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| 1 | CASE-BASED PRODUCT CONFIGURATION AND REUSE IN MASS CUSTOMIZATION显示文摘The increasing complexity and size of configuration knowledge bases requires the provision of advanced methods supporting the development of the actual configuration process and design reuse.A new framework to find a feasible and practical product configuration method is presented in mass customization.The basic idea of the approach is to integrate case-based reasoning (CBR) with a constraint satisfaction problem(CSP).The similarity measure between a crisp and range is also given,which is common in case retrieves.Based on the configuration model,a product platform and customer needs,case adaptation is carried out with the repair-based algorithm.Lastly,the methodology in the elevator configuration design domain is tested. | Wang Shiwei Tan Jianrong Zhang Shuyou Wang Xin He Chenqi State Key Laboratory of CAD&CG,Zhejiang University,Hangzhou 310027, China | 2004 | Chinese Journal of Mechanical Engineering2004，17，2： | 39 |
| 2 | Geometric construction of energy-minimizing Bézier curves显示文摘Modeling energy-minimizing curves have many applications and are a basic problem of Geometric Modeling.In this paper,we propose the method for geometric design of energy-minimizing B′ezier curves.Firstly,the necessary and sufficient condition on the control points for B′ezier curves to have minimal internal energy is derived.Based on this condition,we propose the geometric constructions of three kinds of B′ezier curves with minimal internal energy including stretch energy,strain energy and jerk energy.Given some control points,the other control points can be determined as the linear combination of the given control points.We compare the three kinds of energy-minimizing B′ezier curves via curvature combs and curvature plots,and present the collinear properties of quartic energy-minimizing B′ezier curves.We also compare the proposed method with previous methods on efficiency and accuracy.Finally,several applications of the curve generation technique,such as curve interpolation with geometric constraints and modeling of circle-like curves are discussed. | XU Gang 1,4,5,WANG GuoZhao 2 & CHEN WenYu 2,3 1 Institute of Graphics and Image,Hangzhou Dianzi University,Hangzhou 310018,China 2 Department of Mathematics,Zhejiang University,Hangzhou 310027,China 3 School of Computer Engineering,Nanyang Technological University,639798,Singapore 4 Galaad,INRIA Sophia-Antipolis,2004 Route des Lucioles,06902,France 5 State Key Lab of CAD & CG,Zhejiang University,Hangzhou 310027,China | 2011 | Science China(Information Sciences)2011，54，7： | 15 |
| 3 | RESEARCH ON THE EVALUATION METHOD OF FRICTION AND LUBRICATION IN DEEP DRAWING显示文摘The deformation characteristic of bland in deep drawing is discussed. It is pointed out that the friction and lubrication conditions in for drawing are different from that in mechanical motion or machine work or other plastic process. The common test methods in laboratories are analyzed. It shows that though all those test methods can test the friction coefficient, the probe test method is most suitable for the research of friction and lubrication and the process in deep drawing, for this method is identical with the actual work condition either from the test principle or deformation status of the blank. Last the successful application in the deep drawing simulator newly developed the the probe method are intro- duced in detail. | D. N. He, X. F. Yin, H. Z. Thao, D. L*, X. Y. Ruan, J. L. Cheng and J. Y. Jiang 1) Shanghai Jiao Tong University, National Die & Mold CAD E. R. C, Shanghai 200030, China 2) Shanghai Vopkswagen Automotive Company Ltd., Shanghai 201805, China Manuscript re | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 13 |
| 4 | THE LIMITING CASE OF THIELE'S INTERPOLATING CONTINUED FRACTION EXPANSION显示文摘By means of the determinantal formulae for inverse and reciprocal differences with coincident data points, the limiting case of Thiele’s interpolating continued fraction expansion is studied in this paper and given numerical example shows that the limiting Thiele’s continued fraction expansion can be determined once for all instead of carrying out computations for each step to obtain each convergent as done in [3]. | Jie-qing Tan (Institute of Applied Mathematics, College of Science and CAD/CG Division College of Computer & Information Hefei, University of Technology, Hefei 230009, China) | 2001 | Journal of Computational Mathematics2001，19，4： | 12 |
