Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects

Song, Wei; Xie, Aoyu; Lu, Yonggang; Zhao, Yun; Wang, Zhengwei

doi:10.3390/w17131864

This is an early access version, the complete PDF, HTML, and XML versions will be available soon.

Open AccessArticle

Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects

by

Wei Song

,

Aoyu Xie

,

Yonggang Lu

,

Yun Zhao

and

Zhengwei Wang

^*

State Key Laboratory of Hydro-Science and Engineering, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

^*

Author to whom correspondence should be addressed.

Water 2025, 17(13), 1864; https://doi.org/10.3390/w17131864

Submission received: 8 May 2025 / Revised: 11 June 2025 / Accepted: 20 June 2025 / Published: 23 June 2025

(This article belongs to the Special Issue Hydrodynamics Science Experiments and Simulations, 2nd Edition)

Download Review Reports Versions Notes

Abstract

This study investigated the acoustic modal characteristics of pump tower structures under fluid–structure coupling effects through a finite element analysis. Compared with the dry condition, filling the internal pipelines with liquid causes the first three natural frequencies to decrease by 17.12%, 16.80%, and 19.50%, respectively, while full external immersion (wet mode) further reduces them by 15.60%, 15.10%, and 5.30%. As the liquid level in the surrounding storage tank increases from 0% to 100%, the first-mode frequency falls from 6.07 Hz to 5.13 Hz (a 15.5% reduction), the second-mode from 14.71 Hz to 12.48 Hz (15.1%), and the third-mode from 19.69 Hz to 18.63 Hz (5.5%). Mode-shape distributions remain qualitatively similar across liquid levels, although local deformation magnitudes decrease by up to 21.0% for the first mode and 18.3% for the second mode. These quantitative findings provide a theoretical and technical basis for predicting dynamic responses of pump tower structures in complex fluid environments.

Keywords: fluid–structure coupling; tower structure; acoustic mode; wet mode; liquid level variation; finite element analysis; mode shape; natural frequency

Share and Cite

MDPI and ACS Style

Song, W.; Xie, A.; Lu, Y.; Zhao, Y.; Wang, Z. Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects. Water 2025, 17, 1864. https://doi.org/10.3390/w17131864

AMA Style

Song W, Xie A, Lu Y, Zhao Y, Wang Z. Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects. Water. 2025; 17(13):1864. https://doi.org/10.3390/w17131864

Chicago/Turabian Style

Song, Wei, Aoyu Xie, Yonggang Lu, Yun Zhao, and Zhengwei Wang. 2025. "Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects" Water 17, no. 13: 1864. https://doi.org/10.3390/w17131864

APA Style

Song, W., Xie, A., Lu, Y., Zhao, Y., & Wang, Z. (2025). Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects. Water, 17(13), 1864. https://doi.org/10.3390/w17131864

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

Acoustic Modal Characteristics of Pump Tower Structures Based on Fluid–Structure Coupling Effects

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI