| 基于荷载谱的桥梁交通激励模型 |
| |
| 引用本文： | 宋静,吴子燕,林湘,覃小文.基于荷载谱的桥梁交通激励模型[J].河北工程大学学报,2007,24(2):15-19. |
| |
| 作者姓名： | 宋静 吴子燕 林湘 覃小文 |
| |
| 作者单位： | 西北工业大学力学与土木建筑学院 西安710072 |
| |
| 基金项目： | 国家高技术研究发展计划(2006AA04Z437) |
| |
| 摘 要： | 提出了一种基于荷载谱的桥梁交通激励模型,给出建立这种激励模型功率谱密度矩阵的方法。应用动力节点加载方法,将移动荷载转化为等效的节点荷载;对过滤的泊松过程应用坎贝尔定理。数值分析表明,机车按正常稳定的速度行驶,此种模型可以反映桥梁交通激励的主要性质,识别机车荷载作用下桥梁的结构特性。
|
| 关 键 词： | 桥梁健康监测 交通激励 仅基于输出的系统识别 移动荷载 白噪声模型 空间相关性 |
| 文章编号： | 1673-9469（2007）02-0015-05 |
| 收稿时间： | 2006-12-19 |
| 修稿时间： | 2006-12-19 |
Force spectrum-based traffic excitation model for highway bridges |
| |
| Authors: | SONG Jing WU Zi-yan LIN Xiang QIN Xiao-wen |
| |
| Abstract: | A traffic excitation model based on force spectrum were presented,a method to construct this model's spectrum density matrix which involves first converting the moving load into equivalent nodal excitation by the dynamic nodal loading approach were proposed;then the Campbell's theorem applied for the filtered Poisson Process.The result of numerical analysis shows that the proposed model can represent the primary nature of the traffic excitation as long as the normal speed of the vehicles on the bridge. |
| |
| Keywords: | bridge heath monitoring output-only system identification traffic excitation moving forces white noise model spatial correlation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
