Bases: seapy.subsystems.subsystemstructural.SubsystemStructural
Subsystem for longitudinal waves in a 2D isotropic component.
Constructor.
| Parameters: |
|
|---|
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 a 2D isotropic plate. |
| classname | Name of class of the object. |
| component | |
| conductance | Conductance . |
| 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 in subsystem. |
| frequency | Frequency. |
| impedance | 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 , the real part of the impedance . |
| resistance_point_average | Average point resistance. |
| soundspeed_group | Group velocity for longitudinal waves in a 2D isotopic plate. |
| soundspeed_phase | Phase velocity for longitudinal waves in a 2D isotropic plate. |
| tlf | Total loss factor. |
| velocity | Vibrational velocity . |
| velocity_level | Velocity level . |
| wavenumber | Wavenumber for longitudinal waves in a plate. |
Average frequency spacing for a 2D isotropic plate.
| Return type: | numpy.ndarray |
|---|

with:



See Lyon, equation 8.2.8
Impedance
| Return type: | numpy.ndarray |
|---|
Group velocity for longitudinal waves in a 2D isotopic plate.
| Return type: | numpy.ndarray |
|---|

with:



See Lyon, above eq 8.2.5
See Craik, table 3.2, third row, page 49.
Often the density is replaced as a surface density (mass per unit area) and the thickness or height of the plate.
Phase velocity for longitudinal waves in a 2D isotropic plate.
| Return type: | numpy.ndarray |
|---|

See Lyon, above eq 8.2.8
Wavenumber for longitudinal waves in a plate.
| Return type: | numpy.ndarray |
|---|
![k_L = \sqrt{\left[ \left( m - \delta_1 \right) \frac{\pi}{L_1} \right] + \left[ \left( n - \delta_2 \right) \frac{\pi}{L_2} \right]}](../../_images/math/405e2af5fd4025aadc1b9f537b020e476879f3d3.png)
See Lyon, equation 8.2.1.