| 5 | A LOOP DRAWBEAD RESTRAINING FORCE MODEL IN SHEET METAL DEEP DRAWING PROCESS显示文摘In sheet metal forming, drawbeads are often used to control uneven material flow which may cause defects such as wrinkles, fracture, surface distortion and springback. Appropriate setting and adjusting the drawbead force is one of the most important pa- rameters in sheet metal forming process control. This paper derives the model of loop drawbead restraining force (DBRF) using plastic forming theory, and gives the min imum blankholding force. Experiments are carried out to verify the proposed DBRF model. The good agreement between the calculated values and experiments data justi- fies the proposed loop drawbead restraining force model. | Y.J. Luo, S.P. Li, J.F. Zheng, D.N. He, Y.Q. Zhang, J.L. Cheng and J. Y. Jiang 1)National Mold & Die CAD Engineering Research Center, Shanghai 200030, China 2)Shanghai Volkswagen Automotive Company Ltd.(SVM), Shanghai 201805, China | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，5： | 11 |
| 6 | 传统型脱粒装置的数学模型及应用显示文摘在基本假设条件下,本文导出了传统的纹杆滚筒式脱粒装置的脱粒分离概率模型。它比已有模型更具有广泛性和实用性。通过与实验结果及多元二次回归模型的对比,表明该模型能较好地反映脱粒装置脱粒分离过程的定量规律。作为模型的应用,文中对脱粒装置的脱粒分离性能进行了数学模拟,并指出了它在脱粒装置优化设计上的应用。 | 万金保 赵学笃 纪春千 中国农业机械化科学研究院收获所CAD课题组 | 1990 | 农业机械学报1990，21，2： | 8 |
| 7 | INTEGRATED APPROACH TO ASSEMBLY SEQUENCE PLANNING OF C0MPLEX PRODUCTS显示文摘Assembly sequence planning will be more difficult due to the in-creasing complexity of products.An integrated approach to assembly sequence planning of complex products applying de-composition-planning-combination strategy is presented.First,an assembly is decomposed into a hierarchical structure using an assembly structure representation based on connectors.Then,an assembly planning system is used to generate the sequences that are locally optimal for each leaf partition in the structure hierarchy.By combining the local sequences systematically in a bottom-up manner and choosing suitable ones from the merged sequences,the assembly sequence of each parent structure including the whole assembly is generated.An integrated system has been completed.A complex product is given to illustrate the feasibility and the practicality of the approach. | Wang Junfeng Liu Jihong Zhong Yifang CAD Center,Huazhong University of Science and Technology,Wuhan 430074, China | 2004 | Chinese Journal of Mechanical Engineering2004，17，2： | 8 |
| 8 | 高层结构空间有限元分析新模型—SATWE显示文摘在高层结构分析中,对剪力墙和楼板的模型化假定是其关键问题,它直接决定了高层结构分析模型的科学性,同时也决定了分析软件的精度和可信度.本文在四节点等参壳元的基础上,应用静力凝聚方法,构造了允许带有任意方洞口的通用墙元,提出了以墙元为核心的高层结构分析模型,并据此模型研制了复杂体型高层结构空间有限元分析软件SATWE.SATWE分析精度高,求解速度快,前、后处理功能强,便于在工程中推广应用. | Dept. of CAD Engineering China Academy of Building Research | 1996 | 土木工程学报1996，29，3： | 7 |
| 9 | EXPERIMENTS AND SIMULATIONS OF A NEW DEVELOPED FORMING TECHNOLOGY-SHEAR-EXTRUSION PROCESS OF COMPONENTS WITH BRANCHES显示文摘Shear-extrusion process and its forming parumeters are proposed, whilst its laborsav- ing characteristic is utilized to forge large-size shutoff valve body on middle-due press. This new process is intended for the manufacture of large-size forged tubular components with branches on middle-due press. Experiments are carried out and processing parameters are obtained regarding the shear-extrusion process of a large-size shutoff valve body. Daformation and metal flow in the shear-extrusion process are inves- tigated. In orber to verify the laborsaving characteristic of this new process some contrastive experiments of extrusion force are performed between shear-extrusion and upsetting-extrusion for forming tubular components with branches. Based on rigid plastic FEM a plane-stain model is established to analyze shear-extrusion process of tubular components with branches. The analysis results by 2-dimensions PEM are comparatively quite well consistent with those of experiments. Both simulated and experimental results show that this new forming process is feasible for forging large-size tubular components with branches on middle-due press. | H.L. Yang, D.C. Kang, Z.L. Zhang, X.H. Piao and Z.D. Shi (National Die and Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China) (School of Materials Sci. & Eng., Harbin Institute of Technology, Harbin 150001, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，3： | 6 |
