折板理论在箱梁动力分析中的应用

Appbcation of Theory of Folded Plates in the Dynamical Analysis of Box Girder

本文应用折板理论对箱梁的固有振动进行了探讨，推导出箱梁自由振动运动方程及确定箱梁固有频率的特征方程，经算例验证，结果表明，折板法计算简便，结果可靠，有相当高的精度。

Based on the theory of folded plates,the natural vibration of box girder structure is studied.The equations of motion for straight box girder in free vibration and the characteristic equation of natural frequency are derived. A simply supported box girder with uniform section as an engineering structure is given as an example,The results show that the proposed method is simple and reliable,and has a relatively high accuracy.