Automatic FE modeler using stiffener-based mesh generation algorithm for ship structural analysis

Shipbuilding industries have started to employ 3D CAD systems to integrate all design and production processes by achieving seamless data transfer and data sharing. The emerging 3D CAD system brings a considerable change in FE analysis field. The availability of 3D geometry increased the recognition...

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Veröffentlicht in:Marine structures Jg. 21; H. 2; S. 294 - 325
Hauptverfasser: Jang, Beom-Seon, Suh, Yong-Suk, Kim, Eun-Ki, Lee, Tae-Hee
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford Elsevier Ltd 01.04.2008
Elsevier
Schlagworte:
Applied sciences
Automatic FE mesh generation
Exact sciences and technology
Geometry idealization
Ground, air and sea transportation, marine construction
Marine construction
Stiffener-based mesh generation algorithm
Automatic FE mesh generation
Geometry idealization
Stiffener-based mesh generation algorithm
Finite element method
Vibrational analysis
Example
Shipbuilding
Mesh method
Algorithm
Modeling
Structural analysis
Stiffener
ISSN:0951-8339, 1873-4170
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Abstract Shipbuilding industries have started to employ 3D CAD systems to integrate all design and production processes by achieving seamless data transfer and data sharing. The emerging 3D CAD system brings a considerable change in FE analysis field. The availability of 3D geometry increased the recognition of the need for developing automatic FE modeling system consequently. However, general automatic mesh algorithms developed by academic research field have a limitation. The difficulty in satisfying lots of line constraints and the absence of proper idealization of 3D geometry entities defined in CAD system hinders directly employing the general mesh algorithms. In this research, an automatic FE modeling system has been developed for cargo hold FE modeling and whole ship FE modeling. The basic concept of the algorithm is to decompose surfaces using stiffener lines into subregions and generate mesh using a rule established based on FE modeling practice of ship structure. Since the decomposed subregions take simple polygon, they can be easily transformed into elements by decomposing the polygon according to the rule defined considering the shape of the polygon and mesh seed on its perimeter. The algorithm is also designed to treat appropriate geometry idealizations for bracket-type surface and stiffener connections. The idealization process is also completely customized based on FE modeling practice. The validity of the developed system is verified through illustrative examples.
AbstractList Shipbuilding industries have started to employ 3D CAD systems to integrate all design and production processes by achieving seamless data transfer and data sharing. The emerging 3D CAD system brings a considerable change in FE analysis field. The availability of 3D geometry increased the recognition of the need for developing automatic FE modeling system consequently. However, general automatic mesh algorithms developed by academic research field have a limitation. The difficulty in satisfying lots of line constraints and the absence of proper idealization of 3D geometry entities defined in CAD system hinders directly employing the general mesh algorithms. In this research, an automatic FE modeling system has been developed for cargo hold FE modeling and whole ship FE modeling. The basic concept of the algorithm is to decompose surfaces using stiffener lines into subregions and generate mesh using a rule established based on FE modeling practice of ship structure. Since the decomposed subregions take simple polygon, they can be easily transformed into elements by decomposing the polygon according to the rule defined considering the shape of the polygon and mesh seed on its perimeter. The algorithm is also designed to treat appropriate geometry idealizations for bracket-type surface and stiffener connections. The idealization process is also completely customized based on FE modeling practice. The validity of the developed system is verified through illustrative examples.
Shipbuilding industries have started to employ 3D CAD systems to integrate all design and production processes by achieving seamless data transfer and data sharing. The emerging 3D CAD system brings a considerable change in FE analysis field. The availability of 3D geometry increased the recognition of the need for developing automatic FE modeling system consequently. However, general automatic mesh algorithms developed by academic research field have a limitation. The difficulty in satisfying lots of line constraints and the absence of proper idealization of 3D geometry entities defined in CAD system hinders directly employing the general mesh algorithms. In this research, an automatic FE modeling system has been developed for cargo hold FE modeling and whole ship FE modeling. The basic concept of the algorithm is to decompose surfaces using stiffener lines into subregions and generate mesh using a rule established based on FE modeling practice of ship structure. Since the decomposed subregions take simple polygon, they can be easily transformed into elements by decomposing the polygon according to the rule defined considering the shape of the polygon and mesh seed on its perimeter. The algorithm is also designed to treat appropriate geometry idealizations for bracket-type surface and stiffener connections. The idealization process is also completely customized based on FE modeling practice. The validity of the developed system is verified through illustrative examples.
Author Jang, Beom-Seon
Suh, Yong-Suk
Lee, Tae-Hee
Kim, Eun-Ki
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  organization: Engineering Service Division, MSC.KOREA, Sungnam-si, Kyungki-do 463-804, Republic of Korea
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Cites_doi 10.1002/nme.1620320410
10.1002/nme.1620290712
10.1002/(SICI)1097-0207(19990330)44:9<1317::AID-NME532>3.0.CO;2-N
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10.1016/0010-4485(95)95870-K
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Issue 2
Keywords Automatic FE mesh generation
Geometry idealization
Stiffener-based mesh generation algorithm
Finite element method
Vibrational analysis
Example
Shipbuilding
Mesh method
Algorithm
Modeling
Structural analysis
Stiffener
Language English
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SubjectTerms Applied sciences
Automatic FE mesh generation
Exact sciences and technology
Geometry idealization
Ground, air and sea transportation, marine construction
Marine construction
Stiffener-based mesh generation algorithm
Title Automatic FE modeler using stiffener-based mesh generation algorithm for ship structural analysis
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