水中悬浮隧道锚索参数振动分析和控制

Parametric vibration analysis and control of submerged floating tunnel tethers

为了进一步研究水中悬浮隧道锚索的参数振动以及振动控制,考虑到流的影响,建立水中悬浮隧道锚索的非线性振动模型,并利用数值方法推导求解了锚索的非线性振动方程,同时采用一种被动质量阻尼器进行振动控制。研究结果表明:锚索的参数振动与锚索的初张力、参数激励幅值、频率比有关,并具有明显的非线性特征;流的作用会对锚索的参数振动幅值产生一定影响,但流的作用不会改变锚索的共振规律;对锚索参数振动提出的振动控制装置,计算结果表明具有良好的减振效果。

To further study the parametric vibration of a submerged foating tunnel tether and vibration control of tether, a nonlinear vibration model of submerged floating tunnel tether is proposed considering the influence of the flow. The non-linear vibration equation of a submerged floating tunnel tether is derived, and solved by numerical method. Adopting a passive mass damper, we control the vibration of tether. It may be concluded that the parametric vibration response of a submerged floating tunnel tether is related to tension excitation and frequency ratio damping, and the parametric vibration response of a submerged foating tunnel tether has obvious nonlinear characteristics. The parametric vibration amplitude of tether can be affected by flow, but the flow can＇ t affect the resonance law of tether. Numerical results show that the vibration control device of tether is considerably effective.