| 10 | OPTIMIZATION OF AUTOBODY PANEL STAMPING PROCESS BASED ON DYNAMIC EXPLICIT FINITE ELEMENT METHOD显示文摘Taking CPU time cost and analysis accuracy into account, dynamic explicit finite ele- ment method is adopted to optimize the forming process of autobody panels that often have large sizes and complex geometry. In this paper, for the sake of illustrating in detail how dynamic explicit finite element method is applied to the numerical simulation of the autobody panel forming process,an example of optimization of stamping process pain meters of an inner door panel is presented. Using dynamic explicit finite element code Ls-DYNA3D, the inner door panel has been optimized by adapting pa- rameters such as the initial blank geometry and position, blank-holder forces and the location of drawbeads, and satisfied results are obtained. | X. G. Bao D. N. He D. Lu C. X. Li J. L. Cheng and J. Y. Jiang( 1) National Mold and Dies CAD Engineering Research Center, Shanghai 200030, China 2) Shanghai Volkswagen Automotive Company Ltd.(SVW), Shanghai 201805, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 6 |
| 11 | 微型三维CAD软件评测报告显示文摘随着我国制造业跨过新千年的门槛,微机三维CAD软件在国内企业中的应用蓬勃兴起。面对各具特色的CAD软件产品,用户如何选择,厂商如何准确定位,已成为迫切希望解决的问题。本刊组织熟练掌握CAD软件并具有相当理论水平和实践经验的专家,于2000年7月对国内外最新发布的微机三维CAD软件进行评测。本次评测主要涉及软件的易操作性、实用性、稳定性和特色功能等方面的内容,同时结合评测向读者推荐先进实用、性能优良、价格适宜的微机三维CAD软件。 | 评测专家组 | 2000 | 计算机辅助设计与制造2000，，8： | 5 |
| 12 | RESEARCH OF GUIDANCE TECHNOLOGY FOR ASSEMBLY MODELING IN VIRTUAL ENVIRONMENT显示文摘Technology of movement and knowledge guidance in virtual assembly is presented The designer can move the mechanical part precisely under the movement guidance The movement guidance is implemented based on constraint recognition and assembly degree of freedom analysis A multi hierarchy knowledge base is built to represent the assembly knowledge and information The virtual assembly system judges the requirement of the designer based on the context of design task and searches for the useful knowledge and information, which can be provided to the designer in a natural | Zhang Shuyou Liu Zhenyu Tan Jianrong State Key Laboratory of CAD&CG,Zhejiang University | 2001 | Chinese Journal of Mechanical Engineering2001，14，2： | 5 |
| 13 | RESEARCH ON NURBS SKINNING SURFACE VIA COMPLEX CURVES显示文摘RESEARCHONNURBSSKINNINGSURFACEVIACOMPLEXCURVES￥ZhangLenian;ZhouLaisui;ZhouRurong(ResearchcenterofCAD/CAMEngineering,NanjingUn... | Zhang Lenian Zhou Laisui Zhou Rurong (Research center of CAD / CAM Engineering,Nanjing University of Aeronautics and Astronautics, Nanjing, China, 210016) | 1996 | Chinese Journal of Aeronautics1996，9，2： | 4 |
| 14 | Electro-mechanical response of functionally graded beams with imperfectly integrated surface piezoelectric layers显示文摘The time-dependent behavior of a simply-supported functionally graded beam bonded with piezoelectric sensors and actuators is studied using the state-space method. The creep behavior of bonding adhesives between piezoelectric layers and beam is characterized by a Kelvin-Voigt viscoelastic model, which is practical in a high temperature circumstance. Both the host elastic functionally graded beam and the piezoelectric layers are orthotropic and in a state of plane stress, with the former being inhomogeneous along the thickness direction. A laminate model is employed to approximate the host beam. Moreover, the coupling effect between the elastic deformation and electric field in piezoelectric layers is considered. Results indicate that the viscoelastic property of interfacial adhesives has a significant effect on the function of bonded actuators and sensors with time elapsing. | YAN Wei1 & CHEN Weiqiu1,2 1. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China 2. State Key Lab of CAD & CG, Zhejiang University, Hangzhou 310027, China | 2006 | Science China(Physics,Mechanics & Astronomy)2006，49，5： | 4 |
| 15 | Semi-stationary subdivision operators in geometric modeling显示文摘Based on the view of operator, a novel uniform subdivision construction method is proposed for free form curve and surface design. This method can give an appropriate manner of parameter change in the subdivision iteration with fewer parameters and better shape control, such as building local revolving surfaces. The convergent property of order 2 subdivision surface is elegantly analyzed using computing techniques of matrix. This method is promised to be valuable in Computer Aided Design and computer graphics, due to the simplicity both in mathematical theory and practical implementation, the similarity to the B-spline curve and surface, G1 continuity, the affine invariability and local flexible control. | ZHANG Hongxin and WANG Guojin(State Key Laboratory of CAD & CG, Institute of Computer Images and Graphics, Zhejiang University, Hangzhou 310027, China) | 2002 | Progress in Natural Science:Materials International2002，12，10： | 4 |
