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<p>This study focuses on the dynamic coupling effect of “dam body—water body – foundation” of embankment dams under vehicle loads, and constructs a three-dimensional refined finite element model to analyze its vibration transmission mechanism. The effectiveness is verified by combining the improved variational Mode Decomposition (DVMD) algorithm and introducing the vibration transfer entropy index. The vibration transfer relationship between key nodes is analyzed to systematically evaluate the vibration response characteristics under vehicle loads. The research shows that the finite element simulation results are highly consistent with the main frequency and energy concentration interval calculated by the DVMD algorithm, and the maximum relative error is only 1.50%.The vibration energy of the dam body attenuates gradientially in all directions with the vehicle’s domain as the core, and the differences in the transfer entropy and information transfer rate between adjacent feature points decrease gradientially. The maximum influence range of the dynamic response along the axial direction of the dam, the upstream and downstream dam surfaces, and the longitudinal direction reaches 6.08&#xa0;m, 8.81&#xa0;m, 6.87&#xa0;m, and 1.31&#xa0;m respectively. The analysis of the vibration transfer function shows that the high-frequency vibration energy presents a significant directional conduction characteristic. Combined with the attenuation law of transfer entropy, it further reveals that the intensity of information interaction between adjacent nodes decreases with the increase of distance. The research results have accurately identified the key paths of vibration transmission in embankment dams, providing a quantitative theoretical basis for the dynamic safety monitoring and stability control of dams.</p>

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Analysis of vibration transmission path and influence range of embankment dam structure under vehicle load

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Jianwei Zhang,
  • Zhirui Li,
  • Qi Jiang,
  • Jinlin Huang,
  • Hongze Liu,
  • Jiangyu Zhao

摘要

This study focuses on the dynamic coupling effect of “dam body—water body – foundation” of embankment dams under vehicle loads, and constructs a three-dimensional refined finite element model to analyze its vibration transmission mechanism. The effectiveness is verified by combining the improved variational Mode Decomposition (DVMD) algorithm and introducing the vibration transfer entropy index. The vibration transfer relationship between key nodes is analyzed to systematically evaluate the vibration response characteristics under vehicle loads. The research shows that the finite element simulation results are highly consistent with the main frequency and energy concentration interval calculated by the DVMD algorithm, and the maximum relative error is only 1.50%.The vibration energy of the dam body attenuates gradientially in all directions with the vehicle’s domain as the core, and the differences in the transfer entropy and information transfer rate between adjacent feature points decrease gradientially. The maximum influence range of the dynamic response along the axial direction of the dam, the upstream and downstream dam surfaces, and the longitudinal direction reaches 6.08 m, 8.81 m, 6.87 m, and 1.31 m respectively. The analysis of the vibration transfer function shows that the high-frequency vibration energy presents a significant directional conduction characteristic. Combined with the attenuation law of transfer entropy, it further reveals that the intensity of information interaction between adjacent nodes decreases with the increase of distance. The research results have accurately identified the key paths of vibration transmission in embankment dams, providing a quantitative theoretical basis for the dynamic safety monitoring and stability control of dams.