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Brodogradnja : An International Journal of Naval Architecture and Ocean Engineering for Research and Development, Vol. 72 No. 3, 2021.

Original scientific paper

https://doi.org/10.21278/brod72304

ON THE INVESTIGATION OF WIND GENERATED WAVES IN BANGLADESH RIVERS FOR THE ASSESSMENT OF STABILITY REQUIREMENTS IN INLAND VESSEL DESIGN

Muhammad Rabiul Islam orcid id orcid.org/0000-0003-3357-8442 ; Faculty, Naval Architecture and Marine Engineering Department Military Institute of Science and Technology (MIST) Dhaka, Bangladesh
Mahmudul Hasan Akib orcid id orcid.org/0000-0002-2164-5073 ; Naval Architecture and Marine Engineering Department Military Institute of Science and Technology (MIST) Dhaka, Bangladesh
Fariha Tabassum orcid id orcid.org/0000-0002-9326-7171 ; Naval Architecture and Marine Engineering Department Military Institute of Science and Technology (MIST) Dhaka, Bangladesh
Khandakar Akhter Hossain ; Faculty and Head, Naval Architecture and Marine Engineering Department Military Institute of Science and Technology (MIST) Dhaka, Bangladesh

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page 45-59

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Abstract

Standard environmental condition is one of the main inputs in designing a vessel especially in assessment of stability condition. The performance based minimum stability requirements are determined by assessing vessels' dynamic failure modes. Winds as well as wind generated waves are the main factors that affect a specific vessel’s dynamics. Wind generated waves in rivers though are usually small in comparison with ocean waves may play a crucial role behind inland vessels accidents. The river condition of a crucial location in Bangladesh inland river routes is assessed where wind velocities have been taken for a specific duration from a reliable secondary source. A narrow fetch model that considers the wave generation in off-wind direction for estimating wind wave parameters has been used to consider the spiral shape of Bangladesh inland routes. The Bretschneider energy spectrum model for short term wave state is compared with the fetch limited model JONSWAP for the estimated wave condition. This study indicates the rationality of conforming the safety level of Bangladesh inland vessels equivalent to river-sea vessels as defined by other nationals and the classification societies. The wave parameters that are estimated in this study can be used to form a limited wave scatter table for predicting short term environmental conditions to assess the dynamic stability failure modes of the vessels.

Keywords

wind wave; inland vessel; stability; fetch; energy spectrum; significant wave height; peak period

Hrčak ID:

262203

URI

https://hrcak.srce.hr/262203

Publication date:

1.7.2021.

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