Analysis of Planar Motion for Curved Pipe Conveying Fluid with Different Types of Initial Configuration

2021 ◽  
Author(s):  
Li Yun-dong ◽  
Sun Ze-gang
Keyword(s):  
Initial Configuration ◽  
Planar Motion ◽  
Pipe Conveying Fluid ◽  
Curved Pipe ◽  
Different Types ◽  
Conveying Fluid

scholarly journals The inside view of an oscillating pipe

2016 ◽  
Vol 808 ◽  
pp. 1-4
Author(s):  
Yahya Modarres-Sadeghi
Keyword(s):  
Nonlinear Dynamics ◽  
Model Problem ◽  
Theoretical Studies ◽  
Pipe Conveying Fluid ◽  
Fluid Structure Interactions ◽  
Routes To Chaos ◽  
Different Types ◽  
Inside View ◽  
Experimental And Theoretical Studies ◽  
Conveying Fluid

A pipe conveying fluid is a model problem in fluid–structure interactions and nonlinear dynamics. Several experimental and theoretical studies exist on this problem and very rich nonlinear dynamics have been observed including super- and subcritical instabilities as well as various routes to chaos. Despite all the existing studies, we had not yet seen the fluid inside an oscillating pipe as the pipe undergoes different types of flow-induced instabilities. But the wait is over.

scholarly journals The Resonance Reliability and Global Sensitivity Analysis of Curved Pipe Conveying Fluid Based on TIS Method

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Zhao Yuzhen ◽  
Liu Yongshou ◽  
Guo Qing ◽  
Li Baohui
Keyword(s):  
Sensitivity Analysis ◽  
Natural Frequency ◽  
Global Sensitivity Analysis ◽  
Beam Theory ◽  
Reliability Estimation ◽  
Pipe Conveying Fluid ◽  
Curved Pipe ◽  
Global Sensitivity ◽  
Curved Pipes ◽  
Conveying Fluid

Based on the Flügge curved beam theory and total inextensible assumption, the dynamic equations of curved pipe’s in-plane vibration are established using the Newton method. The wave propagation method is proposed for calculating the natural frequency of curved pipes with clamped-clamped supported at both ends. Then, the performance function of the resonance reliability of curved pipe conveying fluid is established. Main and total effect indices of global sensitivity analysis (GSA) are introduced. The truncated importance sampling (TIS) method is used for calculating these indices. In the example, the natural frequency and critical velocity of a semicircular pipe are calculated. The importance ranking of input variables is obtained at different working conditions. The method proposed in this paper is valuable and leads to reliability estimation and antiresonance design of curved pipe conveying fluid.

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