Development of RS Guidelines on finite element analysis of ship hull structures

Authors: A.A. Petrov, E.A. Morozova, A.V. Soklakov, V.A. Suvorov

 

Abstract

 

The paper presents the project for developing a RS normative document on application of the finite element analysis (FEA) method for calculating the stress-strain state of hull structures of the RS-classed ships. Based on the analysis of the current FEA calculation rules of the other classification societies and the existing experience of calculating stress-strain state of vessel structures, guidelines have been proposed with four types of analysis proposed: the global, partial, local and beam-based. For each type of analysis particular requirements for the inclusion of construction elements in the model have been developed along with requirements for the FE mesh and boundary conditions. Criteria for assessing the strength have also been given. The guidelines have been tried out on calculating the strength of the grillage as a beam system and on calculating the strength of a ship (barge) hull under the design wave-impact and ballast loading, as well as under the deck cargo load. The correctness of modeling the hull girder bending under the proposed boundary conditions has been verified by correlation of the values of the shear forces with bending moments obtained by the analytical method and FEA.

 

Keywords: FEA, RMRS guidelines, stress-strain state, direct strength calculations, numerical modelling.

 

References

1.  ABS SafeHull Finite Element Analysis of Hull Structures, 2014.

2. ABS Guide for "SafeHull-Dynamic Loading Approach" for Vessels, 2017.

3. Bureau Veritas Rules for the Classification of Steel Ships Part B - Hull and Stability, 2018.

4. Class guideline - DNVGL-CG-0127 Finite element analysis, 2015.

5. DNV GL Rules for Classification: Ships, 2016.

6. Rules for the Classification and Construction of Sea-Going Ships, RS, 2019. (In Russian)

 

About authors: 

A.A. Petrov - JSC "CNIIMF", St. Petersburg, e-mail: Petrov25@cniimf.ru

E.A. Morozova - JSC "CNIIMF", St. Petersburg, e-mail: MorozovaEA@cniimf.ru

A.V. Soklakov - JSC "CIFRA", St. Petersburg, e-mail: alexander@multiphysics.ru

V.A. Suvorov - JSC "CIFRA", St. Petersburg, e-mail: suvorov1303@mail.ru

Issue: 60/61 (2020)

For citation: A.A. Petrov, E.A. Morozova, A.V. Soklakov, V.A. Suvorov. Development of RS Guidelines on finite element analysis of ship hull structures. Research Bulletin by Russian Maritime Register of Shipping. 2020, No. 60/61, pp. 75-83.

UDC 629.5.04; 624.042

Pp: 75-83