




摘" " 要:《海船系泊及航行試驗通則》GB/T 3471-2011中對雙螺旋槳船的回轉性試驗要求:“對于雙螺旋槳船,應按規定的速度進行正倒車交錯回轉試驗,測定回轉直徑[1]。”但是,船舶技術規格書中一般只明確經濟航速(巡航速度)和設計航速,沒有“規定的航速”的定義,船東、船檢和船廠各方對其取值往往難以達成一致意見。本文通過對回轉性試驗過程和實船試驗數據進行分析,得出對“規定的航速”的理解和判斷,為雙槳船舶正倒車交錯回轉試驗的規定航速的確定提供參考。
關鍵詞:雙槳;正倒車交錯;回轉性試驗;規定航速
中圖分類號:U661.33+3 " " " " " " " " " " " " " 文獻標志碼:A
Discussion on Ahead and Astern Crossover Turning
Trial of Twin-propeller Ship
PAN Guoxiao," SHI Lei," CHEN Weilin
( CSSC Huangpu Wenchong Shipbuilding Co., Ltd.," Guangzhou 510715," China )
Abstract: The \"General Principles for Mooring and Navigation Test of Sea Vessels\" GB/T 3471-2011 requires the rotation test of twin-propeller ships: \"For twin-propeller ships, the forward and reverse staggered rotation test shall be carried out according to the specified speed to determine the rotation diameter[1]. However, the technical specifications of ships generally only specify the economic speed (cruising speed) and design speed, and there is no definition of \"specified speed\", and it is often difficult for shipowners, ship surveyors and shipyards to reach a consensus on their values. In this paper, through the analysis of the rotation test process and the actual ship test data, the understanding and judgment of the \"specified speed\" are obtained, which provides a reference for the determination of the specified speed of the forward and reverse staggered rotation test of the double propeller ship.Key words: twin-propeller;" ahead amp; astern crossover;" turning test;" specified speed
1" " "引言
向海洋要資源是世界各國戰略舉措,隨著海洋開發和海洋維權的不斷深入,對船舶的性能要求越來越高,在航速、推進功率、機動性等方面的要求也不斷提高。由于雙機雙槳比單機單槳有更好的機動性,越來越多的船舶采用雙機雙槳推進型式,使得雙機雙槳型主推進系統的應用越來越廣。雙機雙槳型船舶與單機單槳型船舶相比,海上試驗方式方法大體上相同,但也有一定區別,相應的規范標準隨著對船舶的認識的提高,不斷修訂和豐富相關試驗內容。在具體產品上如何根據現有的規范標準形成一致的試驗和檢驗共識,不僅是關系到船舶建造主要環節是否順利的問題,而且可能影響船舶安全乃至船員安全的重要問題。
2" " 全速正倒車交錯回轉試驗的安全性分析
通常情況下,對船舶試航安全的一般認識大多為船舶穩性是否滿足要求,往往容易忽略一些存在著危及安全的隱患。……