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<p>Forced vibration testing was performed on a 6:1 scaled foundation model to capture dynamic responses under excitation loads. This experimental approach validated the accuracy of numerical simulations in characterizing the dynamic behavior of heavy-duty gas turbine block foundations. In this model test, a frame structure was employed for the first time to simulate the horizontal and vertical stiffness of piles. The test results demonstrated that this simulation method for piles exhibited satisfactory reliability. An equivalent excitation method was adopted to replicate unbalanced loads from turbine generator set, and experimental results validated the accuracy of the numerical simulations. A simplified setup was designed to investigate the influence of equipment stiffness on foundation dynamics, revealing that equipment's inherent resonance under dynamic loads significantly amplifies foundation responses, highlighting the necessity to address such coupling effects during foundation design.</p>

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Dynamic Characteristics Testing and Numerical Analysis of a Combustion Turbine Generator Foundation Model

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • X. H. Sun,
  • W. Z. Mi,
  • S. J. Chen,
  • J. X. Xu,
  • B. Zhang,
  • F. Y. Xia,
  • C. Y. Zhou

摘要

Forced vibration testing was performed on a 6:1 scaled foundation model to capture dynamic responses under excitation loads. This experimental approach validated the accuracy of numerical simulations in characterizing the dynamic behavior of heavy-duty gas turbine block foundations. In this model test, a frame structure was employed for the first time to simulate the horizontal and vertical stiffness of piles. The test results demonstrated that this simulation method for piles exhibited satisfactory reliability. An equivalent excitation method was adopted to replicate unbalanced loads from turbine generator set, and experimental results validated the accuracy of the numerical simulations. A simplified setup was designed to investigate the influence of equipment stiffness on foundation dynamics, revealing that equipment's inherent resonance under dynamic loads significantly amplifies foundation responses, highlighting the necessity to address such coupling effects during foundation design.