Dynamics and stability of pipes conveying fluid
- National Taiwan Univ., Taipei (Taiwan, Province of China). Inst. of Applied Mechanics
- Chung Sun Inst. of Science and Technology, Long Tan (Taiwan, Province of China)
This paper deals with the dynamics and stability of simply supported pipes conveying fluid, where the fluid has a small harmonic component of flow velocity superposed on a constant mean value. The perturbation techniques and the method of averaging are used to convert the nonautonomous system into an autonomous one and determine the stability boundaries. Post-bifurcation analysis is performed for the parametric points in the resonant regions where the axial force, which is induced by the transverse motion of the pipe due to the fixed-span ends and contributes nonlinearities to the equations of motion, is included. For the undamped system, linear analysis is inconclusive about stability and there does not exist nontrivial solution in the resonant regions. For the damped system, it is found that the original stable system remains stable when the pulsating frequency increased cross the stability boundary and becomes unstable when the pulsating frequency decreases across the stability boundary. Practical applications of such a problem are vibrations of heat exchangers, liquid-fuel rocket piping, and nuclear reactor coolant channels.
- OSTI ID:
- 5065467
- Journal Information:
- Journal of Pressure Vessel Technology; (United States), Vol. 116:1; ISSN 0094-9930
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
HEAT EXCHANGERS
PIPES
MECHANICAL VIBRATIONS
REACTOR COOLING SYSTEMS
DAMPING
FLUID FLOW
SUPPORTS
COOLING SYSTEMS
ENERGY SYSTEMS
MECHANICAL STRUCTURES
REACTOR COMPONENTS
220200* - Nuclear Reactor Technology- Components & Accessories
420400 - Engineering- Heat Transfer & Fluid Flow