升船机与承船厢耦合振动的分析与控制

升船机与承船厢耦合振动的分析与控制(中文6000字,英文7000字)
摘要
由于船舱悬挂在升船机顶部，因此在地震过程中船舶升降结构与船舱之间可能会发生耦合振动。进行调查以探索使用不同装置连接船舶升降塔和船舱以防止耦合振动的可能性。建立三维壳体有限元模型，然后通过动力等效原理将其简化为三维桁架有限元模型。通过静态凝结形成耦合振动分析的数值模型，计算了在无连接，刚性连接，弹簧，粘性液体阻尼器和磁流变五种连接条件下船舶结构与船舱之间的耦合振动响应流体阻尼器。结果表明，两者之间不存在任何联系和僵化的联系是不明智的;与被动控制装置相比，如果采用适当的半主动控制策略，则磁流变流体阻尼器提供更好的减振效果。
Analysis and Control of the Coupled Vibration Between the Ship Lift and Ship Chamber
Abstract Coupled vibrations may occur between ship lift structure and the ship chamber during seismic process due to the ship chamber being hung at the roof of the ship lift. An investigation is carried out to explore the possibility of using different devices to connect the ship lift towers and the ship chamber to prevent the coupled vibrations. A three-dimensional shell finite element model is established, and then simplified into a three-dimensional truss finite element model through dynamic equivalent principle. And the numerical model of coupled vibration analysis is formed through static condensation, calculating the cou- pled vibration response between the ship lift structure and the ship chamber under five connection conditions: no connection, rigid connection, spring, viscous liquid damper and magneto-rheological fluid damper. The result shows that no connection and rigid connection between them are both inadvisable; the magneto-rheological fluid damper provides better vibration damping effect if suitable semi- active control strategy is applied, in comparison with passive control devices.