某大型升船机振动模型设计中的关键问题探讨

Study on Key Problems of Model Design in Shaking Table Test of Large Ship Lift

为了解某大型齿轮齿条爬升式升船机塔柱结构抗震性能,根据中国建筑科学研究院大型三向六自由度模拟地震振动台承重能力制作了1∶25的升船机模型,但在模型设计过程中遇到了模型材料及其配比选择、动力相似关系确定(模型初始相似常数、底部筏基对自振周期的影响、底部筏基对应力及船厢耦合力的影响、模型最终相似常数)、船厢与塔柱间耦合力测定、模型制作及吊装几个关键问题,对此进行了深入分析和探讨,为下一步模型在振动台上顺利进行试验奠定了基础。

For studying the structural seismic behavior of large rack and pinion vertical ship lift, according to large three-direction six degree of freedom simulated earthquake vibration table in China Academy of Building Research, a shaking table test of a 1/25 scale model of ship lift is conducted. Several key problems on the selection of model materials and mix proportion, determination of dynamic similarity relationship （model initial similarity constant, influence of bottom foundation on natural vibration period, stress and coupling force between ship and compartment, model ultimate similarity constant）, measurement of coupling force between ship and tower, model making and hoisting are deeply studied, which laid the foundation for further shake table model test.