seapy.components.plate.SubsystemShear

class seapy.components.plate.SubsystemShear(name, system, **properties)[source]

Bases: seapy.subsystems.subsystemstructural.SubsystemStructural

Subsystem for shear waves in a 2D isotopic component.

__init__(name, system, **properties)

Constructor.

Parameters:
  • name (string) – Identifier
  • component (SeaPy.components.Component) – Component

Methods

__init__(name, system, **properties) Constructor.
addExcitation(name, model, **properties) Add excitation to subsystem.
disable([couplings]) Disable this subsystem.
enable([couplings]) Enable this subsystem.
info([attributes]) Return dataframe.
plot(quantity[, yscale]) Plot quantity.

Attributes

SORT str(object=’‘) -> str
average_frequency_spacing Average frequency spacing for shear waves in a 2D isotropic plate.
classname Name of class of the object.
component
conductance Conductance G.
conductance_point_average Average point conductance of a structural component.
damping_term The damping term is the ratio of the modal half-power bandwidth to the average modal frequency spacing.
dlf Damping loss factor of subsystem.
enabled Switch indicating whether the object is enabled.
energy Total energy E in subsystem.
frequency Frequency.
impedance
included Indicates whether the object is included in the analysis.
linked_couplings_from
linked_couplings_to
linked_excitations
mobility Mobility Y
modal_density Modal density.
modal_energy Class capable of containing spectral values.
modal_overlap_factor Modal overlap factor.
name
power_input Total input power due to excitations.
resistance Resistance R, the real part of the impedance Z.
resistance_point_average Average point resistance.
soundspeed_group Group velocity for shear wavees in a 2D isotropic plate.
soundspeed_phase Phase velocity for shear waves in a 2D isotropic plate.
tlf Total loss factor.
velocity Vibrational velocity v.
velocity_level Velocity level L_v.
wavenumber Wavenumber of shear waves.
average_frequency_spacing[source]

Average frequency spacing for shear waves in a 2D isotropic plate.

\overline{\delta f}_S^{2D} = \frac{c_S^2}{\omega A}

with:

  • soundspeed of shear waves c_S
  • angular frequency \omega
  • area of the plate A

See Lyon, eq 8.2.5

soundspeed_group[source]

Group velocity for shear wavees in a 2D isotropic plate.

c_{group} = c_{phase} = 2 C_S

See Lyon, above eq. 8.2.5

soundspeed_phase[source]

Phase velocity for shear waves in a 2D isotropic plate.

c_S = \sqrt{\frac{G}{\rho}}

with:

  • shear modulus G
  • density of the plate \rho

See Lyon, above eq. 8.2.5

wavenumber[source]

Wavenumber of shear waves.

k_S = \frac{2 \rho \omega \left( 1 + \nu  \right) }{E h}

with:

  • density \rho
  • angular frequency \omega
  • Poisson’s ratio \nu
  • Young’s modulus E
  • plate thickness h

Langley and Heron, 1990, eq 25

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