| 16 | PREDICTION OF ACOUSTIC PERFORMANCE IN EXPANSION CHAMBER MUFFLERS WITH MEAN FLOW BY FINITE ELEMENT METHOD显示文摘The equation of wave propagation in a circular chamber with mean flow is obtained. Computational solution based on finite element method is employed to determine the transmission loss of expansive chamber. The effect of the mean flow and geometry (length of expansion chamber and expansion ratio)on acoustic attenuation performance is discussed, the predicted values of transmission loss of expansion chamber without and with mean flow are compared with those reported in the literature and they agree well. The accuracy of the prediction of transmission loss implies that finite element approximations are applicable to a lot of practical applications. | Liu YadongLi CongxinRuan XueyuNational Die & Mold CAD EngineeringResearch Center,Shanghai Jiaotong University,Shanghai 200030, China | 2003 | Chinese Journal of Mechanical Engineering2003，16，3： | 4 |
| 17 | RESEARCH ON THE CONSTRAINT MAPPING FROM FUNCTION TO ASSEMBLY显示文摘Assembly sketch is not only the visualization of abstract function, but also the template of detail design. Two kinds of information are needed to create assembly sketch: structure and assembly constraint. Most researches are aimed at how to obtain structures from function, but the problem of how to obtain assembly constraint from function is ignored. Following the definition of assembly unit and the classification of function, a hierarchical mapping method from function to assembly constraint is put forward, and the mapping method includes two steps. The first step is the mapping from function to assembly semantics which is assembly expression and accordant with engineer's design habit. The second one is the mapping from assembly semantics to basic assembly constraints that are convenient for computer to handle. The mapping method is applied to DDMS (design, drafting and management system) successfully. | Tan JianrongJi YangjianLiu ZhenyuChen HongliangYue XiaoliState Key Laboratory of CAD&CG,Zhejiang University,Hangzhou 310027, China | 2003 | Chinese Journal of Mechanical Engineering2003，16，3： | 3 |
| 18 | 我国工程设计CAD发展现状调查及“甩图板”对策研究显示文摘 | 张凯 <工程设计CAD发展现状调查及'甩图板'对策研究>课题组 | 1997 | 工程设计CAD及自动化1997，，2： | 3 |
| 19 | Curve interpolation based on Catmull-Clark subdivision scheme显示文摘An efficient algorithm for curve interpolation is proposed. The algorithm can produce a subdivision surface that can interpolate the predefined cubic B-spline curves by applying the Catmull-Clark scheme to a polygonal mesh containing 'symmetric zonal meshes', which possesses some special properties. Many kinds of curve interpolation problems can be dealt with by this algorithm, such as interpolating single open curve or closed curve, a mesh of nonintersecting or intersecting curve. The interpolating surface is C2 everywhere excepting at a finite number of points. At the same time, sharp creases can also be modeled on the limit subdivision surface by duplicating the vertices of the tagged edges of initial mesh, i.e. the surface is only C0 along the cubic B-spline curve that is defined by the tagged edges. Because of being simple and easy to implement, this method can be used for product shape design and graphic software development. | ZHANG Jingqiao and WANG Guojin(State Key Laboratory of CAD&CG, Institute of Computer Images and Graphics, Zhejiang University, Hangzhou 310027, China) | 2003 | Progress in Natural Science:Materials International2003，13，2： | 3 |
| 20 | DEFICIENT INFORMATION MODELING OF MECHANICAL PRODUCTS FOR CONCEPTUAL SHAPE DESIGN显示文摘In allusion to the deficient feature of product information in conceptual design, a framework of deficient information modeling for conceptual shape design is put forward, which includes qualitative shape modeling (a qualitative solid model), uncertain shape modeling (an uncertain relation model) and imprecise shape modeling (an imprecise region model). In the framework, the qualitative solid model is the core, which represents qualitatively (using symbols) the conceptual shapes of mechanical products. The uncertain relation model regarding domain relations as objects and the imprecise region model regarding domains as objects are used to deal with the uncertain and imprecise issues respectively, which arise from qualitative shape modeling or exist in product information itself. | Liu Jihong Shu Huilin CAD Center,Huazhong University of Science and Technology,Wuhan 430074,China | 2002 | Chinese Journal of Mechanical Engineering2002，15，1： | 3 |
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