Solid Modelling

Computer Aided Solid Modelling

Computer Aided Solid Modelling

Introduction

Solid modelling is three-dimensional modelling) research part of the unification of three-dimensional object, that is, three-dimensional objects suitable for computer processing of the model. Also known as body shape (volume modelling). Other modelling methods include surface modelling (widely used in the animation) and wire-frame model (represented by three-dimensional ambiguous). The main use of solid modelling is computer-aided design, engineering analysis, computer graphics and animation, rapid prototyping (rapid prototyping), medical testing, and scientific visualisation.

Discussion

Sweeping

Along a path to "sweep out" an element called a three-dimensional characteristic of the surface characteristics. These volumes are either applied to the object (the "stretch (Extrusion)") or removal of material ("cutting path (Cutter path)"). Also it is called 'sketch-based modelling (sketcher based modelling)'. And various manufacturing technologies, such as extrusion (extrusion), milling (milling), turning (lathe) and so on.

Boundary representation

A three-dimensional expression with its boundary surface, then fill to become the entity. Also became 'surface modelling surfacing,' And various manufacturing techniques similar; injection moulding (Injection Moulding), casting (casting), forging (forging), thermoplastic processing (thermoforming), and so on.

Parametric voxel

Singled out from a parametric voxel library and specify the parameters of an object. For example, the bolts in the library a model and modify its parameters set in this model can be used for all bolts size.

Space occupied (Spatial occupancy, or space enumeration)

The entire spatial sub-divided into rule blocks (cell, or cells, cell cavity) , the object represented by specifying it occupies those blocks. Said this object can be used in the finite-difference analysis. This is usually made in the model is complete, as a part of the pre-treatment of the analysis software.

Decomposition

"Similar, but the block can be irregular, they do not" pre-woven "and" space occupied. Said this model can be used for finite element analysis. This is usually made in the model is complete, as a part of the pre-treatment of the analysis software.

Constructive Solid Geometry

And used as, poor pay such Boolean operations to combine simple objects, usually a tree hierarchical structure (combination can be combined).

Feature-based modelling (Feature based modelling)

A complex combination of the object and the operation can be together as a unit to modify and copy. The sequence of operation is stored in a tree structure (Boolean tree or feature tree), the parameter change can be propagated in the tree (propagate).

Parametric modelling

Characterized the properties is parameterized, and given label (variable name) is not only a fixed number size, the relationship between parameters of the whole model is also recorded, so that the parameter values ??change easier. Almost always it is used in combination and features, called feature-based parametric modelling system. Because the high-speed development of the PC and the software price competitive, solid modelling system in the past decade has become the common sense of the engineering profession lesson. They are an important tool for machine designers.

CAD software to create a simple example of the solid modelling

Solid modelling software is aimed to create a virtual reality machine design and ...