VM-WB-MECH-054
VM-WB-MECH-054
Spinning Single Pendulum
Overview
| Reference: | Any Basic Kinematics Book |
| Solver(s): |
Ansys Mechanical |
| Analysis Type(s): | Rigid Dynamic Analysis |
| Element Type(s): | Multipoint Constraint Element |
Test Case
A uniform bar A is connected to a vertical shaft by a revolute joint. The vertical shaft is rotating around its vertical axis at a constant velocity Ω. A point mass M is attached at the tip of the bar in the figure below. The length of bar A is L. Its mass is m, its rotational inertia to its principal axis are Jx, Jy, Jz.
The angle of the bar A to the vertical axis is denoted as 
. The motion equation
has been established as follows.
The problem is solved for 
during the first second
of motion. The WB/Mechanical results are compared to a fourth order
Runge-Kutta solution.
| Material Properties | Geometric Properties | Loading | |||
|---|---|---|---|---|---|
|
L= 2.2361 m m = 551.45 kg M = 100.0 kg Jx = 229.97 kg-m2 Jy = 2.7293 kg-m2 Jz = 229.97 kg-m2 |
|
