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A Blind Comparative Study of Focused Wave Interactions with Floating Structures (CCP-WSI Blind Test Series 3)

Ransley, Edward and Yan, Shiqiang and Brown, Scott and Hann, Martyn and Graham, David and Windt, Christian and Schmitt, Pál and Davidson, Josh and Ringwood, John and Musiedlak, Pierre-Henri and Wang, Jinghua and Wang, Junxian and Ma, Qingwei and Xie, Zhihua and Zhang, Ningbo and Zheng, Xing and Giorgi, Giuseppe and Chen, Hao and Lin, Zaibin and Qian, Ling and Ma, Zhihua and Bai, Wei and Chen, Qiang and Zang, Jun and Ding, Haoyu and Cheng, Lin and Zheng, Jinhai and Gu, Hanbin and Gong, Xiwu and Liu, Zhenghao and Zhuang, Yuan and Wan, Decheng and Bingham, Harry and Greaves, Deborah (2020) A Blind Comparative Study of Focused Wave Interactions with Floating Structures (CCP-WSI Blind Test Series 3). International Journal of Offshore and Polar Engineering, 30 (1). pp. 1-10. ISSN 1053-5381

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Abstract

Results from the CCP-WSI Blind Test Series 3 are presented. Participants, with numerical methods, ranging from low-fidelity linear models to high-fidelity Navier–Stokes (NS) solvers, simulate the interaction between focused waves and floating structures without prior access to the physical data. The waves are crest-focused NewWaves with various crest heights. Two structures are considered: a hemispherical-bottomed buoy and a truncated cylinder with a moon-pool; both are taut-moored with one linear spring mooring. To assess the predictive capability of each method, numerical results for heave, surge, pitch, and mooring load are compared against corresponding physical data. In general, the NS solvers appear to predict the behaviour of the structures better than the linearised methods, but there is considerable variation in the results (even between similar methods). Recommendations are made for future comparative studies and development of numerical modelling standards

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