高导墙动力响应试验研究

Experimental study on dynamic response of high guide wall

基于水弹性模型试验,对某水电站导墙进行水动力响应测试,同时结合有限元模型进行数值计算,进而评价其安全稳定性。得出的结论是:在脉动荷载作用下,导墙动应力沿高程基本呈现先增后减分布形式,在距底部1/3范围内值偏大,在进行结构设计时应采取适当措施予以加强;导墙泄洪时不会与水流发生随机共振。模型试验与数值分析结果数据吻合良好,说明了用数值模型进行消力池导墙动力分析是可靠的。

Based on hydro-elastic model, the testing on the hydrodynamic response of the guide wall of a hydropower station is made, meanwhile, the numerical calculation is made in combination with finite element model as well, and then its safe sta- bility is evaluated. It is concluded that the dynamic stress of the guide wall is basically distributed with a mode of increasing at first and then decreasing along the height, and it is a little bit too larger at 1/3 of a distance to the bottom; for which a suitable strengthening measure must be taken during the structural design. The stochastic resonance of the guide wall with water flow is not to occur during flood discharge. The data obtained from the model experiment are better coincided with those from the nu- merical analysis, thus it proves that it is reliable to make the dynamic analysis on the guide wall of stilling pool with numerical model.