-induced vibration of the building was analyzed. The results show that present method is verified to be applicable in numerically solving wind-induced aeroelastic responses of tall building structures.
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