부가질량을 갖고 유동유체에 의한 송수관의 동적 안정성에 관한 실험적 검증

Experimental Verification on Dynamic Stability of a Pipe with Attached Masses Conveying Fluid

The paper presents both theoretical and experimental study for dynamic instabilities of a vertical cantilevered pipe with two attached lumped masses conveying fluid. The two attached lumped masses can be considered as valves or some mechanical parts in real pipe system. Eigenvalue behaviors depending on the flow velocity are investigated for the change of positions and magnitudes of an attached lumped mass and a tip mass. In order to verify appropriaty of numerical solutions, experiments were accomplished. Theoretical predictions have a good agreement with experimental ones.