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A Two-Level Cross-Sectional Optimization Approach for Automotive Body concept design

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Automotive Innovation 2018年第2期1卷 122-130页

作者： Huan Qin Zijian Liu Yu Liu Haolong Zhong State Key Laboratory of Advanced design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

concept design is vital important in development of auto-body and it has great effects on later design *** this paper,a twolevel cross-sectional optimization approach is presented to shorten concept design ***,an exact structural analysis approach for spatial semi-rigid framed structures,i.e.,the transfer stiffness matrix method proposed in our previous study,is adopted for both static and dynamic analyses of body-in-white(BIW)structure.A two-level cross-sectional optimization approach is then proposed for an automotive BIW lightweight design,and genetic algorithm is used to solve the optimization ***,an object-oriented MATLAB toolbox,using distributed parallel computing techniques,is developed to promote the concept design of the BIW ***,relevant numerical examples demonstrate the validity and accuracy of the proposed method.

关键词： BIW structure concept design TSMM Cross-sectional optimization MATLAB toolbox Distributed parallel computing

concept design of Urban Bridges

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维普期刊数据库

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Concept Design of Urban Bridges

Application and Research of concept design for Modern Enterprise

2004年世界工程师大会

作者： Hu Zhijian, Liu Hong, Xiao QiDepartment of Bridge Engineering, Tongji University, Shanghai Huanggang Chucai Road & Bridge Ltd, Huanggang, Hubei Province Jiangxi Highway Beaurue, Nanchang, Jiangxi Province

＜正＞ with the development of cities more and more urban bridges have been built. But engineers always seek to satisfy the traffic functions of the urban bridges but neglect their other functions such as sus-tainability and aesthetics. In this paper some concepts of urban bridges design have been discussed. They are original or creative, sustainability, being landmarks, aesthetics, harmonious with environments, transparency and construction feasibility.

关键词： urban bridges concept design transportation system engineering structures

来源： cnki会议评论

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厦门大学学报（自然科学版） 2002年第S1期41卷 180-页

作者： XIONG Man-chen, ZHANG Yu (School of Mechanic and Electronic Engineering, Kunming University of Science and Technology, Kunming 650093, China)

Facing with the ever changing effect of internation al and domestic environments, purely new questions, higher requirements, more chal lenges and opportunities, the conventional management pattern of enterprise seem s to be very limited. concept design is a modern design method of sustainable de velopment strategy rather than a simple design of a certain level within an ente rprise. The digital virtual integration system, which is established on the basi s of concept design, focuses on the comprehensive balance of enterprise developm ent orientation, advanced technology of manufacturing industry and various scien ces, pours into an enterprise a rational, modern and foresight concept and provi des an enterprise with a scientific base to learn from the developed countries a nd regions in the light of its own actuality and characteristics with the final aim to make a perfect and correct decision.

关键词： concept design VIMS modern enterprise manageme nt pattern

design and Optimization for the Occupant Restraint System of Vehicle Based on a Single Freedom Model

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Chinese Journal of Mechanical Engineering 2013年第3期26卷 492-497页

作者： ZHANG Junyuan MA Yue CHEN Chao ZHANG Yan State Key Laboratory of Automobile Simulation and Control Jilin University

Throughout the vehicle crash event, the interactions between vehicle, occupant, restraint system (VOR) are complicated and highly non-linear. CAE and physical tests are the most widely used in vehicle passive safety development, but they can only be done with the detailed 3D model or physical samples. Often some design errors and imperfections are difficult to correct at that time, and a large amount of time will be needed. A restraint system concept design approach which based on single-degree-of-freedom occupant-vehicle model (SDOF) is proposed in this paper. The interactions between the restraint system parameters and the occupant responses in a crash are studied from the view of mechanics and energy. The discrete input and the iterative algorithm method are applied to the SDOF model to get the occupant responses quickly for arbitrary excitations (impact pulse) by MATLAB. By studying the relationships between the ridedown efficiency, the restraint stiffness, and the occupant response, the design principle of the restraint stiffness aiming to reduce occupant injury level during conceptual design is represented. Higher ridedown efficiency means more occupant energy absorbed by the vehicle, but the research result shows that higher ridedown efficiency does not mean lower occupant injury level. A proper restraint system design principle depends on two aspects. On one hand,the restraint system should lead to as high ridedown efficiency as possible, and at the same time, the restraint system should maximize use of the survival space to reduce the occupant deceleration level. As an example, an optimization of a passenger vehicle restraint system is designed by the concept design method above, and the final results are validated by MADYMO, which is the most widely used software in restraint system design, and the sled test. Consequently, a guideline and method for the occupant restraint system concept design is established in this paper.

关键词： vehicle crash occupant restraint system concept design single-degree-of-freedom occupant-vehicle model

Establishment and Validation for the Theoretical Model of the Vehicle Airbag

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Chinese Journal of Mechanical Engineering 2015年第3期28卷 487-495页

作者： ZHANG Junyuan JIN Yang XIE Lizhe CHEN Chao State Key Laboratory of Automobile Simulation and Control Jilin University China Automotive Technology & Research Center

