交通运输工程学报
交通運輸工程學報
교통운수공정학보
JOURNAL OF TRIFFIC AND TRANSPORTATION ENGINEERING
2015年
2期
50-58
,共9页
潘德位%林成新%孙德平%刘志杰%周超玉
潘德位%林成新%孫德平%劉誌傑%週超玉
반덕위%림성신%손덕평%류지걸%주초옥
船舶工程%沉船打捞%大倾角搁浅船舶%扳正方案%扳正力%搁坐力%GHS软件
船舶工程%沉船打撈%大傾角擱淺船舶%扳正方案%扳正力%擱坐力%GHS軟件
선박공정%침선타로%대경각각천선박%반정방안%반정력%각좌력%GHS연건
ship engineering%wreck salvage%big-angle tilted aground ship%uprighting scheme%uprighting force%aground force%GHS software
在研究大倾角搁浅船舶的扳正过程中，计算了难船扳正力、横倾角和吃水。根据搁浅船舶的受力特点，建立了其力学模型，分析了扳正过程中横倾角、吃水、入泥深度与海底泥土性质对船体的影响。利用 GHS 软件模拟搁浅船舶的扳正过程，以某搁浅液化气船舶为例，求解了其扳正过程中船体扳正力、总搁坐力、剪力、弯矩和转矩，比较了难船不同扳正方案，分析了难船的扳正方式、搁坐位置、上层建筑与储气罐对难船打捞的影响。分析结果表明：在扳正过程中，3个方案的力学参数的变化趋势是一致的。最大扳正力相差较大，差值为9．1％～20．0％。搁坐力、剪力和弯矩均在横倾角为－55°～－50°时达到最大值，船体虽然在该阶段不需加载较大的扳正力，但仍应该注意船体的受力情况。在横倾角为－120°～－100°时，转矩变化非常剧烈。弯矩和转矩均出现了反向变化的现象，威胁船体结构的安全，扳正中应该谨慎处理。选择合适的扳正方案时应该综合考虑扳正力施力点的位置和扳正过程对船体与环境安全的潜在威胁。
在研究大傾角擱淺船舶的扳正過程中，計算瞭難船扳正力、橫傾角和喫水。根據擱淺船舶的受力特點，建立瞭其力學模型，分析瞭扳正過程中橫傾角、喫水、入泥深度與海底泥土性質對船體的影響。利用 GHS 軟件模擬擱淺船舶的扳正過程，以某擱淺液化氣船舶為例，求解瞭其扳正過程中船體扳正力、總擱坐力、剪力、彎矩和轉矩，比較瞭難船不同扳正方案，分析瞭難船的扳正方式、擱坐位置、上層建築與儲氣罐對難船打撈的影響。分析結果錶明：在扳正過程中，3箇方案的力學參數的變化趨勢是一緻的。最大扳正力相差較大，差值為9．1％～20．0％。擱坐力、剪力和彎矩均在橫傾角為－55°～－50°時達到最大值，船體雖然在該階段不需加載較大的扳正力，但仍應該註意船體的受力情況。在橫傾角為－120°～－100°時，轉矩變化非常劇烈。彎矩和轉矩均齣現瞭反嚮變化的現象，威脅船體結構的安全，扳正中應該謹慎處理。選擇閤適的扳正方案時應該綜閤攷慮扳正力施力點的位置和扳正過程對船體與環境安全的潛在威脅。
재연구대경각각천선박적반정과정중，계산료난선반정력、횡경각화흘수。근거각천선박적수력특점，건립료기역학모형，분석료반정과정중횡경각、흘수、입니심도여해저니토성질대선체적영향。이용 GHS 연건모의각천선박적반정과정，이모각천액화기선박위례，구해료기반정과정중선체반정력、총각좌력、전력、만구화전구，비교료난선불동반정방안，분석료난선적반정방식、각좌위치、상층건축여저기관대난선타로적영향。분석결과표명：재반정과정중，3개방안적역학삼수적변화추세시일치적。최대반정력상차교대，차치위9．1％～20．0％。각좌력、전력화만구균재횡경각위－55°～－50°시체도최대치，선체수연재해계단불수가재교대적반정력，단잉응해주의선체적수력정황。재횡경각위－120°～－100°시，전구변화비상극렬。만구화전구균출현료반향변화적현상，위협선체결구적안전，반정중응해근신처리。선택합괄적반정방안시응해종합고필반정력시력점적위치화반정과정대선체여배경안전적잠재위협。
In order to study the uprighting process of big-angle tilted aground ship,the uprighting force,heel angle and draft of the ship were computed.The mechanical model of aground ship was established based on its mechanical characteristics,and the influences of heel angle,draft, driving depth and natural properties of seabed soil on hull were analyzed.Taking a big-angle tilted aground LNG tanker as an example,the uprighting force,total aground force,shear, moment and torque of the tanker in the uprighting process were solved by the simulation of GHS software.Different uprighting schemes were compared,and the influences of uprighting modes, aground positions,superstructures and liquid gas storage tanks on uprighting process were analyzed.Analysis result shows that the changing trends of mechanical parameters of three schemes are similar.The larger differences are 9.1%-20.0% among the maximum uprighting forces of three schemes.The aground force,shear force and moment reach the maximums when the heel angle ranges from -55°to -50°.The stage need not exert larger uprighting forces,but the force situation of hull should be noticed.The torque changes enormously when the heel angle ranges from -120°to -100°.The opposite changing phenomenon of moment and torque directly threatens the safety of hull structure,so it should be handled with more care during uprighting process.The appropriate uprighting scheme is selected by considering the positions of points of uprighting forces and the reliability for the safety of hull and environment during uprighting process.1 tab,9 figs,21 refs.
