The Effect of Plasticity on Resonant Pipe Vibration

Abstract

An understanding of the response of pipework systems to high levels of seismic excitation is required to enable aseismic design methods to be securely based. Theoretical and experimental modeling of simple systems and components demonstrate that plasticity in the pipe wall controls the vibration response level and that, because of an unexpected level of material strain hardening, in pressurized pipes, simple elastic modal and frequency analysis are satisfactory. Given the correct material properties an energy balance approach correctly predicts the steady.