The current design and optimization of the occupant restraint system（ORS） are based on numerous actual tests and mathematic simulations. These two methods are overly time-consuming and complex for the concept design phase of the ORS, though they＇re quite effective and accurate. Therefore, a fast and directive method of the design and optimization is needed in the concept design phase of the ORS. Since the airbag system is a crucial part of the ORS, in this paper, a theoretical model for the vehicle airbag is established in order to clarify the interaction between occupants and airbags, and further a fast design and optimization method of airbags in the concept design phase is made based on the proposed theoretical model. First, the theoretical expression of the simplified mechanical relationship between the airbag＇s design parameters and the occupant response is developed based on classical mechanics, then the momentum theorem and the ideal gas state equation are adopted to illustrate the relationship between airbag＇s design parameters and occupant response. By using MATLAB software, the iterative algorithm method and discrete variables are applied to the solution of the proposed theoretical model with a random input in a certain scope. And validations by MADYMO software prove the validity and accuracy of this theoretical model in two principal design parameters, the inflated gas mass and vent diameter, within a regular range. This research contributes to a deeper comprehension of the relation between occupants and airbags, further a fast design and optimization method for airbags＇ principal parameters in the concept design phase, and provides the range of the airbag＇s initial design parameters for the subsequent CAE simulations and actual tests.

关键词： occupant restraint systems airbag theoretical model concept design

A systematic literature review of human-centered design approach in single pilot operations

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Chinese Journal of Aeronautics 2023年第11期36卷 1-23页

作者： Guoqing WANG Min LI Miao WANG Dongjin DING School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200241China China Eastern Airlines Corporation Limited Shanghai 201100China

Single Pilot Operations(SPO),as a NextGen concept of operation,can save both crew costs and human resources for airlines,and has attracted the attention of aviation *** explore in advance the problems that the introduction of SPO into the aviation system would bring,the Human-Centered design(HCD)approach has been widely used in the development of SPO.A systematic review of the progress of HCD approach in SPO research can promote further development of *** this paper,the literature resources of SPO were firstly retrieved from scientific research databases by subject search and were used as the input of scientometric analysis to obtain the highly cited literature,the number of annual publications,and the co-authorship network,which enables readers to understand the research trends and research groups of current ***,the development,application,and research process of the HCD approach were introduced in detail,and the progress of the HCD approach in SPO research was reviewed systematically from three aspects:concept design,function allocation,and system ***,limitations of current SPO research and future research directions for applying the HCD approach to SPO were also discussed.

关键词： concept design Function allocation Human-Centered design(HCD) Scientometric analysis Single Pilot Operations(SPO) System evaluation

conceptual design of the ITER Gas Injection System

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Plasma Science and Technology 2013年第3期15卷 287-290页

作者：杨愚 S.MARUYAMA G.KISS 李伟江涛李波 ITER Organization Route de Vinon sur Verdon Southwestern Institute of Physics

A conceptual design review of the ITER gas injection system （GIS） function, safety, operation, and maintenance has recently been successfully completed. The GIS design can now continue to the preliminary design stage. This paper gives an overall description of the requirements and implementation at the concept design level. The designs of the sub-systems according to its breakdown structure are discussed against the corresponding requirements.

关键词： ITER gas injection system system requirements concept design

Interactive sculpting of product shape based on constraint manipulation in virtual environment

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第7期6卷 733-740页

作者：刘振宇谭建荣 State Key Laboratory of CAD & CG Zhejiang University

In product concept design, not only designers with professional CAD skills, but also final customers take part in the design and evaluation of product shape styling. Because customers usually lack surface modelling background and are not familiar with concrete operations of commercial CAD systems, it is difficult for them to express their change intentions of product shape through professional CAD tools if they are not satisfied with the current shape design. This paper puts forward a method for creating, dragging and manipulating constraint and load represented in form of icon entity in interactive sculpting of product shape in virtual environment. The method supports customers manipulation of sculpting constraints or loads on sculpting shapes in virtual reality interaction to control the deformation of product shape. Constraints management based on icon entity is similar to spline lofting operation that is familiar to engineers, so users do not need to know surface details or have any professional knowledge of surface modelling, by only using their physical and engineering experience, they can manipulate the sculpting of product shape intuitively.

关键词： Virtual design Constraint manipulation Shape sculpting concept design

Coupled dynamic response analysis of multi-column floating offshore wind turbine with low center of gravity

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Journal of Ocean Engineering and Science 2024年第1期9卷 25-39页

作者： Jie Yang Yan-ping He Yong-sheng Zhao Xiao-yan Yang Guo-rong Zhang State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200240China School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Maritime and Transportation Ningbo UniversityNingbo 315211China

To realize the application of the floating offshore wind turbine(FOWT)from deep to relatively shallow waters,a new concept of multi-column floating wind turbine platform with low center of gravity(CG)is designed and *** multi-column low CG platform is designed to support a 6MW wind turbine class and operated at a water depth of 50m in the South China *** frequency domain software WADAM and time domain software NREL-FAST are used to simulate coupled dynamic responses of the floating wind turbine system with second-order wave loads *** dynamic behaviors of multi-column low CG FOWT system under normal operation and parked conditions are *** influence of second-order wave force on the motion responses of the multi-column platform,fore-aft force and moment of the tower base and mooring force are researched *** results demonstrate that the coupled dynamic responses at rated operating condition and extreme condition meet the normal operating requirements and extreme survival requirements of FOWT system in the shallow water(50m)of South China *** addition,it is found that,the wave frequency response gradually replaces the second-order low frequency response as the main influencing factor of the coupled dynamic response of the FOWT system with the increasing severity of the sea ***,in general,the magnitude of second-order low frequency response increases with the increasing severity of the design load ***,in the subsequent design of the shallow water FOWT system,the second-order effects should be paid enough attention.

关键词： Floating offshore wind turbine Multi-column platform Second-order wave force concept design Coupled dynamic response