薄壁梁桥的自振特性研究  

作　　者：胡启平[1] 董慧敏[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《江西建材》2015年第8期194-195,共2页Jiangxi Building Materials

摘　　要：本文在薄壁梁截面上采用线性插值函数来描述截面各点的纵向位移;基于哈密顿对偶体系,考虑薄壁梁的剪力滞后效应,导出薄壁梁自振特性的哈密顿方程;采用两端边值问题的精细积分法,确定方程的高精度数值解。The linear interpolation was applied to describe the longitudinal displacement of the cross - section points in the cross - seetion. The Hamilton equation of the structure Natural vibration frequency of the thin - walled beam under considering the shear lag effect is derived based on the Hamilton dual system. The precise integration method is used to determine the high precise numerical solution of the equation.

关 键 词：剪力滞效应 薄壁结构 线性插值 哈密顿对偶体系 自振特性 

分 类 号：O316[理学—一般力学与力学基础]