摘要
为了研究西堠门悬索桥在施工阶段和完工通车时所受强风作用的影响,利用粘性不可压缩的N-S(Navier-Stokes)方程和RNG(renormalization group)κ-ε两方程湍流模型对大桥二维钢箱梁在强风作用下进行了精确的数值模拟,得到了钢箱梁在各工况下的受力随时间的变化以及阻力的频率和最值等。模拟结果表明,钢箱梁在无横向连接的施工阶段受到的阻力远大于有横向连接时的受力,所有工况中钢箱梁的受力都是周期变化的,这与风场诱发涡的脱落周期是一致的。
In order to study the effect of strong wind on West Houmen long span suspension bridge both under construction and after completion,the precise numerical simulations towards two-dimensional steel box girders of West Houmen bridge were carried out using viscous and incompressed N-S（Navier-Stokes） equation and the turbulence model of RNG（renormalization group） κ-ε two equations.The force variety along with time,the frequency and the maximum resistance were gained under certain conditions.The results indicate that the resistance of construction without transverse juncture is much larger than that with transverse juncture,and that the resistance of steel box girders under any condition periodically varies,which is consistent with the periods of vortex shedding caused by the wind field.
出处
《解放军理工大学学报（自然科学版）》
EI
2008年第1期77-80,共4页
Journal of PLA University of Science and Technology(Natural Science Edition)
