大型升船机支承结构的弯扭耦连振动分析

Analysis of Coupling Vibration of Bending and Torsion in a Giant Boat lifting Structure

将楼板的作用沿高度方向连续化 ,把升船机支承结构等效简化为广义悬臂梁 ,并建立其弯扭耦连振动微分方程 ,通过广义坐标变换 ,使振动方程解耦 ,然后求解结构的自振频率和振型 ,文末给出了算例 .

In this paper,a generalized cantilever beam is set up and a differential equation of coupling vibration of bending and torsion is obtained after considering the continued effect of the floor along the height of a giant boat lifting structure.The defferential equation is decoupled through generalized coordinate transformation,and then the structural frequency and mode are worked out by numerical method whose example is given at the end.