8

372 Chapter 5: Creating Geometry
PFlow Events group
When the Mesher object is applied to a Particle
Flow system, use these controls to create meshes
for specific events in the system. Mesher does not
create meshes for the remaining events.
[list box]—Displays a ll Particle Flow events
currently affected by Mesher.
Add—Lets you specify Particle Flow events to be
affected by Mesher.
If the Mesher object is applied to a Particle Flow
system, when you click Add, an Add PF Events
dialog opens listing all events in the system.
Highlight the events to add, and then click OK.
Theeventsnowappearinthelist.
Remove—Deletes hig h lig hted events from the list.
Cr eati ng D y nami cs Obj ect s
Dynamics Objects
Create panel > Geometry > Dynamics Objec ts
Create menu > D ynamics
Dynamics objects are similar to other mesh
objects,exceptthattheycanbemadetoreactto
the motion of objects to w h ich t hey are bound, or
they can provide dynamic forces when included in
a
dynamics simulat ion (page 2–663)
.
The following topics describe the t ypes of
dynamics objects and how to create and use them:
Spring Dynamics Object (page 1–376)
Damper Dy namics Object (page 1–372)
Da mper D y na mics Obj ect
Create panel > G eometr y > D ynamics Objects > O bject
Type rollout > Damper button
Create menu > Dynamics > Damper
The Damper object provides a dynamic object
that can behave as either a shock-absorber or an
actuator. It consists of a base, a main housing,
and a piston, with an optional boot. The piston
slides within the main housing, providing different
heights. The overall height can be affected by
binding objects, in the same way as the Spring
dynamic object.
Note: Damper is similar to Spring in many respects.
See
Spring object (page 1–376)
for more detailed
descriptions of similar parameters and procedures.
Procedures
To create a damper:
1.
Drag and release to specify the diameter.
2. Move the mouse and click to specify the over all
height of the damper.
To use a damper in a dy namics simulation:
The following must be in place to use the damper
forces in a dynamics simulation:
1. Bind two objects to the ends of the damper, and
choose Bound to Object Pivots in the End Point
Method group box at the top of the command
panel.
2. In the dynamics simulation, add the damper
to the Object List. (The damper itself is not
adjusted in the dynamics simulation, so all of
the dynamics parameters will be disabled for
the d amper object.)
3. Includeatleastoneoftheboundobjects
or
aparent
of one of the bound objects in the
simulation. For example, you can bind two
dummy objects to the ends of a damper, and