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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第2期    总第46期    2012年4月

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文章编号:1672-7029(2012)02-0029-05
考虑剪切变形及转动惯量的H 型钢梁自由振动
李静斌,陈淮,葛素娟

(郑州大学土木工程学院,河南郑州450001)

摘 要: 以3 种典型热轧H 型钢截面简支梁为研究对象,分别采用初等梁理论模型和考虑剪切变形及转动惯量影响的高等梁理论模型,分析在不同长细比情况下H 型钢截面简支梁前3 阶自由振动频率的差异,得出了初等梁理论进行H 型钢梁自由振动分析的适用条件,该结论可供结构动力分析及动力设计参考。

 

关键字: H 型钢梁; 自由振动频率; 剪切变形; 转动惯量; 长细比

Free vibration of H-shape steel beam considering shear deformation and rotational inertia
LI Jing-bin,CHEN huai,GE Su-juan

School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China

Abstract:With three kinds of typical hot-rolled H-shape steel section free beam as research objective,the difference of former third-order free vibration frequency with different slenderness ratio was analyzed by elementary beam theory model and higher beam theory model which considering the shearing deformation and the inertia effect.The applicable conditions of free vibration analysis by the elementary beam theory on H-shape steel beam is obtained.This conclusion provids reference for dynamic analysis and the dynamic design.

 

Key words: H-shape steel beam; free vibration frequency; shear deformation; rotational inertia; slenderness Ratio

ISSN 1672-7029
CN 43-1423/U

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