中文摘要：

为了得到曲线连续梁的固有频率和振型,以便为桥梁检测提供校核依据;有机地结合了有限元模态分析方法和试验模态分析方法,对某两等跨曲线连续梁进行了模态分析,得到曲梁的前4阶频率及振型,并将试验结果与有限元计算结果进行对比。结果表明：除去一阶频率误差较大外,第2～4阶相对误差均小于4%,振型基本吻合;一阶固有频率受扭转影响较大,第2～4阶频率受扭转影响依次减小;曲梁前4阶频率均小于等跨直梁。

英文摘要：

In order to obtain the natural frequency and mode of vibration of two-equal-span continuous curve beam,and to provide a basis for the check of bridge detection,by combining the finite element modal analysis and modal experimental analysis,the model of a two-equal-span continuous curve beam was analyzed. The first four vibration modes and frequencies were obtained. By comparing the two results,it showed that the relative errors from the 2nd to the 4th frequencies are all less than 4% but the first order natural frequency is large. The mode of vibration is basically the equal. The torsion of curve beam can have a significant impact on the first order natural frequency and their affecting degree decreases in orders from 2nd to 4th frequency. The first four vibration frequencies of the curve beam are less than the straight beam.