Identification of wave profiles encountered by a ship with no forward speed using Kalman filter technique and validation by tank tests - long-crested irregular wave case -

Komoriyama, Yusuke; Iijima, Kazuhiro; Tatsumi, Akira; Fujikubo, Masahiko

doi:10.1016/j.oceaneng.2023.113627

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Since the KF method gives a real-time response to the operator, it can be used, for example, in a real-time alert system in the extreme sea condition. Recently, Komoriyama et al (2023) applied the KF method to prediction of real-time wave profiles using measured responses. This is expected to make it possible to predict not only structural responses but also any ship performance in waves, including cargo responses, added resistance, and so forth.…”

Section: Kalman Filter (Kf) Methodsmentioning

confidence: 99%

A digital twin for ship structures—R&D project in Japan

Fujikubo,

Okada,

Murayama

et al. 2024

DCE

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In order to clarify and visualize the real state of the structural performances of ships in operation and establish a more optimal, data-driven framework for ship design, construction and operation, an industry-academia joint R&D project on the digital twin for ship structures (DTSS) was conducted in Japan. This paper presents the major achievements of the project. The DTSS aims to grasp the stress responses over the whole ship structure in waves by data assimilation that merges hull monitoring and numerical simulation. Three data assimilation methods, namely, the wave spectrum method, Kalman filter method, and inverse finite element method were used, and their effectiveness was examined through model and full-scale ship measurements. Methods for predicting short-term extreme responses and long-term cumulative fatigue damage were developed for navigation and maintenance support using statistical approaches. In comparison with conventional approaches, response predictions were significantly improved by DTSS using real response data in encountered waves. Utilization scenarios for DTSS in the maritime industry were presented from the viewpoints of navigation support, maintenance support, rule improvement, and product value improvement, together with future research needs for implementation in the maritime industry.

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Section: Kalman Filter (Kf) Methodsmentioning

confidence: 99%

A digital twin for ship structures—R&D project in Japan

Fujikubo,

Okada,

Murayama

et al. 2024

DCE

Self Cite

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Onboard identification of stability parameters including nonlinear roll damping via phase-resolved wave estimation using measured ship responses

Takami,

Dam Nielsen,

Juncher Jensen

et al. 2024

Mechanical Systems and Signal Processing

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Consideration of Bending and Torsional Testing Methods Suitable for Hydro-Structural Ship Models

Houtani,

Mikami,

Komoriyama

et al. 2023

J.JASNAOE

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This paper examines bending and torsional testing methods specific to hydro-structural ship models. The methods examined include testing on land and water. The on-land testing uses supports that are designed not to damage the soft hull. Meanwhile, the on-water testing gives vertical bending or torsional moments to a floating ship model by moving ballast weights. The ship model is naturally twisted with respect to the shear center, which is a significant advantage of on-water torsional testing. Bending and torsional tests based on the proposed methods were performed using a hydro-structural bulk carrier model composed of GFRP (Glass Fiber Reinforced Plastics) sandwich panels. The test results validated these proposed test methods except for the on-land torsional test, where it is difficult to provide accurate bilaterally symmetric constraint conditions at the supports. In addition, these test results are used to discuss the influences of the adhesive and ambient temperature variations on FBG (Fiber Bragg Gratings) strain sensor outputs.

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Identification of wave profiles encountered by a ship with no forward speed using Kalman filter technique and validation by tank tests - long-crested irregular wave case -

Cited by 3 publications

References 23 publications

A digital twin for ship structures—R&D project in Japan

A digital twin for ship structures—R&D project in Japan

Onboard identification of stability parameters including nonlinear roll damping via phase-resolved wave estimation using measured ship responses

Consideration of Bending and Torsional Testing Methods Suitable for Hydro-Structural Ship Models

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