Flow-induced oscillations of a cantilevered pipe conveying fluid with base excitation

2014 ◽  
Vol 333 (18) ◽  
pp. 4265-4280 ◽  
Author(s):  
Gary Han Chang ◽  
Yahya Modarres-Sadeghi
Keyword(s):  
Pipe Conveying Fluid ◽  
Base Excitation ◽  
Cantilevered Pipe ◽  
Conveying Fluid

Nonlinear Analysis of L-shaped Pipe Conveying Fluid with the Aid of Absolute Nodal Coordinate Formulation

2021 ◽  
Author(s):  
K. Zhou ◽  
H.R. Yi ◽  
Huliang Dai ◽  
H Yan ◽  
Z.L. Guo ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Flow Velocity ◽  
Absolute Nodal Coordinate Formulation ◽  
Strong Relationship ◽  
Excitation Amplitude ◽  
Pipe Conveying Fluid ◽  
Base Excitation ◽  
Absolute Nodal Coordinate ◽  
Nonlinear Behaviors ◽  
Conveying Fluid

Abstract By adopting the absolute nodal coordinate formulation, a novel and general nonlinear theoretical model, which can be applied to solve the dynamics of combined straight-curved fluid-conveying pipes with arbitrary initially configurations and any boundary conditions, is developed in the current study. Based on this established model, the nonlinear behaviors of the cantilevered L-shaped pipe conveying fluid with and without base excitations are systematically investigated. Before starting the research, the developed theoretical model is verified by performing three validation examples. Then, with the aid of this model, the static deformations, linear stability, and nonlinear self-excited vibrations of the L-shaped pipe without the base excitation are determined. It is found that the cantilevered L-shaped pipe suffers from the static deformations when the flow velocity is subcritical, and will undergo the limit-cycle motions as the flow velocity exceeds the critical value. Subsequently, the nonlinear forced vibrations of the pipe with a base excitation are explored. It is indicated that the period-n, quasi-periodic and chaotic responses can be detected for the L-shaped pipe, which has a strong relationship with the flow velocity, excitation amplitude and frequency.

Nonlinear interactions between unstable oscillatory modes in a cantilevered pipe conveying fluid

2019 ◽  
Vol 98 (4) ◽  
pp. 2927-2938 ◽  
Author(s):  
Kiyotaka Yamashita ◽  
Takahiro Yagyu ◽  
Hiroshi Yabuno
Keyword(s):  
Nonlinear Interactions ◽  
Pipe Conveying Fluid ◽  
Cantilevered Pipe ◽  
Conveying Fluid
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