An efficient direct calculation approach for fatigue assessment of container ships concerning bending and warping stresses
Paper in proceedings, 2014

Container ships are particularly susceptible to torsional loads. The distribution of torsion-induced warping stress in a container ship hull is more complicated and difficult to be expressed by beam theory formulas. In practice, finite element (FE) analysis is typically used to calculate the stress response to wave-loading conditions. However, it is time consuming to compute hull girder stresses for all relevant sea conditions through FE analyses. In this paper, an efficient and robust approach is proposed by combining beam theory and FE analyses in the determination of hull girder stresses. The parameters required by beam theory can be regressed through matching stress records from a FE analysis with the corresponding sectional and pressure loads from the hydrodynamic simulation. Stress records obtained using the proposed method are utilized in fatigue assessment of a case study container vessel. The results show that the accuracy of the regression approach is satisfactory compared with the full FE analyses.

fatigue

warping stress

linear regression

container ship

Beam theory

finite element (FE) analysis

Author

Zhiyuan Li

Chalmers, Shipping and Marine Technology, Division of Marine Design

Jonas Ringsberg

Chalmers, Shipping and Marine Technology, Division of Marine Design

Wengang Mao

Chalmers, Shipping and Marine Technology, Division of Marine Design

Proceedings of The 2014 ASME 33rd International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2014)

Vol. 4A 1-9 OMAE2014-23175

The ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2014)
San Francisco, CA, USA,

Chalmers Area of Advance Transport – funding 2014

Chalmers, 2014-01-01 -- 2014-12-31.

Subject Categories

Mechanical Engineering

Materials Engineering

Mathematics

Driving Forces

Sustainable development

Innovation and entrepreneurship

Areas of Advance

Transport

Materials Science

Roots

Basic sciences

DOI

10.1115/OMAE2014-23175

More information

Latest update

10/11/2018