pyHarm.Elements.NodeToNodeElements.Jenkins¶

Attributes¶

`jaxf`
`jaxf`

Classes¶

Jenkins

This element is jenkins element, modeling a friction contact using an approximate Coulomb law considering a linear spring behavior when stuck.

Functions¶

`JenkinsCorLoop_jax`(x_k, k, DFT, limit_friction_force)
`JenkinsResidual_jax`(x, om, Pdir, Pslave, Pmaster, mu, ...)
`JenkinsCorLoop`(x_k, k, dx_kdx_j, DFT, limit_friction_force)
`JenkinsResidual`(x, om, Pdir, Pslave, Pmaster, mu, N0, ...)
`JenkinsJacobian`(x, om, Pdir, Pslave, Pmaster, mu, N0, ...)

Module Contents¶

pyHarm.Elements.NodeToNodeElements.Jenkins.JenkinsCorLoop_jax(x_k, k, DFT, limit_friction_force)¶

pyHarm.Elements.NodeToNodeElements.Jenkins.JenkinsResidual_jax(x, om, Pdir, Pslave, Pmaster, mu, N0, k, DFT, DTF, f_time_n=0.0)¶

pyHarm.Elements.NodeToNodeElements.Jenkins.jaxf¶

pyHarm.Elements.NodeToNodeElements.Jenkins.jaxf = None¶

pyHarm.Elements.NodeToNodeElements.Jenkins.JenkinsCorLoop(x_k, k, dx_kdx_j, DFT, limit_friction_force)¶

pyHarm.Elements.NodeToNodeElements.Jenkins.JenkinsResidual(x, om, Pdir, Pslave, Pmaster, mu, N0, k, DFT, DTF)¶

pyHarm.Elements.NodeToNodeElements.Jenkins.JenkinsJacobian(x, om, Pdir, Pslave, Pmaster, mu, N0, k, DFT, DTF)¶

class pyHarm.Elements.NodeToNodeElements.Jenkins.Jenkins(nh: int, nti: int, name: str, data: dict, CS: pyHarm.CoordinateSystem.CoordinateSystem)¶

Bases: pyHarm.Elements.NodeToNodeElements.NodeToNodeElement.NodeToNodeElement

This element is jenkins element, modeling a friction contact using an approximate Coulomb law considering a linear spring behavior when stuck.

mu¶

friction coefficient.

Type:: float

N0¶

normal preload on the element.

Type:: float

k¶

linear spring value.

Type:: foat

jac¶

if “analytical” uses analytical expression of jacobian, if “jax” uses automatic differentiation, if “DF” uses finite difference.

Type:: str

factory_keyword: str = 'Jenkins'¶

keyword that is used to call the creation of this class in the system factory.

Type:: str

__post_init__()¶

__flag_update__()¶

_evalJaco_ana(xg, om, *args)¶

_evalJaco_jax(xg, om, *args)¶

adim(lc, wc)¶

Modifies the element properties according to the characteristic length and angular frequency.

k¶

modified linear coefficient to apply according to the characteristic parameters.

Type:: float

flag_adim¶

True if equations are to be adimensionalized

Type:: bool

evalResidual(xg, om)¶

Computes the residual.

Parameters:

xg (np.ndarray) – full displacement vector.
om (float) – angular frequency value.

Returns:

residual vector.

Return type:

np.ndarray

evalJacobian(xg, om)¶

Computes the jacobians.

Parameters:

xg (np.ndarray) – full displacement vector.
om (float) – angular frequency value.

Returns:

Jacobian with respect to displacement. np.ndarray: Jacobian with respect to angular frequency.

Return type:

np.ndarray