Research on Vibration Characteristics of Powerhouse Structure of Variable Speed Unit Section in Fengning Pumped Storage Power Station

Guoqing Liu, Lianghua Xu, Xin Jia, Chunlei Wei

2024

Abstract

Taking the powerhouse of 12# variable speed unit section in Fengning pumped storage power station as a research object, a three-dimensional finite element model of the powerhouse structure was established. Firstly, the modal analysis method was used to calculate and research the natural vibration characteristics of whole and local structures of the powerhouse. Then, based on the field measured pressure pulsation data, the vibration responses of the powerhouse structure were simulated under the action of hydraulic vibration source. And referring to the relevant vibration control standard of powerhouse, the vibration responses of the powerhouse were analyzed and evaluated. The results show that the top 20 natural frequencies of the whole structure of the powerhouse range from 13.71 to 34.00 Hz, and the top 3 vibration modes are mainly the whole vibration of the structure above the volute layer. The calculation values of natural frequencies of the busbar floor and pillars are not significantly different from the measured values, indicating that the establishment of the calculation model and the setting of the boundary conditions are reasonable and effective. The maximum vibration responses of local structures of the powerhouse meet the vibration control standard of powerhouse under pumping and generating conditions.

Paper Citation

in Harvard Style

Liu G., Xu L., Jia X. and Wei C. (2024). Research on Vibration Characteristics of Powerhouse Structure of Variable Speed Unit Section in Fengning Pumped Storage Power Station. In Proceedings of the 7th International Conference on Environmental Science and Civil Engineering - Volume 1: ICESCE; ISBN 978-989-758-764-1, SciTePress, pages 31-36. DOI: 10.5220/0013573000004671

in Bibtex Style

@conference{icesce24,
author={Guoqing Liu and Lianghua Xu and Xin Jia and Chunlei Wei},
title={Research on Vibration Characteristics of Powerhouse Structure of Variable Speed Unit Section in Fengning Pumped Storage Power Station},
booktitle={Proceedings of the 7th International Conference on Environmental Science and Civil Engineering - Volume 1: ICESCE},
year={2024},
pages={31-36},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013573000004671},
isbn={978-989-758-764-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 7th International Conference on Environmental Science and Civil Engineering - Volume 1: ICESCE
TI - Research on Vibration Characteristics of Powerhouse Structure of Variable Speed Unit Section in Fengning Pumped Storage Power Station
SN - 978-989-758-764-1
AU - Liu G.
AU - Xu L.
AU - Jia X.
AU - Wei C.
PY - 2024
SP - 31
EP - 36
DO - 10.5220/0013573000004671
PB - SciTePress