To carry out the experimental study of flow-induced vibration for roller compacted concrete dam (RCCD), the improved hydroelastic model experiment (HEME) technology that satisfying both the hydraulic and structural dynamic similarities is presented, and an improved combinatorial method is proposed to effectively and accurately calculate the dynamic characteristics of RCCD model under natural excitation and complex environment. Due to the insufficient study on the simulation technique for the interfaces between adjacent concrete layers in RCCD, the conventional HEME technology which is frequently applied is not applicable to the RCCD dynamic analysis. Therefore, the hydroelastic simulation schemes for cold joints and ordinary interfaces in RCCD are firstly presented based on experimental and theoretical researches and numerical verification. Then, the integral RCCD model is established and its dynamic displacements under flood discharge excitation are tested. Furthermore, the proposed method that combines the advantages of natural excitation technique (NExT), singular entropy (SE) method, and eigensystem realization algorithm with data correlation (ERA/DC) method is applied to calculate the dynamic characteristics of RCCD model. The dynamic characteristics of the RCCD model calculated by the proposed theoretical method are very similar to those of the actual RCCD calculated by numerical simulation, which indicate the effectiveness and accuracy for the improved HEME technology and combinatorial method.

为了进行碾压混凝土坝（RCCD）的流致振动实验研究，提出了一种既能满足水力和结构动力相似性的改进的水弹性模型实验（HEME）技术，又提出了一种改进的组合方法来有效地解决这一问题。并准确计算了自然激发和复杂环境下RCCD模型的动力学特性。由于对RCCD中相邻混凝土层之间的界面模拟技术的研究不足，因此经常使用的常规HEME技术不适用于RCCD动力分析。因此，首先基于实验和理论研究以及数值验证，提出了RCCD冷接头和普通界面的水弹性模拟方案。然后，建立了完整的RCCD模型，并测试了其在洪水放电激励下的动态位移。此外，该方法结合了自然激发技术（NExT），奇异熵（SE）方法和本征系统实现算法与数据相关性（ERA / DC）方法的优点，来计算RCCD模型的动态特性。所提出的理论方法所计算的RCCD模型的动态特性与数值模拟所计算的实际RCCD的动力学特性非常相似，这表明改进的HEME技术和组合方法的有效性和准确性。该方法结合了自然激发技术（NExT），奇异熵（SE），特征系统实现算法与数据相关性（ERA / DC）的优点，计算了RCCD模型的动力学特性。所提出的理论方法所计算的RCCD模型的动态特性与数值模拟所计算的实际RCCD的动力学特性非常相似，这表明改进的HEME技术和组合方法的有效性和准确性。该方法结合了自然激发技术（NExT），奇异熵（SE），特征系统实现算法与数据相关性（ERA / DC）的优点，计算了RCCD模型的动力学特性。所提出的理论方法所计算的RCCD模型的动态特性与数值模拟所计算的实际RCCD的动力学特性非常相似，这表明改进的HEME技术和组合方法的有效性和准确性。