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Research and development of a digital design system for hull structures

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Journal of Marine Science and Application 2007年第2期6卷 37-43页

作者： ZHAN Yi-ting JI Zhuo-shang liu yin-dong Ship CAD Engineering Center Dalian University of Technology Dalian 116024 China Electromechanics ＆ Materials College Dalian Maritime University Dalian 116023 China

Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved in different 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design. Through operations such as model construction, intervention inspection, and collision detection, problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding.

关键词： digitalized design of ship hull structure ship CAD SolidWorks

Discovery of a new family member of arsenic–vanadium polyoxometalates with high catalytic performance for one-pot coupling of CO2, epoxides and amines

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Tungsten 2025年第1期7卷 80-87页

作者： Fang-Qian Wang yin Zhang Wei-Wei Wang Mei-Qian Fu Hong-Bing Mo Wei-dong Yu Chao liu Jun Yan College of Chemistry and Chemical Engineering Central South University Junior Education Department Changsha Normal University School of Science Hunan University of Technology and Business

Arsenic-vanadium polyoxometalates（POMs） represent a family of tremendous potential catalysts owing to their peculiar physical and chemical *** in CO2conversion,using POMs to catalyze the conversion of CO2and epoxide into chemical intermediates is the research ***,A new family number of arsenic-vanadium POMs,[N（CH3）4]4[As8V12O38（H2O）]·2H2O({As8V12O38}),was reported and characterized by single-crystal X-ray diffraction,fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,*** from other allotropicity,{As8V12O38}shows a different structure pattern with an I-43d *** obtained {As8V12O38} was employed as a catalyst for the *** initial catalytic reaction confirmed that {As8V12O38} can catalyze the formation of epoxy carbonate by using 1.01 kPa CO2and epoxide at 70℃.Furtherly,when added amine in the catalytic system,oxazolidinone could be obtained by high yields,which provides an efficient way to convert CO2into profitable ***,a possible catalytic reaction mechanism was proposed by using different characterization analyses.{As8V12O38} first catalyzes the epoxide and CO2to form an epoxy carbonate and then catalyzes epoxy carbonate and benzylamine into oxazolidinone.

关键词： Arsenic CO2 conversion Oxazolidinone Polyoxometalates Vanadium

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基于ANSYS的结构拓扑优化及其二次开发

船舶力学 2006年第2期10卷 120-125页

作者：刘寅东卞钢大连理工大学船舶工程学院大连116024

本文吸收了“基结构法”和“均匀化法”的思想,提出了“通过力传递的路径来构造拓扑”和“逐次去劣、两极分化”的拓扑优化新思路和方法,对有限元软件ANSYS的拓扑优化功能作了二次开发,拓展了ANSYS拓扑优化结构单元的适用种类,且不仅可... 详细信息

本文吸收了“基结构法”和“均匀化法”的思想,提出了“通过力传递的路径来构造拓扑”和“逐次去劣、两极分化”的拓扑优化新思路和方法,对有限元软件ANSYS的拓扑优化功能作了二次开发,拓展了ANSYS拓扑优化结构单元的适用种类,且不仅可以求解连续结构的拓扑优化问题,还可以求解桁架结构的拓扑优化问题,编制了相应程序考证了连续体和桁架两种类型的典型算例,最后将此方法应用于一个船舶板架结构优化中,得到了预期的结果。

关键词：结构分析拓扑优化 APDL 二次开发

基于反向学习遗传算法的船舶舱室布局优化方法

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大连海事大学学报 2021年第3期47卷 16-22页

作者：董增财刘寅东大连海事大学船舶与海洋工程学院辽宁大连116026

为实现舱室布置参数化、智能化,针对船舶舱室布局优化设计的特点,建立包括舱室间物流强度目标、邻近强度目标和固定位置目标的多目标优化模型.在建立数学模型基础上,运用基于反向学习优化种群产生法改进的遗传算法求解该模型,通过扩大... 详细信息

为实现舱室布置参数化、智能化,针对船舶舱室布局优化设计的特点,建立包括舱室间物流强度目标、邻近强度目标和固定位置目标的多目标优化模型.在建立数学模型基础上,运用基于反向学习优化种群产生法改进的遗传算法求解该模型,通过扩大解的搜索范围使其跳出局部最优,引导种群找到全局最优解.最后,运用建立的优化模型和改进后的遗传算法进行仿真实验,得到了更加合理的结果,验证了本文方法的可行性和有效性.

关键词：船舶舱室布局多目标优化遗传算法反向学习优化

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船体结构虚拟设计平台的实现

系统仿真学报 2006年第10期18卷 2761-2763,2766页

作者：战翌婷刘寅东大连理工大学船舶工程学院辽宁大连116024 大连海事大学机电与材料工程学院辽宁大连116023

通过研究船体结构产品模型的特点并结合现代造船模式,提出了基于面向对象、模块化的船舶数字化模型的建立方法。结合三维造型软件开发了船体结构虚拟设计平台,提供了从船体曲面建立、船体结构建模到结构装配仿真的基本操作与运算,将程... 详细信息

通过研究船体结构产品模型的特点并结合现代造船模式,提出了基于面向对象、模块化的船舶数字化模型的建立方法。结合三维造型软件开发了船体结构虚拟设计平台,提供了从船体曲面建立、船体结构建模到结构装配仿真的基本操作与运算,将程序的集中控制能力、数据库的集成管理能力和三维虚拟设计相结合,实现了船舶初步设计阶段数据产品模型的信息化集成设计与管理。

