pyva.systems.acousticRadiators.CircularPiston

class pyva.systems.acousticRadiators.CircularPiston(radius, fluid=Fluid(c0=343.0, rho0=1.23, eta=0.01))

Bases: object

The CircularPiston class defines the dynamics and acoustics of a piston in a rigid wall radiating into a semi-infinite fluid

radius

Radius of piston

Type:

float

fluid

fluid of half space

Type:

fluid

__init__(radius, fluid=Fluid(c0=343.0, rho0=1.23, eta=0.01))

Class contructor for CircularPiston

Parameters:

• radius (float) – radius of the piston

• fluid (fluid) – fluid in half space

Methods

__init__(radius[, fluid])	Class contructor for CircularPiston
acousticImpedance(omega)	Radiation impedance of circular piston Za = p/v
acoustic_FE(omega[, ID])	Acoustic Point Element of piston radiators
mechanicalImpedance(omega)	Mechanical impedance of cisular piston Z = F/v
pressure(omega, dist[, theta])	Field pressure of cisular piston
radiationImpedance(omega)	Radiation impedance of circular piston Za = p/Q

Attributes

area	Area of Piston

acousticImpedance(omega)

Radiation impedance of circular piston Za = p/v

The pressure is averaged over the piston surface

Parameters:

omega (float) – angular frequency

Return type:

acoustic radiation impedance of piston

acoustic_FE(omega, ID=[1], **kwargs)

Acoustic Point Element of piston radiators

A p = q with A = 1/Zrad

Uses the priston radiation function to simulate a circular open end in a baffle

Parameters:

omega (float) – angular frequency

Returns:

[1 x 1 x Nfreq]

Return type:

Dynamic matrix

property area

Area of Piston

Return type:

Surface area of piston

mechanicalImpedance(omega)

Mechanical impedance of cisular piston Z = F/v

The pressure is average over the piston surface

Parameters:

omega (float) – angular frequency

Return type:

mechanical impedance of radiating piston

pressure(omega, dist, theta=0)

Field pressure of cisular piston

Parameters:

• omega (float) – angular frequency

• dist (float) – distance to piston center

• theta (float) – angle to piston normal

Return type:

field pressure of acoustic field in fluid

radiationImpedance(omega)

Radiation impedance of circular piston Za = p/Q

The pressure is averaged over the piston surface

Parameters:

omega (float) – angular frequency

Return type:

volume radiation impedance of piston