【摘要】 将张力腿定位的水中悬浮隧道结构简化为弹性简支梁和弹性支撑刚性梁的叠加,基于Euler(欧拉)梁理论给出悬浮隧道管段受迫振动时的运动方程,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,数值模拟平稳随机地震下水中悬浮隧道管体的动力响应,给出管段的位移功率谱.通过位移功率谱分析表明:随着消能连接装置阻尼系数和张力腿弹簧系数的增大,管段的动力响应减弱,其中张力腿的刚度对悬浮隧道管体的震动影响较为显著.更多还原

【Abstract】 The submerged floating tunnel stayed by tension legs was simplified as the superposition of an elastic beam and an elastically supported rigid beam,the motion equations of forced vibration for the floating tunnel tube based on the Bernoulli-Euler beam theory were presented,then the nonlinear term of the dynamic equations was linearized equivalently. The pseudo excitation was input to simulate the random seismic impact and study the response of the submerged floating tunnel tube,with the displacement power spectrum at the middle point given and discussed detailedly. The displacement power spectrum analysis indicates that the displacement response of the tube decreases with the spring stiffness of the supporting tension legs and the damping coefficient of the energy dissipation devices,of which the former is of much higher significance.更多还原