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Keywords: estimation
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Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-310
... to know where receives significant drag force. However, it is not realistic for actual ships to obtain the pressure distribution by using numerous sensors. Therefore, we develop a method to estimate pressure distribution on the ship hull by using pressure data measured at one position. The pressure...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-294
... ABSTRACT Within the Joint Research Project RetroLadung, weight-optimized cell guides with integrated motion sensors and data-driven decision support systems (DSS) are developed. A basic functionality of the DSS is the estimation of sea states based on measurement data from acceleration sensors...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-460
... ABSTRACT This paper presents a depth inversion approach that uses a direct estimation of the wave period and wavelength locally in space from radar images. The wave periods are retrieved by time-signals analysis at several points. The wavelengths are directly measured from the distance...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-529
... ABSTRACT The seakeeping of a ship is estimated precisely at design time. However, its reliability has declined with the enlargement of the ship's hull. Also, computing the performance comprehensively under all operating conditions is unrealistic. Therefore, it is practical to estimate...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4180
... speed motion are of interest in relation to the simulation of the propeller-engine interaction. The estimation of the associated fuel consumption and of the time the ship to reach a certain speed or to come to full stop becomes important, along with the estimation stopping distance (see, e.g., Mizythras...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4169
... estimate shape-form of air cushion vehicle (ACV) skirt under abnormal state, and relative program was developed in AutoCAD by Visual LISP. The shape-form of different type skirt sect profile at bow, side or stern of ACV could be reached quickly, which agreed with those got by FEM analysis method in Abaqus...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4176
... Abstract The vessel state and parameter estimation is essential to ship maneuvering and collision avoidance. This study presents an application of a particle filter algorithm to estimate vessel states and parameters. Particularly, to capture the impact of the vessel underactuated property...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-3198
... a storage tank model was solved with a finite element solver, and the field variables between the different regions were successfully exchanged without vast numerical cost. The developed simulation was applied to the problem for estimating tsunami and storage tank motion and the dependency of tank...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1251
... hull lines with vertical sides extending over the entire hull entrance or even bulbous bows. Such vessels may have an ice class up to Arc7. The hydrodynamic model does not provide sufficiently simple analytical relations for class rules to estimate impact ice loads on vertical sides in way of forebody...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3133
... ABSTRACT In this study, the estimation of the asymmetric factor for a semisubmersible platform based on linear analysis is conducted. The asymmetric factor is defined as the ratio of nonlinear wave elevation to linear wave elevation. Estimation is performed according to the simplified method...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-400
... ABSTRACT Recently, several attempts have been made to estimate the ocean wave spectrum from the vessel motion using the Kalman filter. The Kalman filter has the advantage of real-time estimation, lower cost, and easier installation than other instruments. However, when a vessel is less...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-289
... ABSTRACT For the active narrow-band underwater acoustic positioning system, it is the key to estimate the phase shift of the received signals between the array elements accurately. With the adaptability to ocean environment, the adaptive Wiener filter can reduce noise jamming adaptively...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-670
... ABSTRACT The performance of full scale ship is commonly estimated from results of model scale analysis as ITTC correction methods. Recently, full scale CFD is also being used for ship performance estimation due to less scale effect. However, full scale CFD is difficult to validate the results...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-303
... ABSTRACT The short-term variability of cross-spectral analyses is investigated and its effect on the wave buoy analogy is analysed. Based on the analogy, the sea state can be estimated from the cross-spectra of the ship response, i.e. ship as a wave buoy. In a steady state condition, a certain...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-240
... ABSTRACT Since the oil and gas resources of the Arctic have become easier to develop, the need for the transportation of these resources becomes evident. The ice resistance should be estimated to meet the need for the arctic vessel design and the optimal route for the voyage should...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-685
... predicted using parameter estimation of creep models based on the short-term experimental results. However, the prediction results are significantly different according to the model which is used for prediction. In this paper, improving method for creep prediction is presented to reduce the model...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-163
.... Regarding the extreme parameters estimation, four fundamental extreme value distribution functions, namely, Gumbel, Weibull, generalized extreme value and Pearson type III distributions are selected to obtain different return values of ice velocity and thickness. All functions have passed the K-S test...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-194
... and the life of the seafastening structure. In this study, the number of environmental cases for the analysis is 14 and each case is analyzed to estimate each fatigue damage. And these damages of seafastening structures in each case are summed and fatigue life is obtained from the total fatigue damage. Because...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-624
... ABSTRACT In this paper, a decision support tool for collision avoidance is presented. The collision probability of the investigated container vessel is estimated using a 3-step approach. In this methodology, the manoeuvrability and the propulsion system performance of the own vessel is taken...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-635
... ABSTRACT Structural monitoring is increasingly becoming everyday business in the offshore industry. The monitoring may target the strain estimation or focus on tracking the changes in the dynamic properties of the structure in order to predict damages at remote / or possibly subsea locations...

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