大型双槽渡槽动力特性分析

采用 2 0结点空间块体单元剖分渡槽槽身和槽墩 ,分别用耦合自由度、低刚度块体单元、多个弹簧单元模拟槽身横向拉杆和加劲肋、渡槽槽内水体及盆式橡胶支座 ,建立大型双槽渡槽结构动力分析的有限元模型 ,并对南水北调水利工程某大型双槽渡槽进行了多工况动力特性分析 ,探讨了渡槽横向拉杆、槽内水体及盆式橡胶支座等多种因素对渡槽整体动力性能的影响 .计算结果表明 ,渡槽横向拉杆对渡槽的横向动力特性影响不可忽略 ,盆式橡胶支座竖向刚度在一定范围内影响渡槽的动力特性 ,槽内水位的高低及分布情况对渡槽的动力特性影响很大 .

Dynamic Analysis of Large-scale Aqueduct with Double Troughs

To get the dynamic properties of the large-scale aqueduct with double troughs, brick elements with 20 nodes are used to mesh the troughs and pier for the agueduct is a complex structure and there are some influencing factors on its dynamic properties. Coupled freedoms, spring elements and low stiffness brick elements are used to simulate the cross linking components, pot type rubber bearing and water in aqueduct respectively, so a finite element model is built. Using this FEM model, some load cases of the large-scale aqueduct with double troughs used in the project of Transporting water from South China to North China is analyzed. The results of the analysis imply that the dynamic properties of the aqueduct can be improved by setting cross linking components, by changing the stiffness of the pot type rubber bearing and by changing the water level in the aqueduct.