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Branch-pipe-routing approach for ships using improved genetic algorithm

Haiteng SUI,Wentie NIU

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 316-323 doi: 10.1007/s11465-016-0384-z

Abstract:

Branch-pipe routing plays fundamental and critical roles in ship-pipe design. The branch-pipe-routing problem is a complex combinatorial optimization problem and is thus difficult to solve when depending only on human experts. A modified genetic-algorithm-based approach is proposed in this paper to solve this problem. The simplified layout space is first divided into three-dimensional (3D) grids to build its mathematical model. Branch pipes in layout space are regarded as a combination of several two-point pipes, and the pipe route between two connection points is generated using an improved maze algorithm. The coding of branch pipes is then defined, and the genetic operators are devised, especially the complete crossover strategy that greatly accelerates the convergence speed. Finally, simulation tests demonstrate the performance of proposed method.

Keywords： branch pipe     ship industry     piping system     optimization algorithm    

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3D finite element method (FEM) simulation of groundwater flow during backward erosion piping

Kristine VANDENBOER,Vera van BEEK,Adam BEZUIJEN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 160-166 doi: 10.1007/s11709-014-0257-7

Abstract: Backward erosion piping is an important failure mechanism for cohesive water retaining structures which3D numerical approach of the groundwater flow leading to the erosion mechanism of backward erosion pipingComparison of the 2D and 3D numerical results explicitly demonstrates the inherent 3D nature of the pipingIn addition, the influence of the seepage length is investigated and discussed for both piping initiationand piping progression.

Keywords： backward erosion piping     groundwater flow     3D finite element method (FEM)    

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Study on electrical insulation property of the insulating sealing gaskets for warship piping system

Li Zhuying,Cao Wenkang,Liu Ye and Zhang Xiaodong

Strategic Study of CAE 2015, Volume 17, Issue 5,   Pages 58-62

Abstract:

The asbestos rubber fiber gaskets and epoxy gaskets were soaked in the seawater， alkaline solution（ 10 % NaOH ）， acid solution（10 % H2SO4） and heavy oil， and the variation of the volume resistivity and surface resistivity of the gaskets with soaking time were studied. The results showed that the wet resistivity of the asbestos rubber fiber gaskets reduced to 102 Ω（ or Ω?cm）level when being soaked in the alkaline solution and acid solution for two months and the period of validity of the insulation was inferred to four months in seawater， and however， the wet resistivity of the epoxy gaskets could remain 104~6 Ω（or Ω?cm） level， and as the conclusion， the performance of the insulation of the epoxy gaskets is much better than that of asbestos rubber fiber gaskets.

Keywords： asbestos rubber fiber gasket；epoxy gasket；resistivity    

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System reliability and system resilience

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 615-619 doi: 10.1007/s42524-021-0176-y

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Engineering, Engineering System, Engineering System Theory, and System of Engineering Science

Wang Liancheng

Strategic Study of CAE 2001, Volume 3, Issue 6,   Pages 15-18

Abstract: of basic contents, nature and feature of engineering, this paper introduces concepts of engineering systemand engineering system theory, then discusses objects of study and research methods of engineering systemtheory using thinking of general system theory.Finally, it expounds meta-discipline standing of engineering system theory in system of engineering science

Keywords： engineering     system     system theory     discipline    

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Cyber–Physical Power System (CPPS): A review on measures and optimization methods of system resilience

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 503-518 doi: 10.1007/s42524-021-0163-3

Abstract: The Cyber–Physical Power System (CPPS) is one of the most critical infrastructure systems in a country

Keywords： Cyber–Physical Power System     resilience assessment     resilience optimization     cascading failure modeling    

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Discussion on the System Optimization of the Energy Development Strategy and Plan

Da-di Zhou

Frontiers of Engineering Management 2014, Volume 1, Issue 2,   Pages 147-152 doi: 10.15302/J-FEM-2014022

Abstract: Due to the complexity of the energy system, the interactive relationship with economic and social development, and the enormous investment involved, the optimization of the energy system is of great significanceefforts to develop targets and specific approaches for the rational and optimal development of an energy system

Keywords： energy development strategy     planning system     system optimization    

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Distributed monitoring and diagnosis system for hydraulic system of construction machinery

Xiaohu CHEN, Wenfeng WU, Hangong WANG, Yongtao ZHOU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 106-110 doi: 10.1007/s11465-009-0089-7

Abstract: This paper mainly presents a distributed monitoring and diagnosis system for the hydraulic system ofThe hardware of the distributed condition monitoring and fault diagnosis system is designed.experiments and applications indicate that the distributed condition monitoring and fault diagnosis systemrealize its function of real-time online condition monitoring and fault diagnosis for the hydraulic system

Keywords： construction machinery     hydraulic system     distributed condition monitoring     controller area net (CAN) field    

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Theory and method of mechanism system design

Huijun ZOU, Qinghua LIANG, Qing ZHANG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 399-411 doi: 10.1007/s11465-010-0116-8

Abstract: Conceptual design is the most critical and creative phase of design. Recently, increasing attention has been directed to supporting conceptual-level computer aided creative design and its theories and methodologies. Specifically, for conceptual design of mechanical products, this paper presents a novel function solving model for mechanical product design and highlights the importance of systematic synthesis to achieve creative design. Then it builds a framework as a function-effect-process-action- mechanisms (FEPAM) mapping process, which enables creative design on the basis of conceiving different action schemes. After that, several key points are elaborated including 1) representing and decomposition methods of functions and motion behaviors; 2) action scheme representing method based on network plan techniques; and 3) variation and creation methods based on action scheme transformations.

