*PolyBeam()
Creates a polybeam.
Syntax
*PolyBeam(beam_name,"beam_label",pt_1,pt_2,,pt_n)
Arguments
- beam_name
- The variable name of the polybeam.
- beam_label
- The descriptive label of the polybeam.
- pt_1, pt_2, ..., pt_n
- The points that describe the polybeam
Example
*Point(pt_1, "Point 1")
*Point(pt_2, "Point 2")
*Point(pt_3, "Point 3")
*Point(pt_4, "Point 4")
*PolyBeam(pb_stabar, "Stab bar", pt_1, pt_2, pt_3, pt_4)
Context
Properties
Property | Returns Data Type | Description |
---|---|---|
beam@pt_1 | Beam | The beam on the polybeam originating at pt_1. |
body@pt_1 | Body | The dummy body on the beam at pt_1. |
label | string | The descriptive label of the polybeam. |
state | boolean | Control state (TRUE or FALSE). |
varname | string | The variable name of the polybeam. |
Rho | real | The density of the polybeam. |
E | real | The Young's modulus of elasticity. |
G | real | The shear modulus of elasticity. |
OD | real | The outer diameter of the polybeam cross section. |
ID | real | The inner diameter of the polybeam cross section. |
AS | real | The correction factor for the shear deflection. |
CRATIO | This argument indicates the structural damping matrix is a ratio of the stiffness matrix. |
Comments
A polybeam is modeled as a number of beam segments connecting intermediate bodies created internally by MotionView. The mass and inertia properties of the polybeam are modeled as lumped mass and inertias of intermediate bodies.
The intermediate bodies created for a polybeam can be accessed by specifying one of the point locations used to define the polybeam. For example, the body located at pt_3 in pb_stabar can be accessed as pb_stabar.body@pt_3. Similarly the beam segments of a polybeam may be accessed by specifying the point from where it originates. For example, the beam between pt_2 and pt_3 can be accessed as pb_stabar.beam@pt_2.