TY - GEN
T1 - Indirect Measurements of Added Wave Resistance on an In-service Container Ship
AU - Nielsen, Ulrik D.
AU - Johannesen, Jacob R.
AU - Bingham, Harry B.
AU - Blanke, Mogens
AU - Joncquez, Soizic
PY - 2021
Y1 - 2021
N2 - This paper investigates a semi-empirical model used to estimate added-wave resistance on a ship sailing in waves. The model relies on measurements from a continuous monitoring system, and produces an estimate - the indirect measurement - of added-wave resistance, based on the difference between, on the one side, the measured power and, on the other side, a summation of theoretically calculated resistance contributions but neglecting the component because of seaway. Hence, the added-wave power is obtained as the surplus. The model has been applied to more than three months of full-scale data recorded on an in-service operating container ship. The results indicate reasonable levels of the added-wave power, emphasising that both positive and negative values are obtained, since the model is not restricted to relative wave directions forward of beam. It is found that following waves often lead to 'negative resistance', in fact creating a thrust, but, importantly, following waves can also increase the total resistance significantly.
AB - This paper investigates a semi-empirical model used to estimate added-wave resistance on a ship sailing in waves. The model relies on measurements from a continuous monitoring system, and produces an estimate - the indirect measurement - of added-wave resistance, based on the difference between, on the one side, the measured power and, on the other side, a summation of theoretically calculated resistance contributions but neglecting the component because of seaway. Hence, the added-wave power is obtained as the surplus. The model has been applied to more than three months of full-scale data recorded on an in-service operating container ship. The results indicate reasonable levels of the added-wave power, emphasising that both positive and negative values are obtained, since the model is not restricted to relative wave directions forward of beam. It is found that following waves often lead to 'negative resistance', in fact creating a thrust, but, importantly, following waves can also increase the total resistance significantly.
KW - Added-wave resistance
KW - Indirect measurements
KW - Continuous monitoring system
KW - Following waves
KW - Correction procedures
U2 - 10.1007/978-981-15-4624-2_7
DO - 10.1007/978-981-15-4624-2_7
M3 - Article in proceedings
SN - 978-981-15-4623-5
T3 - Lecture Notes in Civil Engineering
SP - 115
EP - 132
BT - Proceedings of the 14th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS 2019)
A2 - Okada, Tetsuo
A2 - Kawamura, Yasumi
A2 - Suzuki, Katsuyuki
PB - Springer
CY - Singapore
T2 - The 14th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS 2019)
Y2 - 22 September 2019 through 26 September 2019
ER -