Numerical Simulation of Aeroelastic Responses of A Square Section Tall Building
In order to study the mechanism of aeroelastic response of tall building structures,windinduced vibration of a square section tall building with 1:6 width to height aspect ratio in atmospheric boundary layer was numerically simulated,employing secondary development for commercial codes Fluent and Ansys.Conventional partitioned coupling scheme,equipped with subcycles for the fluid field calculation,was adopted in the present study.Large eddy simulation technique was used to solve the fluid field,considering inflow turbulence.The structural motions were solved by Ansys parametric design language programming.The user defined functions were used to implement mesh updating for the fluid field,and matching & data transferring for the non-matching meshes on the coupled boundaries.Firstly,the simulated wind-induced along & across vibration responses of the building were verified by comparison with aeroelastic model wind tunnel experimental results.The along-wind buffeting and the across-wind vortex-excited vibration were both captured.With the increase of the reduced velocity,the across-wind vortex-excited vibration becomes dominant,transferring from the beat-phenomena to the vortex-excited resonance.Present method is verified to be applicable in numerically solving wind-induced aeroelastic responses for tall building structures.Secondly,the aerodynamic damping effect on wind-induced vibration of the building was analyzed by comparison of the simulated results with and without considering fluid structure interaction.It shows that the aerodynamic damping is favorable to reduce wind-induced responses of the building,when the reduced wind velocity is low.However,the aerodynamic damping effect cannot be neglected when the transverse vortexexcited resonance occurs.
ZHENG Deqian
Transportation Engineering College of Civil Engineering
国内会议
郑州
英文
181-193
2019-10-21（万方平台首次上网日期，不代表论文的发表时间）