A computer aided design method for car form and its application based on shape parameters

2020 ◽  
Vol 14 (6) ◽  
Author(s):  
Fan Liu ◽  
Xiaomin Ji ◽  
Gang Hu ◽  
Jing Gao
Keyword(s):  
Computer Aided Design ◽  
Design Method ◽  
Shape Parameters ◽  
Computer Aided ◽  
Aided Design

scholarly journals Design Method of Circular Weft-Knitted Jacquard Fabric Based on Jacquard Module

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Peixiao Zheng ◽  
Gaoming Jiang ◽  
Honglian Cong
Keyword(s):  
Mathematical Modeling ◽  
Computer Aided Design ◽  
Theoretical Basis ◽  
Design Method ◽  
Two Dimensional ◽  
Design Procedures ◽  
Rapid Design ◽  
Computer Aided ◽  
Aided Design

Abstract Recently, there is an increasing interest in design of circular weft jacquard because of the pursuit of fashion and comfort. Aiming at the complexity of the computer-aided design method of the existing circular weft-knitted jacquard fabrics, which is not conducive to the rapid design and intelligible for designers, a design method was proposed to transform pattern notation into knitting diagram efficiently, which was based on knitting rules and its creation as a set of jacquard modules. Knitting characteristics of jacquard fabrics were studied as a precondition. On this basis, the design procedures of jacquard modules were analyzed and illustrated by taking tricolor bird's eye backing jacquard as an example. Jacquard modules with various jacquard effects were designed and stored in a jacquard module database. To mathematically describe pattern notation, knitting diagram, and jacquard module, two-dimensional matrixes were established by the method of mathematical modeling, and a corresponding algorithm for the transformation of the pattern to knitting information according to the knitting rules of jacquard modules, which can be applied to ordinary jacquard fabrics was summarized. The project of tricolor circular weft-knitted jacquard with bird's eye in the reverse and four-color air-layer jacquard were taken for instance to verify the models and algorithm. The results obtained show that the approach can efficiently and conveniently realize the designation and machine-knitting of weft-knitted jacquard fabric, which provide a theoretical basis and notation of modeling for the computer-aided design of circular weft-knitted jacquard fabrics.

scholarly journals Computational wrapping: A universal method to wrap 3D-curved surfaces with nonstretchable materials for conformal devices

2020 ◽  
Vol 6 (15) ◽  
pp. eaax6212 ◽  
Author(s):  
Yu-Ki Lee ◽  
Zhonghua Xi ◽  
Young-Joo Lee ◽  
Yun-Hyeong Kim ◽  
Yue Hao ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Reliable Method ◽  
Design Method ◽  
Universal Method ◽  
Curved Surfaces ◽  
Two Dimensional ◽  
Steel Sheets ◽  
Computer Aided ◽  
Conformal Structures ◽  
Aided Design

This study starts from the counterintuitive question of how we can render conventional stiff, nonstretchable, and even brittle materials sufficiently conformable to fully wrap curved surfaces, such as spheres, without failure. Here, we extend the geometrical design method of computational origami to wrapping. Our computational wrapping approach provides a robust and reliable method for fabricating conformal devices for arbitrary curved surfaces with a computationally designed nonpolyhedral developable net. This computer-aided design transforms two-dimensional (2D)–based materials, such as Si wafers and steel sheets, into various targeted conformal structures that can fully wrap desired 3D structures without fracture or severe plastic deformation. We further demonstrate that our computational wrapping approach enables a design platform that can transform conventional nonstretchable 2D-based devices, such as electroluminescent lighting and flexible batteries, into conformal 3D curved devices.

Rapid computer-aided design method for fast-acting solenoid actuators

1999 ◽  
Vol 35 (5) ◽  
pp. 991-999 ◽  
Author(s):  
M. Piron ◽  
P. Sangha ◽  
G. Reid ◽  
T.J.E. Miller ◽  
D.M. Ionel
Keyword(s):  
Computer Aided Design ◽  
Design Method ◽  
Computer Aided ◽  
Aided Design ◽  
Fast Acting

Design of Longitudinal Beam Layout on a Curved Shell Based on the Production-Oriented Design Concept

1994 ◽  
Vol 10 (04) ◽  
pp. 217-222
Author(s):  
Kohji Honda ◽  
Noriyuki Tabushi
Keyword(s):  
Crude Oil ◽  
Computer Aided Design ◽  
Design Method ◽  
Three Dimensional ◽  
Design System ◽  
Two Dimensional ◽  
Skilled Workers ◽  
System A ◽  
Computer Aided ◽  
Aided Design

A VLCC (very large crude oil carrier) has approximately 1000 curved longitudinal beams, many of which have three-dimensional complicated curvatures. Due to the shortage of highly skilled workers and the need to keep costs down, production and structural designers have worked to reduce the number of such beams. In order to meet the requirements of production, the authors' company has attempted several design approaches for the longitudinal beam layout to reduce the number of beams that have complicated curvature. Recently, through the application of a computer-aided design system, which has been improved for shipbuilding based on the Calma's system, a new design method for the longitudinal beam layout has been successfully developed. A significant number of beams with a twisted configuration have been eliminated and replaced with beams of simpler, two-dimensional shapes. This paper shows the transition of these design approaches, and the application of the new design to building a VLCC.

