Title: Seismic hydro-dynamic analysis of pipes with internal and external fluid under nanoparticles as reinforcement phase

Authors: Mansour Bagheri; Grzegorz Lesiuk; José António Fonseca De Oliveira Correia

Addresses: Department of Civil Engineering, Birjand University of Technology, P.B. 9719866981, Birjand, Iran ' Department of Mechanics, Materials and Biomedical Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland ' Faculty of Engineering, INEGI, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal

Abstract: One of the essential subjects for the pipeline in the sea is the existence of many earthquakes in the sea, and hence, the dynamic deflection of these structures is essential. Hydro-dynamic analysis of nanocomposite pipes with internal and external fluid is presented. The system is under the earthquake dynamic load and the final equations of are obtained utilising mathematical formulation with classic theory of shell and principle of Hamilton. Navier-Stokes relation is applied to obtain the internal and external fluid forces. Mori-Tanaka approach is utilised to calculate the effective characteristics of the pipe. The dynamic deflection is calculated utilising Newmark and differential quadrature method (DQM). The influences of different variables of nanoparticles volume fraction, boundary conditions, length to radius ratios, external and internal fluid are presented on the dynamic displacement of the system. From outcomes, it may be found that the dynamic displacement is enhanced in the existence of external and internal fluid. In addition, utilising nanoparticles in pipe decreases the dynamic displacement.

Keywords: hydrodynamic analysis; pipes; earthquake; internal and external fluid; fluid.

DOI: 10.1504/IJHM.2020.109917

International Journal of Hydromechatronics, 2020 Vol.3 No.3, pp.252 - 267

Received: 09 Nov 2019
Accepted: 08 Jan 2020
Published online: 29 Sep 2020 *

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