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| Error Analysis of Draft Survey Based on Error Transfer Principle |
| ZHU Jing-lin,ZHU Jin-shan |
| Navigation College, Dalian Maritime University, Dalian, Liaoning 116026, China |
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Abstract Based on the overview of the error correlation theory and the draft survey method, the error propagation law of the draft survey were analyzed. By reading a large number of documents to sort out the systematic errors in the weight measurement process, in many errors, the systematic error caused by the vertical component of the anchor chain and the cable has not been effectively corrected. Based on the JTS144-1-2010 "Port Engineering Load Specification"(hereinafter referred to as specifications) and the existing research results, the lateral and longitudinal component forces of ship wind pressure and water flow force are analyzed and obtained. The horizontal external force of the hull (i.e., the reaction force of the horizontal tension component of the anchor chain) were combined with the mechanical principle and the anchoring state of the ship to establish a calculation model of the vertical component of the anchor tension, which can be used to solve the correction of systematic error caused by the vertical component of anchor chain. The example showed that when the wind speed is 13m/s and the flow rate reaches 4kn (1kn=1.852km/h), only this error has reached 28% of the allowable error of the water gauge.
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Received: 10 August 2019
Published: 24 May 2021
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［1］中华人民共和国国家进出口商品检验局. SN/T3023-2012 进出口商品重量鉴定规程 水尺计重［S］. 2012.
［2］丁振良. 误差理论与数据处理［M］. 哈尔滨: 哈尔滨工业大学出版社, 2014.
［3］徐邦祯, 田佰军. 船舶货运［M］. 大连: 大连海事大学出版社, 2011.
［4］章文俊, 高世龙, 朱金善, 等. 基于逻辑树的水尺计重误差分析［J］. 中国航海, 2015, 38(2): 64-68.
Zhang W J, Gao S L, Zhu J S, et al. Draft Survey Error Analysis Based on Logic Tree［J］. Navigation of China, 2015, 38(2): 64-68.
［5］葛圣彦, 杜嘉立. 水尺计重误差的初步探讨［J］. 中国水运, 2007, 5(9): 235-236.
Ge S Y, Du J L. A Preliminary Discussion on the Draft Survey Error［J］. China Water Transport, 2007, 5(9): 235-236.
［6］Batchelor G K. An Introduction to Fluid Dynamics［M］. Cambridge:Cambridge University Press, 2000
［7］高世龙. 流速对散货船水尺计重误差影响的研究［D］. 大连: 大连海事大学, 2014.
［8］Paul E M. Methods and Apparatus to Determine Vesel Draft and Amount of Cargo Loaded in a Vessel: 7325328B1 ［P］. 2009-10-06.
［9］Irena J. Application of Optical Fiber Technology on Ships［J］. Scientific Journal of Maritime Research, 2008, 22(2): 271-282.
［10］孙图南, 高强, 周翀, 等. 我国水尺计重影响因素及优化方式的研究进展［J］. 检疫检验学刊, 2011, (4): 15-16.
Sun T N, Gao Q, Zhou W, et al. Advances in Draft Survey Factors and It’s Optimization Method in China［J］. Journal of Inspection and Quarantine, 2011, (4): 15-16.
［11］刘辉强. 水尺计重及其误差分析［D］. 大连: 大连海事大学, 2010.
［12］张钢. 散装货物运输中水尺计重的原则和方法［J］. 中国航海, 2006, (4): 35-38.
Zhang G. The Principles and Means of Draft Survey in Bulk Cargo Transportation［J］. Navigation of China, 2006, (4): 35-38.
［13］中华人民共和国交通运输部. JTS 144-1-2010 港口工程荷载规范［S］. 2010.
［14］栗珂, 郑金海, 严士常, 等. 小流向角下的30万吨级油船水流力试验［J］. 水运工程, 2018, (11): 60-63.
Li K, Zheng J H, Yan S C, et al. Experiment on flow force of 300, 000 DWT tanker under small flow angle［J］. Port ＆ Waterway Engineering, 2018, (11): 60-63.
［15］李叶兴, 陈国平, 严士常, 等. 大型油轮水流力试验研究［J］. 水运工程, 2012, (9): 12-17.
Li Y X, Chen G P, Yan S C, et al. On ship Furrent force under different current angles［J］. Port ＆ Waterway Engineering, 2012, (9): 12-17.
［16］Oil Companies International Marine Forum. Mooring Equipment Guidelines［M］. 3rd ed. Edinburgh, UK: Witherby Seamanship International, 2008.
［17］BS 6349-1: 2000 Maritime structures—Part 1: Code of practice for general criteria［S］.
［18］洪碧光. 船舶操纵［M］. 大连: 大连海事大学出版社, 2008: 139-145.
［19］于洋, 谢永和. 非均匀条件下的船舶锚链静力特性快速计算［J］. 中国航海, 2010, 33(1): 42-45.
Yu Y, Xie Y H. A Rapid Computing Method of Static Performances of Anchor Chains under Uneven Conditions ［J］. Navigation of China, 2010, 33(1): 42-45. |
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2021, Vol. 42 
