Studies on vibration generation and transmission in tack and ground from high-speed trains

高速列车粘地和地面振动产生与传播研究

• 批准号: 13650522
• 负责人: TAKEMIYA Hirokazu
• 金额: $ 2.5万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650522/
• 关键词: train track-ground dynamic interaction; Vibration generation; Track-ground system; FEM-BEM method; Frequency-wavenumber spectrum; computer simulation; mitigation procedure; 地盤振動; 地盤振動 振動数-波数スペクトル

The present investigation focused first on the dynamic behavior of the track and the wave motions in the nearby ground where the train speed approaches the wave velocity in the underlying ground. Then, the vibration mitigation is considered by a rationally designed countermeasure of limestone columns beneath the track in view of the wave motions at site. For illustrative example, the case of X-2000 high-speed train at the West Coast in Sweden is demonstrated with some comparison with the field measurement.The present modeling of the track-ground system lead an excellent response prediction in comparison with the field measurements. The sleepers' effect on vibration is clarified in the frequency domain : namely, at the low train-speed of 70 km/h they generated the frequencies that are determined by the integer multiplied quotient of train speed against sleepers spacing, however, for 200 km/h the dynamic wave generation more dominates the response so that the sleepers' effect appears almost negligibly small. The velocity component, on the other hand, is greatly affected by the presence of sleepers for the train speed of 70 km/h but not for the 200 km/h. There are different situations we concern for response levels either by displacement, velocity or acceleration. The appropriate engineering judgment should be made on the basis of most involved physical quantities.For controlling of the track vibration the installment of lime-cement columns were made beneath it This worked as the wave impeding barrier and proved to be very effective to reduce the large response displacements for 200 km/h to the very small level for 70 km/h. The visual presentation is demonstrated for easy understanding of the behavior of track and the soil beneath it.

本研究首先集中在轨道的动力学行为和附近地面的波动，其中列车速度接近下伏地面的波速。然后，考虑到现场的波动，通过合理设计轨道下石灰石柱的减振对策来考虑。以瑞典西海岸的X-2000高速列车为例，通过与现场实测结果的比较，验证了本文轨道-地面系统模型的有效性。轨枕对振动的影响在频域中得到澄清：即，在70 km/h的低列车速度下，它们产生的频率由列车速度与轨枕间距的整数倍商确定，然而，对于200 km/h，动态波的产生更主导响应，因此轨枕的影响几乎可以忽略不计。另一方面，对于70 km/h的列车速度，速度分量受轨枕存在的影响很大，但对于200 km/h的列车速度，影响不大。对于位移、速度或加速度的响应水平，我们关注不同的情况。为了控制轨道振动，在其下方设置了石灰水泥柱，起到了阻波屏障的作用，有效地将200 km/h的大响应位移降低到70 km/h的极小水平。为了便于理解轨道和其下土壤的行为，演示了视觉呈现。

项目成果

Takemiya, H.: "Simulation of track-ground vibrations due to high-speed train : The case of x-2000 at Lesdsgard"Journal of Sound and Vibration, Academic Press. 261(3). 503-526

Takemiya, H.：“高速列车引起的轨道地面振动模拟：Lesdsgard 的 x-2000 案例”声音与振动杂志，学术出版社。

竹宮宏和, 前河隆太, 児島基成: "高速列車下の軌道-地盤系の2.5D FEMによる振動評価と制振法の検討"土木学会論文集. 710/I-60. 247-255 (2002)

Hirokazu Takemiya、Ryuta Maekawa、Motonari Kojima：“使用高速列车下轨道地面系统的 2.5D FEM 进行振动评估和阻尼方法研究”日本土木工程师学会论文集 710/I-60。 255（2002）

Hirokazu Takemiya: "Controlling of track -ground vibration due high-speed train by WIB"Eurodyn2002, European Association for Structural Dynamics, Munich. 497-502 (2002)

Hirokazu Takemiya：“通过 WIB 控制高速列车引起的轨道地面振动”Eurodyn2002，欧洲结构动力学协会，慕尼黑。

Takemiya, H. and Shimabuku, J.: "Application of soil-cement columns for better seismic design of bridge piles and mitigation of nearby ground vibration due to traffic"Journal of Structural Engineering. Vol.48A. 437-444 (2002)

Takemiya, H. 和 Shimabuku, J.：“应用水泥土柱进行更好的桥梁桩抗震设计并减轻交通引起的附近地面振动”结构工程杂志。

Jorge Shimabuku and Hirokazu Takemiya: "Inelastic seismic response of bridge pier : Effects of superstructure characteristic and soil layering Structural Eng./Earthquake Eng."Proc. Japan Society of Civil Engineers. Vol.19, No.1. 11s-20s (2002)

Jorge Shimabuku 和 Hirokazu Takemiya：“桥墩的非弹性地震响应：上部结构特性和土壤分层的影响结构工程/地震工程”Proc。