抄録
In process plants, piping systems for gas services with high rate pressure reducing devices have a potential risk of acoustically induced vibration, resulting in material fatigue falure. To investigate the mechanism of acoustically induced vibration and to establish the method to predict the dynamic stress level in the piping structure, field experiment and numerical simulation using sound-structure interaction analysis were performed. The empirical data shows the effect of circumferential vibration modes, and the comparison between the results of experiment and numerical simulation gave the validity of the sound-structure interaction analysis. By using the sound pressure level estimated by the process condition and the result of sound-structure interaction analysis, quantitative evaluation of the piping dynamic response to flow induced noise can be done.
