【摘要】 文章采用Morison公式,考虑水体对结构动力响应的影响,建立地震作用下水中悬浮隧道锚索的非线性动力方程;运用振型分解法求解结构动力方程系列解,等效线性化处理动力方程非线性项,采用虚拟激励模拟随机地震输入,数值模拟随机地震下水中悬浮隧道锚索的动力响应,给出锚索的位移和速度功率谱;通过位移和速度功率谱分析可得随机地震激励作用下水中悬浮隧道锚索的动力行为。更多还原

【Abstract】 Nonlinear dynamic equation of anchor cable of submerged floating tunnel(SFT) was established,where Morison formula was applied to taking the influence of water upon structure dynamic response into consideration.The series solutions of structure dynamic equation were obtained based on modal decomposition method,and the nonlinear terms of dynamic equation were simplified by equivalent linearization method.The dynamic response of SFT’s anchor cable to random seismic excitation was simulated by virtual and motivating method,and the displacement and velocity power spectrums of anchor cable were presented.The dynamic behavior of SFT’s anchor cable under random seismic excitation was achieved by analyzing the displacement and the velocity power spectra.更多还原