关键词：虚拟设计船体结构 SolidWorks VB.NE 产品模型

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浮船坞实时配载模型及算法

大连理工大学学报 2006年第6期46卷 857-861页

作者：孙承猛刘寅东大连理工大学船舶工程学院辽宁大连116024

探讨优化方法在浮船坞浮态实时调节中的应用.结合工程实际问题,依据静力学力平衡原理,以实际工程需要为目标,以各调节水舱实时水位为自变量,建立浮船坞实时配载优化模型.针对该模型,采用惩罚函数法求解,求解过程中运用了Pow e ll直接搜... 详细信息

探讨优化方法在浮船坞浮态实时调节中的应用.结合工程实际问题,依据静力学力平衡原理,以实际工程需要为目标,以各调节水舱实时水位为自变量,建立浮船坞实时配载优化模型.针对该模型,采用惩罚函数法求解,求解过程中运用了Pow e ll直接搜索法和成功-失败法.计算结果表明,算法中搜索起点的改变会对调水方案有所影响,但最优目标值非常接近.同时,该方法简便可行,可显著提高工作效率.特别是,该方法可以方便地考虑潮水水位变化对浮船坞浮态调节的影响,更适于实际应用.

关键词：非线性规划惩罚函数法配载浮态浮船坞

Decentralized fault diagnosis of discrete-event systems with unreliable sensors using linear temporal logic

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Science China(Information Sciences) 2025年第1期68卷 322-341页

作者： Weijie dong Shaoyuan LI Xiang yin Key Laboratory of System Control and Information Processing Ministry of EducationDepartment of Automation Shanghai Jiao Tong University

In this paper,we investigate a decentralized diagnosis problem of a discrete-evnt system(DES) subject to unreliable sensors,where the sensor observations of local diagnosers may be non-deterministic as a result of possible *** studies on decentralized robust diagnosis can only deal with different types of sensor failures separately,e.g.,all sensors suffer from the same type of sensor failures such as intermittent sensor failures or permanent sensor ***,since sensors of different local diagnosers may face different external environments and have different internal characteristics,sensors corresponding to different local diagnosers may also have their own fault *** this paper,we propose a flexible framework of decentralized diagnosis for DES subject to unreliable sensors such that sensors of different local diagnosers are permitted to have different types of sensor *** this end,we extend the existing decentralized diagnosis framework to the case where there exist common sensors broadcasting their observations to all local *** apply linear temporal logic(LTL) to constrain infinite behaviors of private sensors of local diagnosers and common ***,a new notion of φ-codiagnosability is proposed as the necessary and sufficient condition for the existence of a decentralized diagnoser that works correctly under sensors,satisfying LTL-based sensor ***,we provide an effective approach to verify the φ-codiagnosability.

关键词： discrete event systems decentralized diagnosis codiagnosability automata

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作业水深对浮式平台气隙的影响机理研究

船舶力学 2019年第10期23卷 1187-1197页

作者：沈中祥刘寅东霍发力尹群江苏科技大学土木工程与建筑学院江苏镇江212003 江苏科技大学海洋装备研究院江苏镇江212003 大连海事大学船舶与海洋工程学院辽宁大连116026 江苏科技大学船舶与海洋工程学院江苏镇江212003

本文结合模型试验,基于数值重构后的计算模型,采用时域全耦合分析方法,探索了作业水深对平台气隙的影响规律;针对作业水深对浮式平台系泊系统刚度、系泊力的影响特性进行了深入分析,揭示其对气隙的影响机理。研究结果表明:浮式平台关注... 详细信息

本文结合模型试验,基于数值重构后的计算模型,采用时域全耦合分析方法,探索了作业水深对平台气隙的影响规律;针对作业水深对浮式平台系泊系统刚度、系泊力的影响特性进行了深入分析,揭示其对气隙的影响机理。研究结果表明:浮式平台关注点处负气隙对作业水深的影响较敏感,平台的运动响应能量谱受工作水深的影响显著,在同等环境工况下,关注点处负气隙随着作业水深的增加进一步加剧。随着作业水深的增加,系泊系统刚度呈现出减小趋势,平台系统的恢复力变弱,平台的运动增强,导致平台的垂向位移发生变化,平台发生负气隙的概率增大。水深变化引起的波浪砰击严重影响平台作业安全,在实际工程设计中要充分考虑工作水深对平台气隙运动的影响。

关键词：作业水深浮式平台气隙系泊刚度系泊力

Investigation of bubbles escape behavior from low basicity mold flux for high-Mn high-Al steels using 3D X-ray microscope

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 102-110页

作者： Qiang liu Xiang Li Shen Du Ming Gao Yanbin yin Jiongming Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

During the continuous casting process of high-Mn high-Al steels,various types of gases such as Ar need to escape through the top of the *** which,the behavior of bubbles traversing the liquid slag serves as a restrictive link,closely associated with viscosity and the thickness of liquid *** contrast to two-dimensional surface observation,three-dimensional(3D)analysis method can offer a more intuitive,accurate,and comprehensive ***,this study employs a 3D X-ray microscope(3D-XRM)to obtained spatial distribution and 3D morphological characteristics of residual bubbles in mold flux under different basicity of liquid slag,different temperatures,and different holding *** results indicate that as basicity of slag increases from 0.52 to 1.03,temperature increases from 1423 to 1573 K,the viscosity of slag decreases,the floating rate of bubbles *** addition,when holding time increases from 10 to 30 s,the bubbles floating distance increases,and the volume fraction and average equivalent sphere diameter of the bubbles solidified in the mold flux gradually *** one word,increasing the basicity,temperature,and holding time leading to an increase in the removal rate of bubbles especially for the *** findings of bubbles escape behavior provide valuable insights into optimizing low basicity mold flux for high-Mn high-Al steels.

关键词： mold flux low basicity bubbles three-dimensional X-ray microscope viscosity