Bibliographic Details
| Title: |
Coupled Stiffness Effects of the Turbine-Generator–Foundation–Pile System on Foundation Dynamic Response. |
| Authors: |
Geng, Y. J.1 (AUTHOR), Li, C.1 (AUTHOR), Chen, S. J.2 (AUTHOR) chensj@sjtu.edu.cn, Liu, J. J.2 (AUTHOR) |
| Source: |
Strength of Materials. Jan2026, Vol. 58 Issue 1, p112-120. 9p. |
| Subjects: |
Turbine generators, Building foundations, Mechanical vibration research, Structural optimization, Finite element method, Stiffness (Mechanics), Vibration (Mechanics), Steam-turbines |
| Abstract: |
As the core equipment in thermal power generation, the dynamic response of turbine generator foundations directly affects the safe and stable operation of the units. Although existing studies have recognized the influence of turbine generator stiffness, foundation stiffness, and pile stiffness on the dynamic characteristics of the system, quantitative analysis of the coupling effects among these three components remains insufficient. Based on the ABAQUS platform, this paper establishes refined finite element models that consider the coupling interaction among the turbine generator, foundation, and pile system. The study systematically investigates the impact of different stiffness simplification methods on the dynamic response of the foundation. The results demonstrate that neglecting turbinegenerator stiffness leads to a severe underestimation of high-frequency vibration responses, with maximum discrepancies reaching 5–10 times. Differences in foundation structural stiffness (e.g., block-type vs. frame-type foundations) significantly affect the natural frequencies and resonance behaviors of the system, resulting in response variations of over two times. The coupled mass and stiffness effects of the pile-soil system cannot be ignored. Simplifying the pile and soil using spring elements alone may overlook critical resonance frequencies, leading to nearly twofold deviations in response peaks. This paper ultimately proposes the adoption of a multi-disciplinary collaborative modeling approach during the design phase to achieve integrated dynamic analysis and optimization of the turbine generator-foundation-pile system. The findings provide theoretical foundations and practical guidance for the safe, economical, and reliable design of next-generation ultra-large turbine generator foundations. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
