摘要
根据弹性稳定理论及Galerkin原理研究了斜梁在热状态下的动力特性问题,并讨论分析了温度、长细比、梁截面形式、倾斜角、荷载、阻尼力对斜梁动力稳定性的影响,研究表明,在热效应下杆件的倾角、长细比、梁截面形式、振动荷载对斜梁的动力特性影响较大,而杆件的阻尼力则影响较小,可忽略不计.并提出在实际工程中如何减小振动的相关措施,可供工程结构动力分析与设计参考.
The problems of the dynamic characteristics of inclined beams under thermal state is studied by the elasticity theory and the Galerkin principle. The effects of temperature, ratio of length to thinness, section forms of beam, inclined angle, loads and damping force are discussed. Research reveals that the inclined angle, ration of length to thinness, section forms of beams and vibration loads of members under heat effect significantly affect the dynamic characteristics of inclined beams, while the influence of damping force is relatively small, almost neglectable. Some measures are proposed to reduce the vibration of members in practical engineering. It is hoped that these may prove to be of some value for dynamic analyses and engineering structure design.
基金
国家重点基础研究专项经费(2001CB409600)
中国博士后基金(2003033394)
安徽省优秀青年科技基金(04044057)资助项目.
关键词
温度
阻尼
参数共振
振幅
梁截面形式
振动荷载
temperature
damping
parameter resonance
amplitude
section forms of beam
vibration loads
