考虑流固耦合的充水式橡胶坝自振特性研究

发布时间：2018-04-16 09:22

本文选题：橡胶坝 + 自振特性　；参考：《水电能源科学》2016年05期

【摘要】：为保证实际运行中橡胶坝的结构安全,考虑坝体和水体流固耦合的相互作用,利用有限单元法计算了充水式橡胶坝的自振频率和周期,研究了不同坝高、内压比及上游挡水等对橡胶坝自振特性的影响。结果表明,充水式橡胶坝的振动为坝体的整体振动,自振频率较小,振动方向主要为顺河向;随着坝高的升高,坝体的基频变小,自振周期变大;随着内压比的增加,坝体的基频变大,自振周期变小;上游挡水时的自振频率较无水时的有明显降低,可为橡胶坝设计提供参考。
[Abstract]:In order to ensure the structural safety of rubber dam in practical operation, considering the interaction between dam body and fluid-structure of water body, the natural vibration frequency and period of rubber dam filled with water are calculated by finite element method, and the different dam heights are studied.The influence of internal pressure ratio and upstream water retaining on the natural vibration characteristics of rubber dam.The results show that the vibration of the filled rubber dam is the whole vibration of the dam body, the natural vibration frequency is small, the vibration direction is mainly along the river, with the increase of the dam height, the foundation frequency of the dam becomes smaller, the natural vibration period becomes larger, and with the increase of the internal pressure ratio, the foundation frequency of the dam becomes smaller, and the natural vibration period increases with the increase of the internal pressure ratio.The foundation frequency of dam body becomes larger and the natural vibration period becomes smaller, and the natural vibration frequency of upstream water retaining is obviously lower than that of anhydrous dam, which can be used as a reference for the design of rubber dam.
【作者单位】：河海大学力学与材料学院;山东省淮河流域水利管理局规划设计院;
【基金】：国家“十二五”科技支撑计划(2012BAD10B02)
【分类号】：TV644

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