中文摘要：

用DASP软件对两等跨连续梁进行实验模态分析,得出该连续梁的前二阶频率及其阻尼比。同时用Midas Civil软件建立了有限元模型并进行了计算,并将其计算结果与模态分析结果相比较,结果表明：试验结果与有限元分析结果较吻合,频率误差在5%以内,说明用模态分析实验方法获得连续梁模态参数是可行的。

英文摘要：

A modal analysis test of two-span continuous beams has been carried out with the DASPsoftware in this paper.The first two order frequency and damp ratio of these continuous beams are obtained.Simultaneously,the two-span continuous beams model has been built by the Midas Civil software,and the algorithm has been performed.Then,a comparison has been made by the algorithm result and modal analysis result.The results show that： the test result is consistent with the finite element analysis result,with the frequency deviation in 5%.It is feasible to get modal parameters of the continuous beams by modal analysis experiment.