波浪對不同側船體配置之三體船的迴旋運動影響分析

本文主要探討三體船於波浪中的操縱性能，針對不同的縱向與橫向側船體配置來進行迴旋運動模擬，以便瞭解不同側船體排列在波浪中操縱性能的影響。本文以結合操縱性與耐海性的數學模式為基礎，利用相對波高的概念，採用B-Spline整順方法，瞬時改變水下截片形狀來重新計算流體動力係數，並以此數值模式來模擬各配置下的左、右迴旋運動。本文比較不同側船體配置下的戰術直徑（tactical diameter）、前進距離（advance）、迴旋橫距（transfer）與迴旋時間。結果顯示介於船舯與船艉間的側船體縱向配置與中等距離的側船體橫向配置有普遍較佳的迴旋性，本文之結果可提供三體船於靜水或波浪中操縱性能的側船體配置設計之參考。

關鍵字

三體船；耐海性；操縱性；迴旋運動

並列摘要

The present paper mainly studies the turning circle performance of the trimaran ship in waves. The effects of different side hull arrangements on the turning circle motion of the trimaran ship are also investigated by using the time domain simulation analysis. The mathematical model including seakeeping and maneuvering characteristics are applied here and the relative wave elevation concept is considered. In order to calculate the hydrodynamic coefficients of the instantaneous draft of the each hull section for the trimaran ship at any time in waves, the B-spline fairing method is adopted to simulate the source points of the hull sections for the source distribution method. The tactical diameter, advance, transfer and turning time for one tuning circle with respect to different side hull arrangements are calculated for comparisons. The results reveal that the arrangement with the middle clearance and middle stagger i.e. PL2 and PT2, has the better turning performance. The present analysis can be as the useful reference for the consideration of the trimaran ship maneuvering characteristics either in calm water or in waves.

並列關鍵字

Trimaran Ship ； Seakeeping ； Maneuvering ； Turning Circle

國際替代計量

波浪對不同側船體配置之三體船的迴旋運動影響分析

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