pyva.systems.infiniteLayers.FluidLayerHoneyComb

class pyva.systems.infiniteLayers.FluidLayerHoneyComb(thickness, fluid=<class 'pyva.properties.materialClasses.Fluid'>)

Bases: FluidLayer

The FluidLayer class deals with the infinite honeycomb core layers in the absorber context

Implementation is equal to fluid layer, except that the wavenumber in in-plane direction is alway zero.

thickness

thickness of the layer

Type:: float

fluid

Fluid of the layer. The default is mc.Fluid.

Type:: fluid, optional

ID

[left ID, right ID] of fluid layer

Type:: list of int

__init__(thickness, fluid=<class 'pyva.properties.materialClasses.Fluid'>)

Class contructor for acoustic tube

Parameters:

thickness (float) – thickness of the layer
fluid (fluid, optional) – Fluid of the layer. The default is mc.Fluid.
ID (list of int) – [left ID, right ID] of fluid layer

Return type:

None.

Methods

`__init__`(thickness[, fluid])	Class contructor for acoustic tube
`get_xdata`(omega, kx)	Determine the appropriate xdata from omega and kx.
`transfer_impedance`(omega[, kx, ID])	Transferimpedance of honey comb layers

Attributes

isequivalentfluid

Determine if layer is of type equivalent fluid

static get_xdata(omega, kx)

Determine the appropriate xdata from omega and kx.

Infinite Layer theory often involves integration over wavenumber. Thus, the kx is the integration variable.

If omega is scalar xdata will be wavenumber in x (kx) if kx is scalar xdata will be angular frequency if kx and omega have same dimension it is assumed that kx belongs to a constant angle and is given by kx = omega/c0*sin(theta) and xdata will be angular frequency

Parameters:

omega (float or ndarray) – angular frequency
kx (float or ndarray) – wavenumber

Returns:

wavenumber or omega as DataAxis object

Return type:

DataAxis

property isequivalentfluid

Determine if layer is of type equivalent fluid

Defauls parameter is True

Returns:: True.
Return type:: bool

transfer_impedance(omega, kx=0, ID=[1, 2])

Transferimpedance of honey comb layers

Takes simple 1D transmission line model based on AcousticTube properties. kx Parameter is ignored in the transfermatrix but used in the xdata generation

Parameters:

omega (float or ndarray) – scalar angular frequency
kx (float or ndarray, optional) – In-plane wavenumber. The default is 0.
ID (list of int, optional) – Left and right when overwritten, None takes object ID. The default is None.

Returns:

[2 x 2] array of transferimpedance

Return type:

DynamicMatrix