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Partial safety factor approach to the design of submarine pressure hulls using nonlinear finite element analysis. / Mackay, JR; van Keulen, F.

In: Finite Elements in Analysis and Design, Vol. 65, 2012, p. 1-16.

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@article{c6dc9fc9c85a491aab8899f0d35326dd,
title = "Partial safety factor approach to the design of submarine pressure hulls using nonlinear finite element analysis",
abstract = "A framework for the design of submarine pressure hulls using nonlinear finite element (FE) analysis is presented in order to improve upon the conventional analytical-empirical design procedure. A numerical methodology is established that allows the collapse pressure of a hull to be predicted with controlled accuracy. The methodology is characterized by quasi-static incremental analysis, including material and geometric nonlinearities, of FE models constructed from shell elements. The numerical methodology is used with ANSYS to predict the results of 47 collapse experiments on small-scale ring-stiffened cylinders representative of submarine hulls. A probabilistic analysis is applied to the experimental- numerical comparisons in order to estimate the accuracy of the FE methodology and derive a partial safety factor (PSF) for design. It is demonstrated that a high level of accuracy, within 10{\%} with 95{\%} confidence, can be achieved if the prescribed FE methodology is followed. Furthermore, it is shown that the PSF for design does not need to be very large, even if a high degree of statistical confidence is built in. The designer can be 99.5{\%} confident that the FE error has been accounted for by dividing the predicted collapse pressure by a PSF=1.134. Keywords: Submarine pressure hull; Shell buckling; Collapse; Nonlinear finite element analysis; Design; Partial safety factor; Verification and validation.",
keywords = "academic journal papers, CWTS JFIS < 0.75",
author = "JR Mackay and {van Keulen}, F",
year = "2012",
language = "English",
volume = "65",
pages = "1--16",
journal = "Finite Elements in Analysis and Design",
issn = "0168-874X",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Partial safety factor approach to the design of submarine pressure hulls using nonlinear finite element analysis

AU - Mackay, JR

AU - van Keulen, F

PY - 2012

Y1 - 2012

N2 - A framework for the design of submarine pressure hulls using nonlinear finite element (FE) analysis is presented in order to improve upon the conventional analytical-empirical design procedure. A numerical methodology is established that allows the collapse pressure of a hull to be predicted with controlled accuracy. The methodology is characterized by quasi-static incremental analysis, including material and geometric nonlinearities, of FE models constructed from shell elements. The numerical methodology is used with ANSYS to predict the results of 47 collapse experiments on small-scale ring-stiffened cylinders representative of submarine hulls. A probabilistic analysis is applied to the experimental- numerical comparisons in order to estimate the accuracy of the FE methodology and derive a partial safety factor (PSF) for design. It is demonstrated that a high level of accuracy, within 10% with 95% confidence, can be achieved if the prescribed FE methodology is followed. Furthermore, it is shown that the PSF for design does not need to be very large, even if a high degree of statistical confidence is built in. The designer can be 99.5% confident that the FE error has been accounted for by dividing the predicted collapse pressure by a PSF=1.134. Keywords: Submarine pressure hull; Shell buckling; Collapse; Nonlinear finite element analysis; Design; Partial safety factor; Verification and validation.

AB - A framework for the design of submarine pressure hulls using nonlinear finite element (FE) analysis is presented in order to improve upon the conventional analytical-empirical design procedure. A numerical methodology is established that allows the collapse pressure of a hull to be predicted with controlled accuracy. The methodology is characterized by quasi-static incremental analysis, including material and geometric nonlinearities, of FE models constructed from shell elements. The numerical methodology is used with ANSYS to predict the results of 47 collapse experiments on small-scale ring-stiffened cylinders representative of submarine hulls. A probabilistic analysis is applied to the experimental- numerical comparisons in order to estimate the accuracy of the FE methodology and derive a partial safety factor (PSF) for design. It is demonstrated that a high level of accuracy, within 10% with 95% confidence, can be achieved if the prescribed FE methodology is followed. Furthermore, it is shown that the PSF for design does not need to be very large, even if a high degree of statistical confidence is built in. The designer can be 99.5% confident that the FE error has been accounted for by dividing the predicted collapse pressure by a PSF=1.134. Keywords: Submarine pressure hull; Shell buckling; Collapse; Nonlinear finite element analysis; Design; Partial safety factor; Verification and validation.

KW - academic journal papers

KW - CWTS JFIS < 0.75

M3 - Article

VL - 65

SP - 1

EP - 16

JO - Finite Elements in Analysis and Design

T2 - Finite Elements in Analysis and Design

JF - Finite Elements in Analysis and Design

SN - 0168-874X

ER -

ID: 3662243