Practical application of AIV analysis methods for screening, qualification, and redesign of complex piping systems

摘要

Fatigue failures due to Acoustic Induced Vibration (AIV) can be dangerous and costly; therefore, an AIV risk assessment is a critical part of the engineering design for piping downstream of high-energy noise sources. This paper presents the application of previous work by Carucci and Mueller, F. L. Eisinger, and the Energy Institute to a complex piping system with over 50 high capacity pressure relief and control valves. In addition, this paper describes the application of a hybrid analysis approach using both the Energy Institute method and finite element analysis (FEA). The integration of FEA into the Energy Institute method was developed by SwRI and is used to evaluate the effectiveness of adding stiffening rings at high-risk welded connections, as qualified by the Energy Institute method. The analysis results show that various design changes may be effective in significantly reducing AIV risk. The strengths and weaknesses of each analysis approach are discussed, as well as practical issues that may affect the piping design modifications.