DYNAMICS ANALYSIS OF PIPE CONVEYING FLUID WITH AXIAL AND ROTATIONAL MOTION

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HEYDARI HADI; GHAZAVI MOHAMMAD REZA; NAJAFI ASGHAR

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:9 Page(s): 387-393

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Title

DYNAMICS ANALYSIS OF PIPE CONVEYING FLUID WITH AXIAL AND ROTATIONAL MOTION

Author(s)

HEYDARI HADI | GHAZAVI MOHAMMAD REZA | NAJAFI ASGHAR | Issue Writer Certificate

Keywords

GALERKIN’S METHODQ2

CRITICAL SPEEDQ2

CONTROL PARAMETERQ1

BIFURCATION DIAGRAMQ1

POINCARE PORTRAITQ2

Abstract

Dynamics analysis of the rotational axially moving pipe conveying fluid under simply supported condition was investigated in this research. The pipe was assumed as Euler Bernoulli beam. The gyroscopic force and mass eccentricity were considered in the research. Equations of motion were derived using Hamilton’s principle, resulting in two partial differential equations for the transverse motions. The non-dimensional equations were discretized via GALERKIN’S METHOD and were solved using Rung Kutta method (order 15s). The frequency response curve obtained in terms of non-dimensional rotational speed. The BIFURCATION DIAGRAMs obtained in the case that the non-dimensional fluid speed, non-dimensional axial speed and non-dimensional rotational speed respectively varied and the dynamic behavior was numerically investigated based on the Poincare' portrait. Numerical simulations indicated that the system response increases by increasing non-dimensional axial speed of the pipe, nondimensional fluid speed and non-dimensional rotational speed of the pipe and then decreases after passing critical area. The system is unstable at critical point associated with non-dimensional axial speed. POINCARE PORTRAIT indicates periodic motion in transverse vibrations of the pipe at some points of CONTROL PARAMETERs. Phase portrait and FFT (Fast Fourier Transform) diagrams were used for validation of the results.

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APA: Copy

HEYDARI, HADI, GHAZAVI, MOHAMMAD REZA, & NAJAFI, ASGHAR. (2016). DYNAMICS ANALYSIS OF PIPE CONVEYING FLUID WITH AXIAL AND ROTATIONAL MOTION. MODARES MECHANICAL ENGINEERING, 16(9), 387-393. SID. https://sid.ir/paper/179770/en

Vancouver: Copy

HEYDARI HADI, GHAZAVI MOHAMMAD REZA, NAJAFI ASGHAR. DYNAMICS ANALYSIS OF PIPE CONVEYING FLUID WITH AXIAL AND ROTATIONAL MOTION. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(9):387-393. Available from: https://sid.ir/paper/179770/en

IEEE: Copy

HADI HEYDARI, MOHAMMAD REZA GHAZAVI, and ASGHAR NAJAFI, “DYNAMICS ANALYSIS OF PIPE CONVEYING FLUID WITH AXIAL AND ROTATIONAL MOTION,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 9, pp. 387–393, 2016, [Online]. Available: https://sid.ir/paper/179770/en

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