计算力学学报Issue(6)：802-806,5.DOI:10.7511/jslx201306009
考虑剪力滞和剪切变形的薄壁箱梁自振特性分析
Analysis of free vibration characteristic of thin-wall box-girder considering shear lag and shear deformation
摘要
Abstract
Based on energy variation principle ,the differential equation of free vibration and the corre-sponding boundary conditions of box girder with consideration for the shear lag effect meeting self equili-brated stress ,shear deformation as well as rotational inertia were induced .The ANSYS finite element solutions were compared with the analytical solutions by calculation examples and the validity of the pro-posed approach was verified .The obtained formulas developed the shear lag theory .Some meaningful conclusions for engineering design were obtained .The decrease extent of each order natural frequency of the box-girder beam is great under the shear lag effect .The shear lag effect of box girder increases when frequency order rises ,and increases w hile span-width ratio decreases .关键词
薄壁箱梁/剪力滞效应/剪切变形/变分/自振特性Key words
thin-wall box-girder/shear lag effect/shear deformation/calculus of variation/characteristic of free vibration分类
通用工业技术引用本文复制引用
周旺保,蒋丽忠,戚菁菁..考虑剪力滞和剪切变形的薄壁箱梁自振特性分析[J].计算力学学报,2013,(6):802-806,5.基金项目
国家自然科学基金（51078355，50938008，51378502）；教育部博士研究生学术新人奖；湖南省博士生科研创新（CX2011B093）；中央高校基本科研业务费专项基金（20117Q008）；中南大学优秀博士生奖励助学金（2011ybjz031）资助项目． （）
