A free vibration analysis of toroidal composite shells in free space

Tizzi, S.

doi:10.1016/j.jsv.2014.10.015

Cited by 10 publications

(1 citation statement)

References 12 publications

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“…Other toroidal vessel-related concepts such as buckling, stability and vibration behaviour have also been investigated in the literature. Differential quadrature method, which converts differential equations of shells to sets of linear simultaneous equations, has been employed in the stability and vibration analysis of isotropic and orthotropic toroidal shells with uniform and variable thicknesses [39,[64][65][66][67][68][69][70][71][72][73]. This particular sub-topic of toroidal vessels is outside the scope of this study so it will not be elaborated on further.…”

Section: Other Toroidal Vessel-related Researchmentioning

confidence: 99%

A review of toroidal composite pressure vessel optimisation and damage tolerant design for high pressure gaseous fuel storage

Fowler

Orifici

Wang

2016

International Journal of Hydrogen Energy

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On-board high-pressure storage of hydrogen gas and compressed natural gas is critical to the widespread adoption of alternative gaseous fuel to reduce CO 2 emissions in transportation. Cylindrical pressure vessels are the traditional option for on-board gaseous fuel storage; however they possess domed heads that are prone to over-design and a source of manufacturing difficulties. Toroidal composite pressure vessels (CPV) have been recognised as a volumetrically efficient solution that could address these problems, thus reducing vessel mass, while improving storage efficiencies. Currently, there exist many gaps in toroidal CPV research which must be addressed to fully realise the potential of this technology. Herein we present a comprehensive and critical review of the design and optimisation of toroidal CPVs, focusing on damage tolerant design as a key requirement to meet safety standards and optimisation of toroidal cross-sectional profiles (shape, thickness variation and fibre winding pattern) to reduce or eliminate stress non-uniformity. An original analysis of toroidal radius ratio (R/r) influence on the thickness profiles of naturally-thickened and isotensoid circular toroidal CPVs is conducted. It is concluded that a focus on smaller radius ratios (1.25 < R/r < 3) is required to maximise the potential spacesaving and volumetric efficiencies of the torus. Leading international CPV standards are analysed in order to adapt three important design qualification requirements from cylindrical to toroidal structures. Building block approaches are also presented to aid the damage tolerant design of toroidal CPVs for the relevant design qualification tests.

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