Title: Optimisation of nanocomposite pipes under internal fluid reinforced by FRP and CNTs under seismic load

Authors: Behrooz Keshtegar; José A.F.O. Correia; Nguyen-Thoi Trung

Addresses: Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam ' INEGI, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal ' Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Abstract: The optimisation approach can be applied to control the dynamic response of the mechanical problems. The design-based optimisation process can be provided the suitable performances of the complex engineering problem as nanocomposite pipes modelled by Reddy theory. In this work, a hybrid intelligent - analytical optimisation method is applied for maximising the critical velocity under frequency constraint. The adaptive dynamical harmony search (ADHS) is used in the optimisation process while a numerical approach is utilised in analytical process. In optimisation process basis ADHS, the memory is adjusted by a dynamic bandwidth while the best memory is adjusted by utilising normal random generated number. Four design variables are given in this problem as length to radius ratio, thickness to radius ratio, temperature and volume percent of carbon nano tube. The optimisation results for maximising critical velocity are compared for different fluid velocity at two levels of FRP layers of 1 and 2.

Keywords: optimisation; adaptive dynamical harmony search; seismic load; FRP; fluid.

DOI: 10.1504/IJHM.2020.109911

International Journal of Hydromechatronics, 2020 Vol.3 No.3, pp.213 - 227

Received: 21 Oct 2019
Accepted: 13 Nov 2019
Published online: 29 Sep 2020 *

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