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本文研究二滩拱坝中孔泄水时弧门的振动问题。首先应用实验模态分析技术(时域与频域)、有限元以及有限元、边界元结合的方法取得了弧门结构完整的动特性数据,包括弧门在空气、静水及动水中的自振频率。在实验模态分析的基础上,应用CADA技术进行了结构动特性的灵敏度分析与优化计算,取得了弧门结构的动态优化方案。流激闸门振动主要研究了闸门的整体振动,还初步分析了支臂的动力稳定性。
This paper studies the vibration problem of arc gate when the middle hole of Ertan arch dam discharges. Firstly, the dynamic characteristics of the arc-gate structure are obtained by the combination of experimental modal analysis (time domain and frequency domain), finite element method, finite element method, and boundary element method. The dynamic characteristics of the arc gate structure are obtained, including natural vibration of arc gate in air, frequency. Based on the experimental modal analysis, the sensitivity analysis and optimization calculation of structural dynamic characteristics were carried out by using CADA technology. The dynamic optimization scheme of arc gate structure was obtained. The main vibration of the floodgate is the overall vibration of the gate, and the dynamic stability of the boom is also analyzed.