Abstract:In this paper, the parameter sensitivity and resonance reliability for fluid-filled pipeline is studied. Considering the fluid-structure interaction(FSI), using FEM software, a fluid-filled pipeline system is modeled and the system’s modal is analyzed. Then, random distribution pattern of the pipe’s structure parameter are given, and the probability distribution of the first and second modal are analyzed, and the influences between these parameters and the pipeline system’s natural frequency sensitivity are also discussed. Finally, the interference theory is used to process the FSI pipeline system’s anti -resonance reliability analysis. The results in this paper can be help in anti -resonance design and reliability estimation of fluid-filled pipelines.