The SNNM Semiempirical Method for the Prediction of the Added Resistance of Ships in Waves of Arbitr

SNAME Greek Section is pleased to invite you to its final online-only meeting for the 2020-2021 season where Apostolos Papanikolaou, Em. Professor, National Technical University of Athens, Greece, and Shukui Liu, Lecturer, Nanyang Technological University, Singapore, will make a presentation on the topic of "The SNNM Semiempirical Method for the Prediction of the Added Resistance of Ships in Waves of Arbitrary Heading".

The accurate prediction of the added resistance in waves is a classic and very complex topic of seakeeping, and the progress in the state of the art has been moderate. This subject has recently attracted increased interest due to its direct involvement in the implementation of the energy efficiency regulations, such as EEDI, which were first introduced by IMO in 2008 and require the use of a satisfactory and transparent method for the estimation of the added resistance and powering in waves under normal and extreme environmental conditions (minimum powering issue). This webinar will first briefly review available methods in the added resistance prediction, followed by a critical examination of the essential problems faced by alternative approaches. The focal point of the webinar will be the presentation of the SNNM semi-empirical method, originally developed in the SHOPERA project at NTUA, Greece and later on extended to arbitrary headings at NTU, Singapore. MARIC, China supported actively the validation of the method. An early version of the method has been discussed at IMO MEPC 70…76 as a recommended method for minimum propulsion power assessment. Recently, it also successfully passed an independent validation by the 29th ITTC SOS committee and subsequently was accepted in the ITTC procedure for correcting the effect of waves on speed/power trial results. The SNNM method requires the knowledge of only very limited hull form information, thus, it can be readily and widely applied by practicing engineers in cases, where detailed hull form is not available, as it is often the case for non newbuildings (EEXI). It is thus expected to contribute effectively to the maritime industry’s effort in reducing GHG emission following IMO’s targets.

Apostolos Papanikolaou, Em. Professor, National Technical University of Athens, Greece

Shukui Liu, Lecturer, Nanyang Technological University, Singapore

Prof. Dr.-Ing. Habil. Apostolos D. Papanikolaou is em. Professor of the National Technical University of Athens and Visiting Professor of the University of Strathclyde. He studied Naval Architecture and Marine Engineering at the Technical University of Berlin. He headed more than 75 funded research projects and was author/co-author of over 650 scientific publications dealing with the design and optimization of conventional and unconventional vessels, the hydrodynamics analysis of ships in calm water and in seaways, the logistics-based ship design, the stability and safety of ships and regulatory developments of maritime safety at IMO. He received a series of international prize awards, including SNAME’s Dr. K. Davidson Medal for outstanding achievements in research (2010). He is Fellow of SNAME, RINA, STG and Distinguished Foreign Fellow of Japan’s SNAOE.

Dr. Shukui Liu is a graduate of Harbin Engineering University (B.Eng. & M.Eng. in Naval Architecture and Ocean Engineering). He completed his PhD research on the seakeeping subject at the National Technical University of Athens in 2011. Currently, he is a lecturer at Nanyang Technological University. His scientific interests cover the fields of ship hydrodynamics, including in general the resistance, propulsion, seakeeping, maneuvering subjects, and their impacts on ship design and operation. He is PI of two funded research projects and is author/co-author of over 40 scientific publications. He is a member of SNAME.