Integration of Solid Modelling and FEM Analysis for the Design of Scroll Compressors

1999 ◽  
Author(s):  
Z. Jiang ◽  
K. Cheng ◽  
D. K. Harrison
Keyword(s):  
Fem Analysis ◽  
Constructive Solid Geometry ◽  
Solid Modelling ◽  
Design Development ◽  
Air Conditioners ◽  
Solid Geometry ◽  
Integration Approach ◽  
C Programming ◽  
Design And Manufacture ◽  
Associated Design

Abstract This paper presents an integration approach to solid modelling and finite element method (FEM) analysis on the components design of a scroll type of compressors which are becoming popular and widely used in refrigeration and air conditioners. It is time consuming to design and manufacture a scroll compressor since its two key components are complex shaped and high precision requirements. The authors use C++ programming and Pro/ENGINEER to implement the proposed approach and associated design development. Constructive solid geometry (CSG) modelling of two scroll components are created and presented. FEM analysis is used to further consolidate the modelling with respect to force and heat influences, etc. The paper concludes with a discussion on the potential of the proposed approach in mechanical product design.

A Generic Integration Approach to the Design and Manufacture of Scroll Compressors

2000 ◽  
Author(s):  
K. Cheng ◽  
Z. Jiang ◽  
D. K. Harrison
Keyword(s):  
Constructive Solid Geometry ◽  
Delivery Time ◽  
Air Conditioners ◽  
Simultaneous Design ◽  
Solid Geometry ◽  
Integration Approach ◽  
C Programming ◽  
Complex Shapes ◽  
Design Activities ◽  
Design And Manufacture

Abstract This paper presents a generic integration approach to the design and manufacture of scroll type compressors which are becoming popular and widely used in refrigeration and air conditioners. To design and manufacture scroll compressors, however, is not easy for the reasons that their key parts have complex shapes with involute curves. The authors have developed a design approach that can cope with simultaneous design activities concurrently within one single environment. The approach is implemented by using Pro/ENGINEER and Visual C++ programming. The work presented is focused on the integration of Constructive Solid Geometry (CSG) solid modelling, FEM and CAM. With this particular approach a correct and precise solid model can be achieved, which leads to an optimal design in terms of specification adherence, quality, delivery time and cost. The paper concludes with a discussion on the potential and applications of the approach for mechanical product design.

NC Machining Algorithms for CSG Solids

1987 ◽  
Author(s):  
S. T. Tan ◽  
M. F. Yuen ◽  
W. S. Sze ◽  
W. Y. Wong
Keyword(s):  
Numerical Control ◽  
Constructive Solid Geometry ◽  
Solid Modelling ◽  
Rough Machining ◽  
Command Language ◽  
Numerical Control Machining ◽  
Solid Geometry ◽  
Set Up ◽  
Automation Project ◽  
Production Automation

Abstract This paper presents two algorithms for NC (Numerical Control) machining of engineering parts defined as a CSG (Constructive Solid Geometry) (1) model. The algorithms are respectively for automatically roughing out the approximate shape using octree and quadtree encoding techniques and for machining the final shape with fine cuts. In this paper, the two algorithms are referred to as rough machining and fine machining and form the Hong Kong University’s NC module for the PADL-2 solid modelling system developed by the Production Automation Project of Rochester University. The NC module with its own command language is embedded into PADL-2. Parts defined with the PADL-2 system can be machined using this module on a 3-axis machining centre via a hardwired link. Examples of the parts machined with this set-up are also illustrated in this paper.

A polymorphic library for constructive solid geometry

1995 ◽  
Vol 5 (3) ◽  
pp. 415-442
Author(s):  
J. R. Davy ◽  
P. M. Dew
Keyword(s):  
Higher Order ◽  
Divide And Conquer ◽  
Functional Language ◽  
Constructive Solid Geometry ◽  
Solid Modelling ◽  
General Applicability ◽  
Solid Geometry ◽  
Recurrent Patterns ◽  
Higher Order Functions

AbstractSolid modelling using constructive solid geometry (CSG) includes many examples of stylised divide-and-conquer algorithms. We identify the sources of these recurrent patterns and describe a Geometric Evaluation Library (GEL) which captures them as higher-order functions. This library then becomes the basis of developing CSG applications quickly and concisely. GEL is currently implemented as a set of separately compiled modules in the pure functional language Hope+. We evaluate our work in terms of performance and general applicability. We also assess the benefits of the functional paradigm in this domain and the merits of programming with a set of higher-order functions.

On the Integration of Parametric Polynominal Surface Representations Into CSG Based Solid Modelling

1989 ◽  
Author(s):  
A. Saia ◽  
M. S. Bloor ◽  
A. de Pennington
Keyword(s):  
Shape Representation ◽  
Sculptured Surface ◽  
Constructive Solid Geometry ◽  
Solid Modelling ◽  
Surface Geometry ◽  
B Spline ◽  
Spline Surface ◽  
Solid Geometry ◽  
Modelling Techniques ◽  
Surface Representations

Abstract The integration of sculptured surface and solid modelling techniques across a common geometric domain continues as an active source of research and development in computer aided geometric design. Although much progress has been made, fundamental difficulties remain due to the differing approaches to shape representation and subsequent evaluation found in the two modelling paradigms. The first part of the paper reviews some of the issues arising when addressing the integration of existing sculptured surface representations into a Constructive Solid Geometry (CSG) based solid modeller. The second part describes work at Leeds which proposes the use of a new evaluation technique known as ISOS (Inner Set Outer Set) for CSG defined objects which incorporate both quadric and B-spline surface geometry.

Environment for Fast Elaboration of Constructive Solid Geometry

1986 ◽  
pp. 20-33 ◽  
Author(s):  
Akira Fujimoto ◽  
Christopher G. Perrott ◽  
Kansei Iwata
Keyword(s):  
Constructive Solid Geometry ◽  
Solid Geometry
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