船隻在順波中衝浪與突轉現象之研究

A Study on Surf - Riding and Broaching - To of a Vessel in Following Seas

李銘霖(M. L. Lee) ； 羅志宏(J. H. Luo) ； 吳志清(C. C. Wu)

《中國造船暨輪機工程學刊》 22卷4期 (2003/11) Pp. 183-190

https://doi.org/10.29982/JTSNAME.200311.0003

摘要

本文利用一個非線性數學模式，以探討高速船隻在順波中的衝浪與突轉現象；其係以六自由度剛體動力學理論為基礎，考慮波力、流體動力、螺槳推力及舵力等建立而成。在執行模擬計算時，本研究應用自動操船系統操舵，以保持船隻在順波及艉斜波中的預定航向。本文以某拖網漁船做為數值計算船型，進行模擬分析，並針對不同海況，預估船隻發生衝浪及突轉的臨界初始縱移速度及臨界初始航向角。本模擬分析的部分結果與現有文獻所示的實驗及理論結果相比較，可發現兩者相當吻合。

關鍵字

衝浪 ； 突轉 ； 順波 ； 自動操船系統

並列摘要

A nonlinear mathematical model was utilized to investigate the behavior of surf-riding and broaching-to of a vessel in severe following seas. Based on the dynamics of six-degree-of-freedom rigid
body motion, the model was derived with the consideration of wave force, hydrodynamic force, propeller and rudder force. An automatic control system was incorporated in the analysis so that the vessel could persist in her heading direction. Simulation was carried out for a trawler, and the critical initial surge velocity and the critical initial heading angle occurring surf-riding and broaching-to were predicted for different sea conditions. Furthermore, comparisons with a model experiment showed a fairly good agreement.

並列關鍵字

Surf-Riding ； Broaching-To ； Following Seas ； Autopilot