| 高速铁路简支梁桥车桥系统随机响应 |
| |
| 引用本文： | 朱艳,李小珍,强士中.高速铁路简支梁桥车桥系统随机响应[J].西南交通大学学报,2011,46(4):535-540. |
| |
| 作者姓名： | 朱艳 李小珍 强士中 |
| |
| 作者单位： | 西南交通大学土木工程学院,四川成都,610031 |
| |
| 基金项目： | 国家自然科学基金资助项目(5067815051008250); 四川省杰出青年基金资助项目(2010JQ0018) |
| |
| 摘 要： | 为探讨高速铁路简支梁桥车桥系统的随机响应,采用虚拟激励法,将轨道高低不平顺转化为一系列频率点处简谐荷载的叠加,使非平稳随机振动问题转化为确定性的时间历程问题.采用分离迭代法求解车桥系统运动方程,运用三倍标准差原理确定车桥系统响应的最大、最小值.最后,讨论了简支梁桥车桥系统的随机响应在不同列车运行速度下的变化规律.研究结果表明:车体竖向位移和加速度的随机性较大,桥梁跨中竖向响应及轮对受到的竖向轮轨力受确定性荷载的影响较大;列车运行速度对桥梁跨中竖向加速度最大值、车体竖向加速度最大、最小值的影响较大.
|
| 关 键 词： | 桥梁工程 随机响应 虚拟激励法 车桥系统 轨道高低不平顺 |
Stochastic Responses of Train-Bridge Coupling System for Simply-Supported High-Speed Railway Bridge |
| |
| ZHU Yan,LI Xiaozhen,QIANG Shizhong.Stochastic Responses of Train-Bridge Coupling System for Simply-Supported High-Speed Railway Bridge[J].Journal of Southwest Jiaotong University,2011,46(4):535-540. |
| |
| Authors: | ZHU Yan LI Xiaozhen QIANG Shizhong |
| |
| Institution: | ZHU Yan,LI Xiaozhen,QIANG Shizhong(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China) |
| |
| Abstract: | In order to analyze the stochastic responses of a train-bridge coupling system in high-speed railway,the pseudo-excitation method(PEM) was applied to transform a vertical track profile irregularity into the superposition of harmonic excitations at a series of frequency points to translate a non-stationary random vibration problem into a deterministic time history problem.The method of separate iteration was used to solve the equations for the coupling system.The maximum and minimum responses of the coupling... |
| |
| Keywords: | bridge engineering stochastic response pseudo-excitation method train-bridge coupling system vertical track profile irregularity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
