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Multiobjective Optimization of Hull Form Based on Global Optimization Algorithm

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Journal of Shanghai Jiaotong university(Science) 2022年第3期27卷 346-355页

作者：刘洁张宝吉 Merchant Marine College Shanghai Maritime UniversityShanghai 201306China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 201306China

Rankine source method,optimization technology,parametric modeling technology,and improved multiobjective optimization algorithm were combined to investigate the multiobjective optimization design of hull form.A multiobjective and multilevel optimization design framework was constructed for the comprehensive navigation performance of *** software was utilized as the optimization platform,and nondominated sorting genetic algorithm II(NSGA-II)was used to conduct multiobjective optimization research on the resistance and sea-keeping performance of the ITTC Ship A-2 fishing *** objectives of this study are heave/pitch response amplitude and wave-making *** the displacement and the length between perpendiculars as constraints,we optimized the profile of the *** hierarchy process(AHP)and technique for order preference by similarity to ideal solution(TOPSIS)were used to sort and select Pareto solutions and determine weight coefficient of each navigation performance objective in the general ***,the hydrodynamic performance before and after the parametric deformation of the hull was *** results show that both the wave-making resistance and heave/pitch amplitude of the optimized hull form are reduced,and the satisfactory optimal hull form is *** results of this study have a certain reference value for the initial stage of multiobjective optimization design of hull form.

关键词： multiobjective optimization Rankine source method global optimization algorithm nondominated sorting genetic algorithm II(NSGA-II)

Study on Application of Pour Point Depressant for Diesel Fuel

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China Petroleum Processing & Petrochemical Technology 2008年第2期10卷 19-22页

作者： zhang baoji SINOPEC Research Institute of Petroleum Processing Beijing 100083

Taking into account the actual crude slate processed at the refinery, it is necessary to make reasonable combination and blending of crude oils. In order to cope with high wax content in diesel fuel it is proposed to appropriately regulate the refining process scheme and add additives to refined products. This measure after being applied in the production practice has brought about good results and has met the needs of commercial production.

关键词：倾点下降剂柴油机混合物商业应用燃料

Hydrodynamic Performance of Open-frame Deep Sea Remotely Operated Vehicles Based on Computational Fluid Dynamics Method

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Journal of Marine Science 2022年第1期4卷 23-33页

作者： Qianrong Li baoji zhang Merchant Marine College Shanghai Maritime UniversityShanghai201306China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai201306China

The resistance performance and motion stability of deep sea remotely operated vehicles(ROVs)subjected to underwater motion conditions are studied on the basis of the unsteady Reynolds-averaged Navier-Stokes method combined with the six-degree-of-freedom equation of motion to quickly and accurately predict *** the modeling process,we consider the complexity of ROV geometry and thus reduce the model to a series of regular geometries to maximize the position and weight of the original *** grid and value slots of an ROV are divided,and the surface is *** forward,backward,transverse,floating,and submerged resistance of ROVs are simulated and compared with existing experimental forces to determine the accuracy of the calculation ***,the oblique navigation of the ROV on the horizontal and vertical planes is ***,the motion response of the ROV to direct horizontal motion,heave,pitch,and yaw are *** force,moment,and motion time curves are *** stability of ROV motion is analyzed to provide technical support for the safety of ROVs.

关键词： ROV CFD Resistance performance Motion stability Numerical simulation

Study on Application of Novel Flocculating Agent in Treating Refinery Wastewater with High Concentration of Pollutants

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China Petroleum Processing & Petrochemical Technology 2009年第2期11卷 57-61页

作者： zhang baoji Qin Bing(SINOPEC Research Institute of Petroleum Processing,Beijing 100083) SINOPEC Research Institute of Petroleum Processing Beijing 100083 China

After conducting a lot of screening experiments the appropriate flocculating formulations for treating high-concentration wastewater discharged from a certain refinery were selected. The oil removal rate and COD removal achieved by these flocculating formulations were better than that achieved by the conventional compound formulation consisting of polyaluminium chloride(PAC) and polyacrylamide(PAA) . Addition of an oil/water separating agent to the formulation could improve its oil removal performance to facilitate the oil/water separation of the oil-in-water emulsion in the high-concentration wastewater along with improved adaptability of the formulation to the wastewater containing high concentration of pollutants. This flocculating agent has promising prospects for commercial application.