Computer-Aided Design of the RSSR Function Generating Spatial Mechanism Using the Selective Precision Synthesis Method

1987 ◽  
Author(s):  
S. R. Dhall ◽  
S. N. Kramer
Keyword(s):  
Computer Aided Design ◽  
Design Method ◽  
General Procedure ◽  
Mathematical Formulation ◽  
Synthesis Method ◽  
Nonlinear Constraint ◽  
Planar Function ◽  
Computer Aided ◽  
Precision Synthesis ◽  
Aided Design

Abstract Planar function generating mechanisms may be synthesized for a limited number of precision points by carrying out a kinematic inversion about the output link. However, this becomes quite difficult for spatial mechanisms. In this paper the general RSSR spatial function generating mechanism is synthesized using the Selective Precision Synthesis technique. In this computer-aided design method, nonlinear constraint equations relating the generated and desired rotations of the output crank are formulated. These constraints which define accuracy neighborhoods around each of the “n” prescribed output crank rotations, are then solved using the Generalized Reduced Gradient Method of optimization. The mathematical formulation, the general procedure of synthesis and numerical examples are presented in this paper.

Personalized femoral component design and its direct manufacturing by selective laser melting

2016 ◽  
Vol 22 (2) ◽  
pp. 330-337 ◽  
Author(s):  
Changhui Song ◽  
Yongqiang Yang ◽  
Yunda Wang ◽  
Jia-kuo Yu ◽  
Di Wang
Keyword(s):  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Femoral Component ◽  
Computer Aided Design ◽  
Design Method ◽  
Laser Melting ◽  
Content Type ◽  
Computer Aided ◽  
Biological Corrosion ◽  
Aided Design

Purpose This paper aims to achieve rapid design and manufacturing of personalized total knee femoral component. Design/methodology/approach On the basis of a patient’s bone model, a matching personalized knee femoral component was rapidly designed with the help of computer-aided design method, then manufactured directly and rapidly by selective laser melting (SLM). Considered SLM as manufacturing technology, CoCrMo-alloyed powder that meets ASTM F75 standard is made of femoral component under optimal processing parameters. The feasibility of SLM forming through conducting experimental test of mechanical properties, surface roughness, biological corrosion resistance was analyzed. Findings The result showed that the tensile strength, yield strength, hardness and biological corrosion resistance of CoCrMo-alloyed personalized femoral component fulfill knee joint prosthesis standard through post-processing. Originality/value Traditional standardized prosthesis implantation manufacturing approach was changed by computer-aided design and personalized SLM direct manufacturing, and provided a new way for personalized implanted prosthesis to response manufacturing rapidly.

scholarly journals A Computer Aided Design Method for Vaned Diffusers in Centrifugal Compressors

1984 ◽  
Author(s):  
F. S. Bhinder ◽  
M. M. H. Al-Modafar
Keyword(s):  
Computer Aided Design ◽  
Design Method ◽  
Pressure Recovery ◽  
Two Dimensional ◽  
Centrifugal Compressors ◽  
Optimum Pressure ◽  
Computer Aided ◽  
Geometrical Data ◽  
Aided Design

A procedure for designing the vaned diffusers incorporating wedge type vanes has been described. By transforming the geometrical data into the usual parameters for straight two-dimensional diffusers, the influence of some of the important variables on pressure recovery can be investigated. The results can then be used to select the values of these variables for optimum pressure recovery.

The Computer Aided Design Intelligent Design System of Threshing Parts of Combined Harvester

2012 ◽  
Vol 235 ◽  
pp. 288-293
Author(s):  
Fei Yu ◽  
Tian Yu Feng
Keyword(s):  
Expert System ◽  
Computer Aided Design ◽  
Intelligent Design ◽  
Design Method ◽  
Design System ◽  
Computer Aided ◽  
Database Technology ◽  
Aided Design ◽  
Parameterization Design

The TLCADS(The Computer Aided Design Intelligent Design System of Threshing parts of Combined Harvester)which is developed by adopting the principle of expert system, parameterization design method and database technology, can greatly improve the efficiency and quality of the design of Threshing parts of Combined Harvester with the functions of general parameterization design,systematic of components,engineering drawing and computer analysis.

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