Influences of train speed and concrete Young's modulus on random responses of a 3D train-track-girder-pier coupled system investigated by using PEM
Influences of train speed and concrete Young's modulus on random responses of a 3D train-track-girder-pier coupled system investigated by using PEM
复制标题
利用 PEM 研究列车速度和混凝土杨氏模量对 3D 列车-轨道-梁-墩耦合系统随机响应的影响
DOI：
10.1016/j.euromechsol.2018.11.017
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发表时间：
2019-03
影响因子：
5.5
通讯作者：
Mao Jianfeng
中科院分区：
文献类型：
--
作者：
Tan Sui;Yu Zhiwu;Shan Zhi;Mao Jianfeng
本文建立了列车-轨道-梁-墩耦合系统的精细三维（3D）振动模型，并使用伪激励法（PEM）进行求解。考虑随机轨道不平顺的激励，通过高速铁路实例研究，通过与蒙特卡罗方法给出的结果进行比较，验证了模型和方法的有效性。采用随机轨道不平顺激励的高速铁路桥梁预应力混凝土箱梁，研究列车速度和混凝土杨氏模量对耦合系统随机动力响应的影响。结果表明，与蒙特卡罗方法相比，PEM 对于列车-轨道-梁-墩系统的随机动态分析的计算效率提高了 1-2 个数量级。客车车身垂直加速度的功率谱密度（PSD）随时间变化很小，但随轨道不平顺频率变化显着。客车车身垂直加速度的 PSD 曲线的所有第一个峰值都出现在相同的基频附近。梁混凝土杨氏模量对桥梁竖向加速度功率谱密度影响较大，但振动能量在频域的分布变化很小。研究结果可应用于铁路设计和维护。
In this paper, a refined three-dimensional (3D) vibration model for a train-track-girder-pier coupled system is established and solved using a pseudo-excitation method (PEM). Considering the excitation of random track irregularities, a high-speed railway case study is presented to verify the effectiveness of the model and the method by comparing the results with those given by a Monte Carlo method. A pre-stressed concrete box girder for a high-speed railway bridge with excitation of random track irregularities is used to investigate the influences of train speed and concrete Young's modulus on the random dynamic responses of the coupled system. The results show that the PEM is 1-2 orders of magnitude more computationally efficient for the random dynamic analysis of the train-track-girder-pier systems compared with the Monte Carlo method. The power spectral densities (PSDs) of vertical accelerations of coach body change only slightly with time, but they change significantly with track irregularity frequency. All the first peaks of the PSD curves for the coach body vertical acceleration are shown to appear at around the same fundamental frequency. The concrete Young's modulus of the girder has a large influence on the PSDs of the vertical acceleration of the bridge, but the distribution of vibration energy in the frequency domain varies very little. The results can be applied to railway design and maintenance.
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影响因子：
4.1
作者：
Jeongwon Park;Sangkeun Ahn;Jaehyung Kim;H. Koh;Junhong Park
通讯作者：
Jeongwon Park;Sangkeun Ahn;Jaehyung Kim;H. Koh;Junhong Park
运动车辆下伯努利欧拉梁内力的有限元公式
影响因子：
4.7
作者：
Ping Lou;F.T.K. Au
通讯作者：
F.T.K. Au
DOI：
10.1680/dorb.34716
发表时间：
1996
期刊：
--
影响因子：
--
作者：
L. Frýba
通讯作者：
L. Frýba
影响因子：
5
作者：
P. Lou;Zhi-wu Yu;F. Au
通讯作者：
P. Lou;Zhi-wu Yu;F. Au
影响因子：
2
作者：
E. Kardas-Cinal
通讯作者：
E. Kardas-Cinal