Impact analysis in an engineering environment

ABSTRACT

Assessment of the residual strength of ships after accidental loads has gained importance. Only if the load-carrying capacity after possible accidents is known, the structural safety can be judged. Analyses of accidental impacts and residual strength have been mainly performed with dedicated codes. Improved general purpose analysis software packages make it worthwhile to assess engineering environments to perform such analyses. Drop tests are simulated within the ANSYS Workbench to assess the analysis of accidental impacts. The results are compared to mesh size dependent criteria in the literature. The influence of geometry, material plasticity models and modelling techniques is investigated. Possibilities to transfer the results to further analyses of residual strength are discussed. In conclusion, a comparison of modelling methods is presented for more accurate results and higher time efficiency in non-linear dynamic analyses under impact loads. The applicability of further analyses to the deformed structures is given for future work.

KEYWORDS:

• Explicit dynamic analysis
• dropped object
• impact analysis
• plastic strain
• modelling issues

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes on contributors

Özlem Akkus obtained B.Sc. in naval architecture in 2008 and M.Sc. in maritime transport engineering in 2011. She has held several positions in maritime business and is a doctor student since 2017.

Patrick Kaeding graduated in naval architecture in 1998 and obtained doctor degree in structural analysis in 2001. He is full professor in ship structures since 2009.