Through the finite element modal analyzing by ANSYS software, the natural frequencies and mode shapes of the unbonded prestressed simple concrete beam in different prestress levels are gotten.

• 论文采用有限元分析软件ANSYS对预应力混凝土简支梁进行了动力分析,得到了不同预应力作用下梁的自振频率及试验难于测得的模态振型。