A rigid body cannot be deformed and motion of that body is represented with six degrees of freedom. The body can be classified as one of several types in terms of geometry, as follows.
Figure 3.1: List of rigid bodies
Type | Description |
Solid Body (Rigid Body) | Use to define a rigid body with six degrees of freedom. This can be created by importing CAD or creating a simple geometry such as a ball, cylinder or box. If the geometry has a closed volume, it is defined as the solid body of which the mass, mass moment of inertia and mass center can be calculated by entering the density. When the solid body has a single volume, it can be translated to an EasyFlex body. When the solid body has multiple volumes, however, it cannot be used as an EasyFlex body. In this case, an | (see below) is useful to translate it into an EasyFlex body.
Assembled Body (Rigid Body) | Use to define a rigid body with six degrees of freedom. This can be created by importing the part file which is generated in the Motion Preprocessor. When the assembled body has a closed volume, its mass, mass moment of inertia and mass center can be calculated by entering the density. This body can be used as an EasyFlex body. |
Sheet body | This body is internally classified as either a | or an . This is not actually a feature of the Motion Preprocessor but terminology which is used to explain the functionality of a body in this manual. This body is created when an imported geometry has no volume, such as a point, curve, surface or a separated solid due to a CAD fault or the tight tolerance of the CAD translator when importing or exporting. This body is treated internally as a sheet body of which mass, mass of moment of inertia and mass center cannot be calculated. Those body properties must therefore be entered directly. This body cannot be used as an EasyFlex body.