| 变速移动荷载作用下弹性地基梁的动态反应 |
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| 引用本文： | 钟阳,孙爱民,周福霖,张永山.变速移动荷载作用下弹性地基梁的动态反应[J].沈阳建筑工程学院学报(自然科学版),2007,23(5):776-779. |
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| 作者姓名： | 钟阳 孙爱民 周福霖 张永山 |
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| 作者单位： | 大连理工大学土木学院 辽宁大连116024(钟阳，孙爱民)，广州大学土木学院 广东广州510405(周福霖，张永山) |
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| 摘 要： | 目的为确定移动荷载的速度、加速度以及地基刚度等参数对梁动态挠度和弯矩的影响.方法利用Fourier积分变换法,推导在变速移动荷载作用下,弹性地基上无限长梁动态挠度和弯矩解析表达式.结果在给定移动荷载速度的情况下,梁的挠度随荷载移动加速度的增大而减小,当加速度为正时减小的幅度大,加速度为负时减小的幅度小;梁的弯矩与梁的挠度一样随移动的加速度增大而减小.在给定荷载移动的加速度的情况下,梁的弯矩随荷载移动的速度增大而增大.结论梁的动态挠度和弯矩随着车辆荷载移动速度和加速度的变化而变化.
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| 关 键 词： | 弹性地基梁 变速动荷载 动态反应 加速或减速 |
| 文章编号： | 1671-2021（2007）05-0776-04 |
| 修稿时间： | 2007-05-26 |
Dynamic response of beam on elastic foundation caused by variable speed moving load |
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| Zhong Yang,Sun Aiming,Zhou Fulin,Zhang Yongshan.Dynamic response of beam on elastic foundation caused by variable speed moving load[J].Journal of Shenyang Archit Civil Eng Univ: Nat Sci,2007,23(5):776-779. |
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| Authors: | Zhong Yang Sun Aiming Zhou Fulin Zhang Yongshan |
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| Affiliation: | 1.School of Civ.Engrg.Dalian Univ.of Tech.Dalian 116024;2.School of Civ.Engrg.,GuangZhou Univ.,510405 |
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| Abstract: | Dynamic response of beam on elastic foundation caused by variable moving loads was investigated and the analytical solution of deflection and stress for plate was obtained by using the Fourier Transforming.The elastic foundation is regarded as Winkler model.It is found that the dynamic response of beam 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 foundation may significantly affect the dynamic response of the beam. |
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| Keywords: | beam on elastic foundation moving load dynamic response acceleration or deceleration |
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