中文摘要：

大坝升船机是利用机械装置升降船舶使之快速过坝的重要通航建筑物.承船厢是引导船舶过坝的载体,是大坝升船机的核心设备.由于承船厢的体形与质量巨大,在地震作用下将与升船机塔柱之间发生复杂的耦合振动.以三峡大坝升船机为工程背景,利用动力等效原理,将传统的升船机三维板壳有限元模型简化为三维杆系有限元模型;通过静力缩聚建立适用于升船机结构耦合振动分析的数值模型,验证对升船机塔柱和承船厢耦合振动进行控制的必要性;讨论弹簧、黏滞液体阻尼器和磁流变液阻尼器三种连接装置对地震作用下结构耦合振动的控制效果.计算结果显示,与被动控制装置相比,采用合适半主动控制策略的磁流变液阻尼器具有更好的减振效果,在实际工程中有着广阔的应用前景.

英文摘要：

Vertical ship lift is a navigation structure using mechanical device for lifting the ship to quickly pass across the dam. Ship chamber is the carrier to guide the ships passing the dam as well as the core equipment of the ship lift. Because of the large size and the mass of the huge ship chamber, complex coupling vibration will happen between the chamber and the tower of the ship lift under the earthquake condition. In this article, taking the ship lift of the Three Gorges Dam as the engineering background, a three dimensional finite element model was established based on the dynamic equivalence principle. In this model, the plate and shell component structure was simplified to a rod system. Numerical model for coupled vibration analysis of the ship lift structure was established based on the static condensation principle. The simulation results demonstrate that the coupled vibration between the tower and the chamber of the ship lift needs to be controlled. The effect of spring, fluid viscous damper and magneto-rheological damper on structural coupling vibration control under seismic condition was discussed. Calculation results show that using the magneto-rheological damper for semi-active control is better than using the passive control device for vibration reduction of the structure..