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The research on ultimate strength of SWATH under combined loads is important to ensure its safety. In the present research, nonlinear finite element method is adopted to investigate progressive collapse behaviour of a SWATH model under transverse bending moment, longitudinal torsional moment and combined moments. The interaction of transverse bending moment and longitudinal torsional moment is considered. Ultimate capacity under combined moments with different ratio is researched and discussed. In addition, the influence of loading path on ultimate strength is also analyzed. The interaction between transverse bending moment and longitudinal torsional moment is relatively weak, and so the loading sequence in SWATH. [ABSTRACT FROM AUTHOR]

The article discusses research which analyzed the design of a flat-type river-sea-going multi-purpose ship. Topics discussed include the key technologies of safety, energy saving and green ship for flat-type and shallow draft ship and factors that influenced the design of the multi-purpose ship which has a larger capacity, lower fuel consumption and lighter structural weight.

The article discusses the results of a collapse analysis of double structures of a Kamsarmax type bulk carrier using idealized structural unit method (ISUM). Factors considered include the effects of shear in web of floors and girders, lateral pressure on plating and welding residual stress on collapse behavior and strength. The validity of the ISUM analyses results were done through collapse analyses using nonlinear finite element method (FEM) software, MSC.Marc.

The article discusses the results of a series of progressive collapse analyses on 1/13-scale container ship models subjected to pure bending, pure torsion and combined bending and torsion using idealized structural unit method (ISUM) created by the research authors. A comparison between the calculated load-displacement relationships and the experimental results as well as the calculated results applying nonlinear finite element method (FEM) was also performed.

The article discusses a study about the development of new non-rectangular quadrilateral Idealised Structural Unit Method (ISUM) element in accordance with the formulation of the isoparametric finite element method (FEM) element. A comparison is made between calculated results applying the new element and those by nonlinear FEM analyses. FEM is described as a general application for structural analyses on a ship's hull girder. A simulation of collapse behavior under in-plane thrust load is made with the element.