Polish Maritime Research最新文献_第9页

Autonomous Control of the Underwater Remotely Operated Vehicle in Collision Situation with Stationary Obstacle 水下遥控车辆与静止障碍物碰撞时的自主控制

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-12-01 DOI: 10.2478/pomr-2022-0043

R. Smierzchalski, Maciej Kapczyński

引用次数: 1

Flow Field Characteristic Analysis of Cushion System of Partial Air Cushion Support Catamaran in Regular Waves 规则波中部分气垫支撑双体船缓冲系统流场特性分析

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0024

Jinglei Yang, Hanbing Sun, Xiao-wen Li, Xin Liu

{"title":"Flow Field Characteristic Analysis of Cushion System of Partial Air Cushion Support Catamaran in Regular Waves","authors":"Jinglei Yang, Hanbing Sun, Xiao-wen Li, Xin Liu","doi":"10.2478/pomr-2022-0024","DOIUrl":"https://doi.org/10.2478/pomr-2022-0024","url":null,"abstract":"Abstract In order to study the flow field characteristics of cushion system of partial air cushion support catamaran (PACSCAT) in waves, an analysis was carried out involving flexible treatment on the bow and stern air seals to simulate air seal shape under test conditions by means of computational fluid dynamics method and fluid structure interaction (FSI) method. On this basis, the pressure conditions of the air cushion chamber and the pressurized chamber at different wavelengths and different speeds are studied and compared with experimental results. The experimental results show that: for the air cushion pressure, the nonlinear characteristics of the numerical calculation results are more subtle than the experimental values, after linear transformation, the amplitudes of the experimental values are obviously greater than the calculated values after linear transformation, but the average values are not much different; At low speed of 2.0m/s, the spatial pressure distribution of the pressurized chamber and the air cushion chamber are uniformly distributed, at high speed of 3.6m/s, except for a certain pressure jump occurred in the air cushion chamber near the stern air seal, the pressure in other spaces is also evenly distributed, it proves that the pressurized chamber type of air intake can effectively meet the air cushion pressure balance.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"21 - 32"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44628454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding 材料厚度对造船用钢板韧性断裂的影响

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0036

J. Kowalski, J. Kozák

{"title":"Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding","authors":"J. Kowalski, J. Kozák","doi":"10.2478/pomr-2022-0036","DOIUrl":"https://doi.org/10.2478/pomr-2022-0036","url":null,"abstract":"Abstract In the shipbuilding industry, the risk of brittle fractures is relatively high because some units operate in arctic or subarctic zones and use high thickness (up to 100 mm) steel plates in their structures. This risk is limited by employing certified materials with a specific impact strength, determined using the Charpy method (for a given design temperature) and by exercising control over the welding processes (technology qualification, production supervision, and non-destructive tests). However, for offshore constructions, such requirements may prove insufficient. For this reason, regulations employed in constructing offshore structures require conducting crack tip opening displacement (CTOD) tests for steel and welded joints with thicknesses exceeding 40 mm for high tensile strength steel and 50 mm for other steel types. Since classification codes do not accept the results of CTOD tests conducted on specimens of sub-sized dimensions, the problem of theoretically modelling the steel construction destruction process is of key importance, as laboratory tests for notched elements of considerable thickness (100 mm and higher) are costly and problems stemming from high loads and a wide range of recorded parameters are not uncommon. The aim of this research is to find a relationship between material thickness and CTOD value, by establishing and verifying a numerical model that allows recalculating a result obtained on a sub-size specimen to a full- size specimen for a ductile fracture mode. This work presents results and conclusions from numerical modelling and compares them with laboratory test results of the elastic-plastic properties of high thickness steel, typically used in offshore applications.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"160 - 166"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44680351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mathematical Modelling of Marine Power Plants with Thermochemical Fuel Treatment 采用热化学燃料处理的船用发电厂数学模型

