Open AccessNumerical Analysis of Pipeline Vibration Characteristics in Large Pumping Stations
Author(s) -
ChongYu Xu,
Jing Tian,
Zhou Dongmeng,
Yao Zhipeng,
Fengyou Gu,
Peng Zhang
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/4/042072
Subject(s) - vibration , pipeline (software) , structural engineering , computer simulation , displacement (psychology) , normal mode , deformation (meteorology) , modal analysis , cascade , reduction (mathematics) , engineering , computer science , finite element method , mechanical engineering , acoustics , simulation , geology , physics , psychology , oceanography , geometry , mathematics , chemical engineering , psychotherapist
This paper focuses on the high frequency vibration of the pipeline structure during operation of the large cascade pumping station. In order to explore its causes and inherent vibration characteristics, this paper takes #1 pressure pipeline of No.7 pump of Gansu Province Jingdian Project as the research object. The principle of additional mass method is used to establish a simplified fluid-solid coupling simulation model, and then the model is used to carry out numerical simulation test on the pipeline under different unit opening and closing conditions. After analyzing the numerical results of the simulation, the vibration mode and displacement deformation law are discovered and compared with the DASP field monitoring results. The results show that: under four representative working conditions, the vibration deformation of the pressure pipeline mainly occurs in the elbow section and the connecting section of the large and small tubes; the amplitude of the vibration mode increases with the increase of the modal order; furthermore, the water outlet pipe that is not easily vibrated in the high-order mode is gradually vibrated and deformed; in addition, the numerical simulation results are in good agreement with the field test results. This research can provide reference for the optimization design of pipeline vibration isolation and vibration reduction, and also provide a theoretical basis for the subsequent research on pipeline structural damage diagnosis and its safe operation.