The objective of this study is to investigate the variation of neutral axis of ship hull girder due to asymmetric geometry or asymmetric load, and its influence on the ultimate strength (ULS) of hull girder. In order to account for asymmetric geometries and loads of hull girders, the force equilibrium and force-vector equilibrium criteria together with a minimum convergence factors (error) method are employed to determine the translation and rotation of neutral axis plane (NAP) of symmetric or asymmetric hull cross section in the application of Smith's method at each step of curvature of the hull girder. The ULSs of Dow's 1/3 frigate model with three predefined structural integrity states, one intact and two damaged, respectively, is investigated by the improved Smith's method (ISM) for a range of variation of heeling angles. The influence of asymmetric geometry and load on the motion of NAP and on the ULS are analyzed and discussed. The results show that the improved iteration strategy together with the minimum convergence factors (error) method is efficient and more accurate in searching the translation and rotation of NAP. Finally, the envelope curves of the bending moments in the three predefined integrity states are obtained, which can be used for assessing ULS of hull girders under combined vertical and horizontal wave bending moments.
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December 2018
Research-Article
Ultimate Bearing Capacity Assessment of Hull Girder With Asymmetric Cross Section
Chenfeng Li,
Chenfeng Li
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: lichenfeng@hrbeu.edu.cn
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: lichenfeng@hrbeu.edu.cn
Search for other works by this author on:
Peng Fu,
Peng Fu
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: fupeng@hrbeu.edu.cn
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: fupeng@hrbeu.edu.cn
Search for other works by this author on:
Huilong Ren,
Huilong Ren
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: renhuilong@263.net
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: renhuilong@263.net
Search for other works by this author on:
Weijun Xu,
Weijun Xu
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: xuweijun@hrbeu.edu.cn
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: xuweijun@hrbeu.edu.cn
Search for other works by this author on:
C. Guedes Soares
C. Guedes Soares
Fellow ASME
Centre for Marine Technology and
Ocean Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
Lisboa 1049-001, Portugal
e-mail: c.guedes.soares@centec.tecnico.ulisboa.pt
Centre for Marine Technology and
Ocean Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
No. 1, Av. Rovisco Pais
,Lisboa 1049-001, Portugal
e-mail: c.guedes.soares@centec.tecnico.ulisboa.pt
Search for other works by this author on:
Chenfeng Li
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: lichenfeng@hrbeu.edu.cn
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: lichenfeng@hrbeu.edu.cn
Peng Fu
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: fupeng@hrbeu.edu.cn
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: fupeng@hrbeu.edu.cn
Huilong Ren
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: renhuilong@263.net
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: renhuilong@263.net
Weijun Xu
College of Shipbuilding Engineering,
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: xuweijun@hrbeu.edu.cn
Harbin Engineering University,
No. 145, Nantong Street,
Nangang District,
Harbin 150001, Heilongjiang Province, China
e-mail: xuweijun@hrbeu.edu.cn
C. Guedes Soares
Fellow ASME
Centre for Marine Technology and
Ocean Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
Lisboa 1049-001, Portugal
e-mail: c.guedes.soares@centec.tecnico.ulisboa.pt
Centre for Marine Technology and
Ocean Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
No. 1, Av. Rovisco Pais
,Lisboa 1049-001, Portugal
e-mail: c.guedes.soares@centec.tecnico.ulisboa.pt
1Corresponding author.
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received October 5, 2017; final manuscript received June 26, 2018; published online September 12, 2018. Assoc. Editor: Myung Hyun Kim.
J. Offshore Mech. Arct. Eng. Dec 2018, 140(6): 061103 (9 pages)
Published Online: September 12, 2018
Article history
Received:
October 5, 2017
Revised:
June 26, 2018
Citation
Li, C., Fu, P., Ren, H., Xu, W., and Guedes Soares, C. (September 12, 2018). "Ultimate Bearing Capacity Assessment of Hull Girder With Asymmetric Cross Section." ASME. J. Offshore Mech. Arct. Eng. December 2018; 140(6): 061103. https://doi.org/10.1115/1.4040720
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