This applet can imitate a N freedom
vibration model. You can used it to see the relations between model
parmeters and the modal parmeters. And you can used to imitate the vibration
outputs on a certain excite force.

Operation
Steps 1. Input
the freedom of model: N 2. Input
the model parmeters: Mi, Ci, Ki, i=1,2,....,N 3. Press
"Get" to compute the modal parmeters 4. Select
a excite point, 5. Select
type of excite force, 6. Show
the output in a certain point, 7. Show
the transfer function in a certain point.