论文部分内容阅读
本文用有限元子结构方法分析响洪甸拱坝的动水压力,以广义座标及振型迭加法求解满库坝体的位移响应,分析中考虑了不同的库底淤积层边界条件,在简谐激振下,计算得到的动水压力分布与原型实测结果符合良好,对不同水库模型(包括空库,满库不可压缩,满库可压缩库底刚性反射、库底均匀吸收以及库底粘弹性非均匀吸收等)进行了简谐激振分析,得到了动水压力与坝体位移的频率响应曲线,从中获得了若干有关库水压缩性影响的规律性认识,
In this paper, the hydrodynamic pressure of the arch dam of Xianghongdian Dam is analyzed by finite element method. The displacement response of the dam with full reservoir is solved by generalized coordinates and modal superposition method. Different boundary conditions of reservoir sediment are considered, Under simple harmonic excitation, the calculated hydrodynamic pressure distribution is in good agreement with the measured results of the prototype. The simulation results of different reservoir models (including empty depot, full incompressible reservoir, rigid reflex of full depressible reservoir bottom, uniform absorption at the reservoir bottom, Viscoelastic non-uniform absorption, etc.), the frequency response curves of hydrodynamic pressure and dam displacement are obtained, and some regularities about the influence of reservoir water compressibility are obtained.