Extension of the string-on-foundation method to study the shock wave response of an immersed cylinder

Brochard, Kévin; Sourne, Hervé Le; Barras, Guillaume

doi:10.1016/j.ijimpeng.2018.03.007

Cited by 12 publications

(6 citation statements)

References 18 publications

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“…The former effect can be associated to an additional pressure created during the plate deceleration phase while the latter should be accounted for when the total pressure in the fluid drops below the vapor pressure. Nevertheless, due to the simplicity and effectiveness of Taylor's solutions, there have been many research efforts in the past that used Taylor's FSI formulations to idealize the underwater blast as an impulsive loading, for example, (Hutchinson and Xue 2005;Brochard et al 2018Brochard et al , 2020. The authors have also applied a similar approach by dividing the FSI response stages into two: early-time and long-time stages, see (Sone Oo et al 2019).…”

Section: Nomenclaturementioning

confidence: 99%

A coupled closed-form/Doubly Asymptotic Approximation approach for the response of orthotropic plates subjected to an underwater explosion

Sourne

Dorival

2021

Ships and Offshore Structures

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In this paper, a closed-form analytical solution procedure is proposed to solve the coupled fluid-structure interaction (FSI) equations that involve the first-order Doubly Asymptotic Approximation (DAA1) formulation. An efficient method comprised of the nonstandard finite difference (NSFD) scheme is applied. First of all, analytical equations are developed to analyze the response of a rigid mass-spring oscillator in an air-backed condition when it is subjected to a plane shock exponential wave coming from a far-field underwater explosion. After validating the results with LS-DYNA/USA (DAA1), these equations are extended to determine the response of a two-dimensional, simply-supported rectangular plate, and then tested on the isotropic and orthotropic plates within a small deflection regime. Parametric studies are also performed by varying the load decay times, peak pressures, as well as the aspect ratios of the plate. Finally, the advantages and limitations of the proposed formulae are exposed along with suggestions for the future work.

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Section: Nomenclaturementioning

confidence: 99%

A coupled closed-form/Doubly Asymptotic Approximation approach for the response of orthotropic plates subjected to an underwater explosion

Sourne

Dorival

2021

Ships and Offshore Structures

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“…(Hoo Fatt and Sirivolu 2017) extended the approach of Taylor to a 2D deformable plate in both air and water-backed conditions. (Brochard et al 2018(Brochard et al , 2020Sone Oo et al 2019) considered a two-step approach: in step I, the underwater blast is idealized as an impulsive loading to account for the early-time response while in step II, the water-added mass is considered as an additional pressure load. However, (Sone Oo et al 2020), based on various case studies, later pointed out that the impulse-based approach using Taylor's 1D theory is valid only for a certain range of FSI parameter.…”

Section: Underwater Explosionmentioning

confidence: 99%

Response of composite plates in air-backed and water-backed conditions subjected to a far-field underwater explosion

Oo¹,

Sourne²,

Dorival³

2021

Developments in the Analysis and Design of Marine Structures

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“…In this paper, a simplified analytical solution is developed to predict the response of simply-supported, air-backed composite rectangular plates subjected to a plane shock wave. Derivations are done by following the two-step impulse-based approach analogous to the work of Brochard et al [21].…”

Section: Review Of Theoretical and Numerical Workmentioning

confidence: 99%

“…A plane shock pressure wave is applied uniformly to the entire plate on the fluid side. Following the approach of Brochard et al [21], the interaction between fluid and structure is divided into two phases. In the first phase, the impulsive velocity transmitted to the plate is determined by using Taylor's 1D FSI theory [10].…”

Section: Analytical Fsi Modelmentioning

confidence: 99%

On the applicability of Taylor’s theory to the underwater blast response of composite plates

Sourne

Dorival

2020

International Journal of Impact Engineering

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The response of a plane, air-backed plate attached to a rigid baffle when subjected to an underwater plane shock wave is investigated numerically and analytically. The numerical simulation takes into account a full three-dimensional fluid model involving water cavitation effects. Different numerical models are employed and validated by comparing against various experimental results from the literature. The validated numerical setup is then used to simulate the underwater shock response of simply-supported, air-backed, carbon-fiber/epoxy rectangular plates attached to a rigid baffle. Simplified analytical solution is developed based on two-step approach. The two stages considered are earlytime phase that adapts Taylor's fluid-structure theory to calculate an impulsive velocity for the plate and long-time phase that involves determining its free oscillation response within linear elastic domain, taking into account the water-added mass effect. Finally, the applicability of the proposed method is investigated by performing different numerical simulations regarding various combinations of peak pressures and decay times, change of aspect ratios, change of materials as well as ply orientations.

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Extension of the string-on-foundation method to study the shock wave response of an immersed cylinder

Cited by 12 publications

References 18 publications

A coupled closed-form/Doubly Asymptotic Approximation approach for the response of orthotropic plates subjected to an underwater explosion

A coupled closed-form/Doubly Asymptotic Approximation approach for the response of orthotropic plates subjected to an underwater explosion

Response of composite plates in air-backed and water-backed conditions subjected to a far-field underwater explosion

On the applicability of Taylor’s theory to the underwater blast response of composite plates

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