弹性支撑梁在移动荷载作用下的振动  

Vibration of Elastic Support Beam under Moving Loads

作　　者：张军 江克斌[2] 朱光远[2] 

机构地区：[1]总装工程兵科研一所,江苏无锡214035 [2]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《工兵装备研究》2007年第4期5-8,共4页Engineer Equipment Research

摘　　要：为了研究弹性支撑梁在移动荷载作用下的振动问题，将弹性支撑梁分为离散型弹簧支撑和连续型弹簧支撑，并利用假设模态法对两种梁的动力响应问题进行了研究。结果表明，对于离散型和连续型弹性支撑梁的动力位移表达式是相同的，不同之处在于频率的表达式不同，并且计算表达式不仅适用于弹簧刚度相同的情况，也适用于弹簧刚度变化的情形。In order to research the vibration problems of elastic supported beams under moving loads, the elastic supported beams are classified into two kinds, one is discrete spring supported beam and the other is continuous spring supported beam. The dynamic responses to the two kinds of beams are researched by the assumed mode method. The results indicate that the formula of dynamic displacements for discrete elastic supported beam is the same as that of the continuous elastic supported beam, while the formulas of frequency of them are different. The present study is applied to the vibration system not only with the same spring stiffness but also with the varying one.

关 键 词：弹性支撑 移动荷戢 简支梁 振动 

分 类 号：U448[建筑科学—桥梁与隧道工程]