| 铁路道床路基动力响应的参数影响 |
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| 引用本文： | 聂志红,阮波,李亮.铁路道床路基动力响应的参数影响[J].交通运输工程学报,2004,4(1):34-37. |
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| 作者姓名： | 聂志红 阮波 李亮 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075 |
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| 基金项目： | 铁道部科技研究开发计划项目(2000G047 E) |
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| 摘 要： | 根据车轮-轨排-道碴模型，得到路基道碴表面荷载，利用有限元-无限元耦合法，建立了道床路基动力计算模型。结合Newmark积分法逐步求解运动方程，计算了列车荷载下，不同道碴厚度与地基刚度下道床路基的振动加速度与动位移。计算结果表明，道碴厚度对道床路基的动力响应影响显著，而路基刚度的影响不明显。
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| 关 键 词： | 铁道工程 道床路基 动力响应 有限元 无限元 |
| 文章编号： | 1671-1637(2004)01-0034-04 |
| 修稿时间： | 2003年8月28日 |
Dynamic response parameters of railway ballast-subgrade |
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| NIE Zhi-hong,RUAN Bo,LI Liang.Dynamic response parameters of railway ballast-subgrade[J].Journal of Traffic and Transportation Engineering,2004,4(1):34-37. |
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| Authors: | NIE Zhi-hong RUAN Bo LI Liang |
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| Abstract: | Load acted on the surface of ballast was obtained through the vehicle-rail-ballast model. Dynamic computational model for railway ballast-subgrade was established through a coupling of finite elements and infinite elements method. Under train loads, the vibration acceleration and dynamic displacement in ballast-subgrade, which are of different ballast thickness and subgrade stiffness, were obtained in conjunction with Newmark integration scheme. The computational results show that the ballast thickness has evident impact on the dynamic response of subgrade, but the subgrade's impact is not as evident as the ballast thickness's impact. 1 tab, 8 figs, 9 refs. |
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| Keywords: | railway engineering ballast-subgrade dynamic response finite element infinite element |
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