散裝貨運載船操縱流體動力導數預估數值分析

The Study for Prediction Procedure of Manoeuvring Hydrodynamic Coefficients of The Bulk Carrier

"本研究重點在於建立國內散裝貨運載船操縱流體動力導數之調校分析技術，使用國內自主發展之真時操船模擬機(UMS)，建構快速且有效的散裝貨運載船操縱運動模擬數值評估模式。船舶操縱數值模型採用日本(MMG, Mathematical Modelling Group)理論。本研究選用海大操船中心的一艘散裝貨運載船進行操縱運動數值模擬，藉由實船海試資料來進行船舶數值模型參數之建立與驗證。在真時操船數值模擬之初步驗證中，發現Inoue於1981年所提出之流體動力導數預估經驗公式，無法完全反應出散裝貨運載船之操縱運動反應特性。本研究對船體之線性及非線性流體動力導數進行敏感度分析，並建立散裝貨運載船數值模型之標準調校程序。藉以快速且正確產生UMS操船模擬系統中所需之船舶流體動力導數模型，提供航海操船模擬教學、訓練及研究之應用。"

"A prediction procedure of manoeuvring hydrodynamic coefficients for the bulk carrier is proposed in this study. A real-time ship simulator, UMS, which is based on the MMG model has been used for the sea trial simulations to verify the manoeuvring mathematical model of ship. This mathematical model includes the seakeeping and manoeu-vring characteristics and the hydrodynamic coefficients are estimated with empirical formula or database from pub-lished papers. It is found that the empirical formula proposed by Inoue (1981) cannot be applied to the mathematical model of the bulk carrier. A series of factor study for the hydrodynamic coefficients were carried out to investigate the turning characteristics of the bulk carrier. Based on the numerical analyses of hydrodynamic coefficients, the standard operating procedure of the parameter adjustments for the mathematical model of ship simulator has been modelled. Finally, the numerical predicting model of manoeuvring characteristics has been carried out to predict the manoeuvring performance of the bulk carrier and validated with the sea trial data. This study can provide a good mathematical model of ship simulator for teaching, training and research in the field of marine navigation."