离心机振动台输入输出波相似程度评价方法研究

The Evaluation of Input and Output Wave Similarity for a Biaxial Centrifuge Shaker

离心机振动台台面真实振动(输出波)与试验设计采用的地震波(输入波)之间的相似程度是反映振动台性能的一个重要指标。中国水利水电科学研究院在2010年12月成功安装了具有水平和垂直双向控制振动的离心机振动台R500B,进行了8次台面性能检测试验,以此试验结果为基础,结合2种对于输入输出地震波相似程度的评价方法,检验了R500B模拟各类地震波的性能。评价结果表明:由于R500B安装了地震波输入调整模块,能够较好地模拟多种地震波,因此能够模拟各类建筑物在不同地震条件下的各种反应,说明使用R500B开展的离心动力模型试验具有较高的可靠性和良好的工程应用前景。

The degree of similarity between the input wave（seismic wave used in the test） and output wave（real shake wave on the shaker） is an important index reflecting the performance of centrifuge shaker table.A new biaxial shaker R500B,installed by China Institute of Water Recourses and Hydropower Research in December,2010,can generate both vertical and horizontal earthquake waves.Several tests have been carried out to evaluate the performance of the table since its commissioning.This paper presents the performance of the R500B shaker based on the test data from two methods of evaluating the similarity degree of the input and output waves.The results demonstrate that the R500B shaker has good reliability and can well simulate multiple kinds of seismic waves owing to the installed adjustment module for better transfer function.More applications are expected with R500B shaker in the geotechnical dynamic testing area.