Constraints< DeviceType > Struct Template Reference

Kynema API: kynema::Constraints< DeviceType > Struct Template Reference

Kynema API

A flexible multibody structural dynamics code for wind turbines

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Container class for managing multiple constraints in a simulation. More...

#include <constraints.hpp>

Public Types
template<typename ValueType >
using	View = Kokkos::View< ValueType, DeviceType >

template<typename ValueType >
using	ConstView = typename View< ValueType >::const_type

Public Member Functions
	Constraints (std::span< const constraints::Constraint > constraints, std::span< const Node > nodes)

template<typename ArrayType >
void	UpdateDisplacement (size_t constraint_id, const ArrayType &disp) const
	Sets the new displacement for the given constraint.

void	UpdateViews ()
	Transfers new prescribed displacements and control signals to Views.

Static Public Member Functions
static std::array< double, 3 >	CalculateX0 (const constraints::Constraint &constraint, const Node &target_node, const Node &base_node)
	Calculates the initial relative position (X0) based on constraint type and nodes.

static std::array< std::array< double, 3 >, 3 >	CalculateAxes (const constraints::Constraint &constraint, const std::array< double, 3 > &x0)
	Calculates the rotation axes for a constraint based on its type and configuration.

Public Attributes
size_t	num_constraints

size_t	num_dofs

View< constraints::ConstraintType * >	type

std::vector< double * >	control_signal

View< size_t * >	base_node_index

View< size_t * >	target_node_index

View< Kokkos::pair< size_t, size_t > * >	row_range

View< dof::FreedomSignature * >	base_node_freedom_signature

View< dof::FreedomSignature * >	target_node_freedom_signature

View< size_t * >	base_active_dofs

View< size_t * >	target_active_dofs

View< size_t *[6]>	base_node_freedom_table

View< size_t *[6]>	target_node_freedom_table

View< double *[3]>	X0

View< double *[3][3]>	axes

View< double *[7]>	input

View< double *[3]>	output

View< double *[6]>	lambda

View< double *[7]>::HostMirror	host_input

View< double *[3]>::HostMirror	host_output

View< double *[6]>	residual_terms

View< double *[6]>	base_lambda_residual_terms

View< double *[6]>	target_lambda_residual_terms

View< double *[6]>	system_residual_terms

View< double *[6][6]>	base_gradient_terms

View< double *[6][6]>	target_gradient_terms

View< double *[6][6]>	base_gradient_transpose_terms

View< double *[6][6]>	target_gradient_transpose_terms

Detailed Description

template<typename DeviceType>
struct kynema::Constraints< DeviceType >

Container class for managing multiple constraints in a simulation.

Manages a collection of constraints between nodes, including their properties, freedom signatures, and computational data structures. This class handles both single-node boundary conditions and two-node constraints (like joints). It provides facilities for:

Storing constraint properties (types, node indices, axes)
Managing degrees of freedom and freedom signatures
Handling control signals and prescribed displacements
Maintaining computational views for residuals and gradients