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0030

Oleksandr Cherednichenko, S. Serbin, Mykhaylo Tkach, J. Kowalski, Daifen Chen

{"title":"Mathematical Modelling of Marine Power Plants with Thermochemical Fuel Treatment","authors":"Oleksandr Cherednichenko, S. Serbin, Mykhaylo Tkach, J. Kowalski, Daifen Chen","doi":"10.2478/pomr-2022-0030","DOIUrl":"https://doi.org/10.2478/pomr-2022-0030","url":null,"abstract":"Abstract The article considers the methodological aspects of the theoretical investigation of marine power plants with thermochemical fuel treatment. The results of the study of the complex influence of temperature, pressure, and the ratio of steam / base fuel on the thermochemical treatment efficiency are presented. The adequacy of the obtained regression dependences was confirmed by the physical modelling of thermochemical fuel treatment processes. For a gas turbine power complex with a thermochemical fuel treatment system, the characteristics of the power equipment were determined separately with further merging of the obtained results and a combination of material and energy flow models. Algorithms, which provide settings for the mathematical models of structural and functional blocks, the optimisation of thermochemical energy transformations, and verification of developed models according to the indicators of existing gas turbine engines, were created. The influence of mechanical energy consumption during the organisation of thermochemical processing of fuel on the efficiency of thermochemical recuperation is analysed.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"99 - 108"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44580473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

An Improved Dynamic Surface Sliding Mode Method for Autonomous Cooperative Formation Control of Underactuated USVS with Complex Marine Environment Disturbances 复杂海洋环境扰动下欠驱动usv自主协同编队控制的改进动态表面滑模方法

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0025

Zaopeng Dong, Shijie Qi, Min Yu, Zheng Zhang, Haisheng Zhang, Jiakang Li, Yang Liu

{"title":"An Improved Dynamic Surface Sliding Mode Method for Autonomous Cooperative Formation Control of Underactuated USVS with Complex Marine Environment Disturbances","authors":"Zaopeng Dong, Shijie Qi, Min Yu, Zheng Zhang, Haisheng Zhang, Jiakang Li, Yang Liu","doi":"10.2478/pomr-2022-0025","DOIUrl":"https://doi.org/10.2478/pomr-2022-0025","url":null,"abstract":"Abstract In this paper, a novel dynamic surface sliding mode control (DSSMC) method, combined with a lateral velocity tracking differentiator (LVTD), is proposed for the cooperative formation control of underactuated unmanned surface vehicles (USVs) exposed to complex marine environment disturbances. Firstly, in view of the kinematic and dynamic models of USVs and the design idea of a virtual control law in a backstepping approach, the trajectory tracking control problem of USVs’ cooperative formation is transformed into a stabilisation problem of the virtual control law of longitudinal and lateral velocities. Then, aiming at the problem of differential explosion caused by repeated derivation in the process of backstepping design, the first-order low-pass filter about the virtual longitudinal velocity and intermediate state quantity of position is constructed to replace differential calculations during the design of the control law, respectively. In order to reduce the steady-state error when stabilising the virtual lateral velocity control law, the integral term is introduced into the design of the sliding mode surface with a lateral velocity error, and then the second-order sliding mode surface with an integral is structured. In addition, due to the problem of controller oscillation and the role of the tracking differentiator (TD) in active disturbance rejection control (ADRC), the LVTD is designed to smooth the state quantity of lateral velocity. Subsequently, based on the dynamic model of USV under complex marine environment disturbances, the nonlinear disturbance observer is designed to observe the disturbances and compensate the control law. Finally, the whole cooperative formation system is proved to be uniformly and ultimately bounded, according to the Lyapunov stability theory, and the stability and validity of the method is also verified by the simulation results.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"47 - 60"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42139619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect 基于马格纳斯效应的半潜船辅助推进装置

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0023

Jing Lv, Yiqun Lin, Rui Zhang, Boyang Li, Hualin Yang

{"title":"Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect","authors":"Jing Lv, Yiqun Lin, Rui Zhang, Boyang Li, Hualin Yang","doi":"10.2478/pomr-2022-0023","DOIUrl":"https://doi.org/10.2478/pomr-2022-0023","url":null,"abstract":"Abstract The purpose of this study is to explore the potentiality of wind propulsion on semi-submersible ships. A new type of Flettner rotor (two rotating cylinders) system installed on a semi-submersible ship is proposed. The structure and installation of two cylinders with a height of 20 m and a diameter of 14 m are introduced. The numerical simulation of the cylinder is carried out in Fluent software. The influence of apparent wind angle and spin ratio on the two cylinders are analysed, when the distance between two cylinders is 3D-13D (D is cylinder diameter). When the distance between two cylinders is 3D, the performance of the system increases with an increase in spin ratio. Moreover, the apparent wind angle also has an effect on the system performance. Specifically, the thrust contribution of the system at the apparent wind angle of 120° is the largest at the spin ratio of 3.0. The maximum thrust reaches 500 kN. When the spin ratio is 2.5 and the apparent wind angle is 120°, the maximum effective power of the system is 1734 kW. In addition, the influence of the two cylinders distance on system performance cannot be ignored. When the distance between the two cylinders is 7D and the spin ratio is 2.5, the effective power of the system reaches a maximum, which is 1932 kW.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"33 - 46"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46698738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the Risk Classification of Cruise Ship Fires Based on an Attention-Bp Neural Network 基于注意力- bp神经网络的游轮火灾风险分类研究

