Circular Plate - Free
Description
A circular plate unattached at its edges.
(make-object 'free-circ-plate ... )
Syntax and Default Values
A 'free-circ-plate can be created using the following Lisp syntax (the default values are shown for each of the physical parameters):
(make-object 'free-circ-plate
(modes 80)
(radius .5)
(thickness .01)
(density 7800)
(young 2e11)
(poisson .3)
(freq-loss 1)
(const-loss 1))
Parameters
The arguments for the physical parameters can be either numerical values or Modalys controllers (either dynamic or constant). If a given parameter is not supplied when using the Lisp syntax, the default parameter value will be used.
- modes: number of modes.
- radius: in meters.
- thickness: in meters.
- density: in kg/m3. See chart of material properties for appropriate values.
- young: Young's modulus, in N/m2. See chart of material properties for appropriate values.
- poisson: poisson ratio. See chart of material properties for appropriate values.
- freq-loss, const-loss: loss coefficients. See General object information.
Accesses
A 'free-circ-plate can be accessed in one dimension - perpendicular to the plate (i.e. 'normal):
(make-access my-plate my-2D-controller 'normal)
(make-access1 my-plate (const 0.25 0) 'normal)
(make-access2 my-plate (const 0.75 90) 'normal)
Options
Tuning
A 'free-circ-plate can be tuned to a specific pitch, using the (set-pitch ...) function, by adjusting one of the following physical parameters:
- 'radius
- 'thickness
- 'density
- 'young
For example:
(setq my-plate (make-object 'free-circ-plate))
(set-pitch my-plate 'radius (const 440))
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