Flow induced vibration investigation of a main steam pipe suffering from high temperature steam flow

2022 
Abstract In this paper we devoted to evaluate the responses of a main steam pipe subjected to the steam flow by computational fluid dynamics and spectrum analysis. A fluid model was established to find the periodic fluid force excitation resulting from vortex shedding, the frequency characteristics of the exciting force was examined via Fast Fourier Transform. Based on the spectrum method, a structure model was built to extract the natural frequencies and the responses. The results conveyed that the resonance was unlikely to appear because the natural frequencies of the main steam pipe were one order of magnitude higher than the dominant frequencies of the fluid excitation. Moreover, the stress amplitude of the main steam pipe was observed to be 22.4 MPa, which was much lower than the stress limitation of fatigue and it was assured that no fatigue failure would arise during service life according to the ASME relevant standard.
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    15
    References
    0
    Citations
    NaN
    KQI
    []