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0026

Zhenghua Xiong, Bo Xiang, Ye Chen, Bin-bing Chen

{"title":"Research on the Risk Classification of Cruise Ship Fires Based on an Attention-Bp Neural Network","authors":"Zhenghua Xiong, Bo Xiang, Ye Chen, Bin-bing Chen","doi":"10.2478/pomr-2022-0026","DOIUrl":"https://doi.org/10.2478/pomr-2022-0026","url":null,"abstract":"Abstract Due to the relatively closed environment, complex internal structure, and difficult evacuation of personnel, it is more difficult to prevent ship fires than land fires. In this paper, taking the large cruise ship as the research object, the physical model of a cruise cabin fire is established through PyroSim software, and the safety indexes such as smoke temperature, CO concentration, and visibility are numerically simulated. An Attention-BP neural network model is designed for realizing the intelligent identification of a cabin fire and dividing the risk level, which integrates the diagnosis results of multiple neural network models through the self-Attention mechanism and adaptively distributes the weight of each BP neural network model. The proposed model can provide decision-making reference for subsequent fire-fighting measures and personnel evacuation. Experimental results show that the proposed Attention-BP neural network model can effectively realize the early warning of the fire risk level. Compared with other machine learning algorithms, it has the highest stability and accuracy and reduces the uncertainty of early cabin fire warning.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"61 - 68"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42921991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An Innovative Method of Measuring the Extension of the Piston Rod in Hydraulic Cylinders, Especially Large Ones Used in the Shipbuilding and Offshore Industry 一种新颖的测量液压缸活塞杆延伸量的方法，特别是在船舶和海洋工业中使用的大型液压缸

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0035

P. Dymarski, C. Dymarski, Piotr Grymajło

引用次数: 0

Jacking and Energy Consumption Control Over Network for Jack-Up Rig: Simulation and Experiment 自升式钻井平台的网络顶升与能耗控制:仿真与实验

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0029

V. Do, X. Dang, Tien-Dat Tran, Thi-Duyen-Anh Pham

{"title":"Jacking and Energy Consumption Control Over Network for Jack-Up Rig: Simulation and Experiment","authors":"V. Do, X. Dang, Tien-Dat Tran, Thi-Duyen-Anh Pham","doi":"10.2478/pomr-2022-0029","DOIUrl":"https://doi.org/10.2478/pomr-2022-0029","url":null,"abstract":"Abstract Oil and gas projects differ from regular investment projects in that they are frequently large-scale, categorised as vital national projects, highly technological, and associated with significant risks. Drilling rigs are a crucial component of the oil and gas sector and the majority of the systems and equipment aboard drilling rigs are operated automatically. Consequently, it is crucial to address the topic of an advanced control theory for off-shore systems. Network technology connected to control is progressively being used to replace outdated technologies, together with other contemporary technologies. In this study, we examine how to adapt a networked control jacking system to the effects of internal and external disturbances with a time delay, using a Fuzzy controller (FC)-based particle swarm optimisation. To demonstrate the benefit of the proposed approach, the developed Fuzzy Particle Swarm Optimisation (FPSO) controller is compared with the fuzzy controller. Finally, the results from simulations and experiments utilising Matlab software and embedded systems demonstrate the suitability of the proposed approach.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":"29 1","pages":"89 - 98"},"PeriodicalIF":2.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44274999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization Model to Manage Ship Fuel Consumption and Navigation Time 船舶燃油消耗和航行时间管理的优化模型

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2022-09-01 DOI: 10.2478/pomr-2022-0034

K. Rudzki, P. Gomułka, A. T. Hoang

引用次数: 17