摘要
本文第一部分简要介绍通过室内模型试验研究可压缩库水共振效应的初步成果。试验是对固定在3倍于坝高的矩形水槽中的筒形拱坝进行的。考虑了库底淤砂效应,并和用边界点法进行计算的结果作了比较,进一步探讨了在实际工程中影响库水共振效应的各项因素。 第二部分,通过在白山拱坝模型实测,以及用三向电拟试验求得的振型动水压力,校验了用流固耦合有限元法及目前常用的修正威氏(Westergaard)公式求得的结果。验证表明:流固耦合的有限单元数学模型给出的结果与试验结果很符合,而修正威氏公式给出的结果偏大。
The first part of this paper describes results of a preliminary laboratory experimental investigation on the resonance effect in the reservoir associated with compressibility of the reservoir water. The test is carried out on a cylindrical arch dam outlined by a rectangular tank with the length of 3 times of the dam height. The effect of silt deposited on the reservoir bottom is also investigated. An analysis using boundary point method is performed. The factors influencing the resonance effect of the compressible reservoir water in practical cases are discussed.In the second part of this paper the results of laboratory tests on hydrodynamic pressure of Bai-Shan arch dam are presented and correlated with the finite element model analytical results. The tested results are obtained both from direct pressure transducer measuring and from electri-canalog method. The analysis with added mass are derived both from finite element reservoir modelling techniques and the modified Westerga-ard's formula. The experimental results verify with the finite element reservoir modelling, The modified Westergaard's formula gives results with higher magnitude.
出处
《水利学报》
EI
CSCD
北大核心
1989年第7期29-39,共11页
Journal of Hydraulic Engineering
基金
水利水电科学基金项目
