ComputeFPIsolatorElasticity

Compute the forces and the stiffness matrix for a single concave Friction Pendulum isolator element.

Description

This material class calculates force and stiffness matrix terms of a Friction Pendulum<sup>TM</sup> (FP) isolator element. Further information on the theory of FP bearing can be found at FP Isolator theory. For detailed description on the usage of material with examples, refer to FP Isolator user

Input Parameters

  • aRate parameter.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Rate parameter.

  • betaBeta parameter of Newmark algorithm.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Beta parameter of Newmark algorithm.

  • conductivityThermal conductivity of steel.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Thermal conductivity of steel.

  • diffusivityThermal diffusivity of steel.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Thermal diffusivity of steel.

  • gammaGamma parameter of Newmark algorithm.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Gamma parameter of Newmark algorithm.

  • mu_refReference co-efficient of friction.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Reference co-efficient of friction.

  • p_refReference axial pressure.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Reference axial pressure.

  • pressure_dependentFalseSwitch for modeling friction dependence on the instantaneous pressure.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Switch for modeling friction dependence on the instantaneous pressure.

  • r_contactRadius of contact area at sliding surface.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Radius of contact area at sliding surface.

  • r_effEffective radius of curvature of sliding surface.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Effective radius of curvature of sliding surface.

  • temperature_dependentFalseSwitch for modeling friction dependence on the instantaneous temperature.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Switch for modeling friction dependence on the instantaneous temperature.

  • unitTag for conversion in the pressure factor computation when different unit systems are used. Enter 1 for N m s C; 2 for kN m s C; 3 for N mm s C; 4 for kN mm s C; 5 for lb in s C; 6 for kip in s C; 7 for lb ft s C; 8 for kip ft s C.

    C++ Type:unsigned int

    Controllable:No

    Description:Tag for conversion in the pressure factor computation when different unit systems are used. Enter 1 for N m s C; 2 for kN m s C; 3 for N mm s C; 4 for kN mm s C; 5 for lb in s C; 6 for kip in s C; 7 for lb ft s C; 8 for kip ft s C.

  • uyYield displacement of the bearing in shear.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Yield displacement of the bearing in shear.

  • velocity_dependentFalseSwitch for modeling friction dependence on the instantaneous sliding velocity.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Switch for modeling friction dependence on the instantaneous sliding velocity.

Required Parameters

  • blockThe list of blocks (ids or names) that this object will be applied

    C++ Type:std::vector<SubdomainName>

    Controllable:No

    Description:The list of blocks (ids or names) that this object will be applied

  • boundaryThe list of boundaries (ids or names) from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundaries (ids or names) from the mesh where this object applies

  • computeTrueWhen false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.

    Default:True

    C++ Type:bool

    Controllable:No

    Description:When false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.

  • constant_onELEMENTWhen ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

    Default:ELEMENT

    C++ Type:MooseEnum

    Options:NONE, ELEMENT, SUBDOMAIN

    Controllable:No

    Description:When ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

  • declare_suffixAn optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:An optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.

  • k_x1e+14Stiffness of the bearing in translation along x axis. Defaults to 10e13 (SI units)

    Default:1e+14

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Stiffness of the bearing in translation along x axis. Defaults to 10e13 (SI units)

  • k_xx1e+14Stiffness of the bearing in rotation about x axis. Defaults to 10e13 (SI units)

    Default:1e+14

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Stiffness of the bearing in rotation about x axis. Defaults to 10e13 (SI units)

  • k_yy1e+14Stiffness of the bearing in rotation about y axis. Defaults to 10e13 (SI units)

    Default:1e+14

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Stiffness of the bearing in rotation about y axis. Defaults to 10e13 (SI units)

  • k_zz1e+14Stiffness of the bearing in rotation about z axis. Defaults to 10e13 (SI units)

    Default:1e+14

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Stiffness of the bearing in rotation about z axis. Defaults to 10e13 (SI units)

  • maxiter100Maximum number of iterations for equilibrium. Defaults to 100.

    Default:100

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Maximum number of iterations for equilibrium. Defaults to 100.

  • tol1e-08Convergence tolerance to satisfy equilibrium of element. Defaults to 1e-8

    Default:1e-08

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Convergence tolerance to satisfy equilibrium of element. Defaults to 1e-8

Optional Parameters

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector<std::string>

    Controllable:No

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Controllable:Yes

    Description:Set the enabled status of the MooseObject.

  • implicitTrueDetermines whether this object is calculated using an implicit or explicit form

    Default:True

    C++ Type:bool

    Controllable:No

    Description:Determines whether this object is calculated using an implicit or explicit form

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Controllable:No

    Description:The seed for the master random number generator

  • use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

Advanced Parameters

  • output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)

    C++ Type:std::vector<std::string>

    Controllable:No

    Description:List of material properties, from this material, to output (outputs must also be defined to an output type)

  • outputsnone Vector of output names where you would like to restrict the output of variables(s) associated with this object

    Default:none

    C++ Type:std::vector<OutputName>

    Controllable:No

    Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object

Outputs Parameters

  • prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

  • use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.

Material Property Retrieval Parameters

Input Files