变速移动荷载作用下的弹性地基板的动力反应分析  

DYNAMIC RESPONSE TO A PLATE ON ELASTIC FOUNDATION UNDER MOVING LOAD WITH VARYING VELOCITY

作　　者：钟阳[1] 周福霖[2] 张永山[2] 

机构地区：[1]大连理工大学土木学院,大连116024 [2]广州大学土木学院,广州510405

出　　处：《振动与冲击》2008年第1期61-64,共4页Journal of Vibration and Shock

基　　金：科学技术部重大基础研究项目(编号2004CCA03300)资助

摘　　要：利用三维Fourier积分变换法,本文推导出了在变速移动荷载(加速或减速)作用下,弹性地基上无限大板动态挠度和应力的解析表达式。在分析过程中把弹性地基视为文克尔地基,分别讨论了移动荷载的速度、加速度以及地基刚度等参数对板的动态挠度和应力的影响。根据文中所给出数值算例表明,移动荷载的速度、加速度和地基的反应模量是主要影响因素。板的动态挠度和应力随着车辆荷载速度和加速度的变化而变化。Dynamic response of a plate on elastic foundation under moving loads with varying velocity is investigated and the analytical solution to its dynamic deflection and stress is obtained by using the 3 dimenal Fourier Transformation.The elastic foundation is regarded as Winkler model.It is found that the dynamic response of the plate changes with the velocity and the acceleration of the moving load.The analysis of an example shows that the velocity,the acceleration of the moving load and the stiffness of the foundation may significantly affect the dynamic response of the plate.

关 键 词：无限大板 弹性地基 变速移动荷载 动力反应 

分 类 号：TU435[建筑科学—岩土工程]