Nonlinear aerodynamic forces on bridge decks due to transverse sinusoidal fluctuation of wind

摘要：

The aerodynamic forces on bridge decks generated by transverse sinusoidal uctuation of wind are investigated by 2-dimesional lattice Boltzmann method. The aerodynamic admittance functions in traditional buffeting force model are identified. The proposed numerical method is verified by comparing the corresponding identified admittance functions of a thin at-plate with the Sears function. The longitudinal buffeting forces of all the four typical decks simulated here have multiple- frequency phenomenon. The transverse buffeting force and buffeting torque of the blunt ˇ-shape deck also have this nonlinear characteristic. A nonlinear buffeting forces model is proposed to reproduce the nonlinear aerodynamic force due to the transversely uctuating wind.

关键词： nonlinear aerodynamic forces bridge decks transverse uctuation wind lattice Boltz- mann method

作者: F.C.Cao Y.J.Ge L.D.Zhu H.F.Xiang

作者单位: State Key Lab.For Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092,China

会议类型: 国际会议

会议名称: The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2007-08-15（万方平台首次上网日期，不代表论文的发表时间）