Keywords： mechanism system creative design     process model     function solving model     process action procedure     mechanismsknowledge base     principle of mechanism system composition    

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Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 184-192 doi: 10.1007/s11708-012-0185-y

Abstract: from the grid during disturbances with advanced power electronics controllers and reduce equivalent systemThus, it is important that wind turbines also contribute to system frequency control.paper examines the dynamic contribution of doubly fed induction generator (DFIG)-based wind turbine in systemThe simulations carried out in a two-area interconnected power system demonstrate the contribution of

Keywords： doubly fed induction generator (DFIG)     load frequency control     inertial control     wind energy conversion system    

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Load frequency control in deregulated power system with wind integrated system using fuzzy controller

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 245-254 doi: 10.1007/s11708-012-0218-6

Abstract: presents the analysis of load frequency control (LFC) of a deregulated two-area hydro-thermal power systemThe conventional two-area power system is modified to study the effects of the bilateral contracts ofcompanies on the system dynamics.The overall inertia of the system reduces, as the wind unit does not provide inertia and isolates fromThe DFIGs integrated provide inertial support to the system through modified inertial control scheme,

Keywords： frequency regulation     fuzzy controller     de-regulated power system     doubly fed induction generator (DFIG)    

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Qian Xuesen and System Engineering

Miao Dongsheng

Strategic Study of CAE 2002, Volume 4, Issue 3,   Pages 16-20

Abstract:

This paper have looked back the formation of Qian Xuesen's system engineering idea, given a briefaccount of the main points of the system engineering theory with Chinese characteristics, and analysedhow Qian went beyond system engineering.

Keywords： Qian Xuesen     system idea     system engineering     system science    

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China’s hydropower energy system toward carbon neutrality

Frontiers of Engineering Management   Pages 677-682 doi: 10.1007/s42524-022-0196-2

Abstract: stochasticity, high volatility, and unadjustable features, have great impacts on the safe operation of power systemThus, an advanced hydropower energy system serving multiple energies is required to respond to volatilityFuture research and application can be considered from three aspects: 1) system expansion (e.g., the

Keywords： hydropower system     carbon neutrality     artificial intelligence    

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Co-design and Co-simulation on the System Level

Xu Hui,Wang Zuqiang,Wang Zhaojun

Strategic Study of CAE 2006, Volume 8, Issue 4,   Pages 86-88

Abstract:

The article introduces the technology of co-design and co-simulation on the system level and the systemsimulation tool-Cocentric system studio.

Keywords： system on a chip     software/hardware co-simulate     system C     CCSS (CoCentric system studio)    

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Steam turbine governor modeling and parameters testing for power system simulation

Ying LI, Chufeng PENG, Zenghui YANG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 198-203 doi: 10.1007/s11708-009-0004-2

Abstract: A set of ST Governor system model for power system simulation is created based on this research.A power system simulation for an actual power grid accident is conducted using this new model and the

Keywords： power system simulation     ST governor system     modeling     parameters testing    

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Title Author Date Type Operation

Branch-pipe-routing approach for ships using improved genetic algorithm

Haiteng SUI,Wentie NIU

Journal Article

3D finite element method (FEM) simulation of groundwater flow during backward erosion piping

Kristine VANDENBOER,Vera van BEEK,Adam BEZUIJEN

Journal Article

Study on electrical insulation property of the insulating sealing gaskets for warship piping system

Li Zhuying,Cao Wenkang,Liu Ye and Zhang Xiaodong

Journal Article

System reliability and system resilience

Journal Article

Engineering, Engineering System, Engineering System Theory, and System of Engineering Science

Wang Liancheng

Journal Article

Cyber–Physical Power System (CPPS): A review on measures and optimization methods of system resilience

Journal Article

Discussion on the System Optimization of the Energy Development Strategy and Plan

Da-di Zhou

Journal Article

Distributed monitoring and diagnosis system for hydraulic system of construction machinery

Xiaohu CHEN, Wenfeng WU, Hangong WANG, Yongtao ZHOU,

Journal Article

Theory and method of mechanism system design

Huijun ZOU, Qinghua LIANG, Qing ZHANG

Journal Article

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Load frequency control in deregulated power system with wind integrated system using fuzzy controller

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Qian Xuesen and System Engineering

Miao Dongsheng

Journal Article

China’s hydropower energy system toward carbon neutrality

Journal Article

Co-design and Co-simulation on the System Level

Xu Hui,Wang Zuqiang,Wang Zhaojun

Journal Article

Steam turbine governor modeling and parameters testing for power system simulation

Ying LI, Chufeng PENG, Zenghui YANG

Journal Article