关键词：污染物浓度炼油废水中高浓度商业应用絮凝剂聚合氯化铝配方组成 COD去除率

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基于CFD的船用螺旋桨敞水性能预报

船舶工程 2022年第S01期44卷 288-293,311页

作者：刘亮张宝吉上海海事大学商船学院上海201306

为准确获得螺旋桨的敞水性能,采用CFD法对黏性流场中KP458型船用螺旋桨的敞水性能进行预报,对螺旋桨在不同进速系数下的推力系数、转矩系数、敞水效率、螺旋桨后方的尾流场、螺旋桨盘面的压力分布进行模拟,并获得螺旋桨的敞水性征曲线... 详细信息

为准确获得螺旋桨的敞水性能,采用CFD法对黏性流场中KP458型船用螺旋桨的敞水性能进行预报,对螺旋桨在不同进速系数下的推力系数、转矩系数、敞水效率、螺旋桨后方的尾流场、螺旋桨盘面的压力分布进行模拟,并获得螺旋桨的敞水性征曲线。对三维流场计算域采用Poly-Hexcore方法进行网格划分,并在相同进速系数下对4种不同网格数量的Poly-Hexcore网格系统进行网格无关性检验,并将数值模拟结果与试验测值进行比较,结果显示了很好的一致性。结果表明:利用CFD方法可真实、快速地获得螺旋桨后方的尾流场和螺旋桨盘面的压力分布规律,该方法的工程可靠性已获得验证。

关键词： CFD 螺旋桨敞水性能预报

Analysis of the Effect of Supplying Vessel on Wave Drift Force of Semi-Submersible Platform

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Open Journal of Modelling and Simulation 2019年第3期7卷 169-176页

作者： Chi zhang baoji zhang College of Ocean Science and Engineering Shanghai Maritime University Shanghai China

Wave drift force is the key factor affecting the mooring ability of semi-submersible platform. Aiming at the mooring system composed of replenishment ship and semi-submersible platform, the influence of hydrodynamic interference on semi-submersible platform is analyzed. Based on the three-dimensional potential flow theory and AQWA software, the effects of different wave directions and spacing on the wave drift force of semi-submersible platform are considered. The results show that the hydrodynamic interference of the replenishment ship will affect the wave drift force of the semi-submersible platform, and the influence of the distance between adjacent vessels and the wave direction angle is more sensitive in the middle and high wave frequencies. This paper can provide support for the research of hydrodynamic interference of semi-submersible platform.

关键词： Semi-Submersible AQWA Wave Drift Force Potential Theory

Study on Preparation and Application of Ti/Si Complex Zeolite

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China Petroleum Processing & Petrochemical Technology 2003年第3期5卷 49-52页

作者： zhang baoji Wang Xieqing(SINOPEC Research Institute of Petroleum Processing, Beijing 100083) SINOPEC Res. Inst. of Petroleum Processing Beijing 100083 China

A Ti/Si complex zeolite has been prepared. X-ray diffraction and infrared spectrometry study has shown that two structures, namely the ZSM-5 and MCM-41, exist in the sample. BET tests have revealed that the complex zeolite contains regular mesopores of 2.6 nm. Ultraviolet spectrometry analysis has shown that the Ti species exist in the zeolite skeleton in the form of tetra-coordinate valence. The Ti/Si complex zeolite (TS-1/Ti-MCM-41) has apparently improved catalytic activity with respect to the macromolecular organic compound oxidation as compared to individual components of either Ti or Si containing zeolites (TS- 1 and Ti-MCM-41).

关键词：钛硅沸石分子筛 TS 高分子有机化合物催化剂

Numerical Simulation of Resistance Field of Hull-Propeller-Rudder Coupling

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Journal of Marine Science 2021年第1期3卷 1-7页

作者： Hong Xie baoji zhang College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai201306China

Based on the incompressible RANS equation,the KVLCC1 ship’s resistance field’s numerical simulation is carried *** this paper,the bare hull(calm water resistance and wave resistance)and hull-propellerrudder models are studied and compared with the values of the Hydrostatic resistance *** the hull-propeller-rudder system’s performance analysis,the body force method is used to replace the real propeller *** new calculation domain is set for the hull-propeller-rudder system model and meshed again to obtain the highly reliable numerical simulation ***,the calculation results are *** research results in this paper can provide technical support for the resistance of similar ship types.

关键词： RANS method Hull-propeller-rudder Resistance Numerical simulation

在随浪、尾斜浪下ONR舰船骑浪横甩直接数值模拟

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上海海事大学学报 2022年第3期43卷 97-101页

作者：张宝吉王吴锐上海海事大学海洋科学与工程学院上海201306

为减小由横甩导致的船舶倾覆概率,以四自由度MMG操纵性方程为基础,通过增加艏向角来改变航向,增加横摇角来判断船舶是否倾覆,增加舵角控制方程来模拟舵效下降,对典型横甩现象进行模拟。以ONR舰船为例,在波长船长比为1、波陡为1/15的海况... 详细信息

为减小由横甩导致的船舶倾覆概率,以四自由度MMG操纵性方程为基础,通过增加艏向角来改变航向,增加横摇角来判断船舶是否倾覆,增加舵角控制方程来模拟舵效下降,对典型横甩现象进行模拟。以ONR舰船为例,在波长船长比为1、波陡为1/15的海况下,进行随浪和尾斜浪下的航行模拟。基于突然改变的理念成功模拟出该船的典型横甩现象,模拟结果与已有实验值基本一致,证实了本文所提出的ONR舰船骑浪横甩直接模拟方法的可靠性。

关键词：第二代完整稳性骑浪横甩直接数值模拟 ONR舰船

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