【摘要】 以Iwan改进的尾流振子模型为基础,给出了剪切流中水中悬浮隧道锚索横向涡激振动的工程分析方法,分析了悬浮隧道重浮比以及剪切流特性对锚索涡激响应的影响.计算结果表明,悬浮隧道重浮比的改变,使锚索各阶模态的频锁区域分布发生变化,从而改变了结构的涡激振动响应;剪切流陡度参数的增大会使锚索涡激响应的幅值减小,若使用均匀流场代替剪切流场计算悬浮隧道锚索的涡激振动,会过高估计其响应幅值.更多还原

【Abstract】 The engineering analysis method for vortex-induced transverse vibration of submerged floating tunnel(SFT) tether is presented,based on the modified wake oscillator model.The effects of specific gravity ratio and the shear current’s characteristics on the vortex-induced vibration of tether are investigated. The calculated results show that the distribution of lock-in regions and the vortex-induced vibration of tether vary with the specific gravity ratios of SFT.The increase of the shear parameter makes the amplitude of vortex-induced vibration decrease.Furthermore,if the shear current is replaced by the uniform current to calculate the vortex-induced vibration of tether,its response amplitude may be overestimated.更多还原