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GSSSS Class Reference

A GSSSS class defines a solver using GSSSS algorithm. More...

#include <GSSSS.h>

Inheritance diagram for GSSSS:
Collaboration diagram for GSSSS:

Public Member Functions

 GSSSS (unsigned)
 
void assemble_resistance () override
 
void assemble_matrix () override
 
vec get_force_residual () override
 
vec get_displacement_residual () override
 
sp_mat get_reference_load () override
 
int process_load () override
 
int process_constraint () override
 
int process_load_resistance () override
 
int process_constraint_resistance () override
 
int update_trial_status () override
 
void update_parameter (double) override
 
vec from_incre_velocity (const vec &, const uvec &) override
 
vec from_incre_acceleration (const vec &, const uvec &) override
 
void print () override
 
- Public Member Functions inherited from ImplicitIntegrator
constexpr IntegratorType type () const override
 
bool time_independent_matrix () const override
 
 Integrator (unsigned=0)
 
 Integrator (const Integrator &)=delete
 
 Integrator (Integrator &&)=delete
 
- Public Member Functions inherited from Integrator
 Integrator (unsigned=0)
 
 Integrator (const Integrator &)=delete
 
 Integrator (Integrator &&)=delete
 
Integratoroperator= (const Integrator &)=delete
 
Integratoroperator= (Integrator &&)=delete
 
 ~Integrator () override=default
 
void set_domain (const weak_ptr< DomainBase > &)
 
shared_ptr< DomainBaseget_domain () const
 
virtual int initialize ()
 
virtual constexpr IntegratorType type () const
 
void set_time_step_switch (bool)
 
bool allow_to_change_time_step () const
 
void set_matrix_assembled_switch (bool)
 
bool matrix_is_assembled () const
 
virtual bool has_corrector () const
 
virtual bool time_independent_matrix () const
 
virtual int process_load ()
 
virtual int process_constraint ()
 
virtual int process_criterion ()
 
virtual int process_modifier ()
 
virtual int process_load_resistance ()
 
virtual int process_constraint_resistance ()
 
void record () const
 
virtual void assemble_resistance ()
 
virtual void assemble_matrix ()
 
virtual vec get_force_residual ()
 
virtual vec get_displacement_residual ()
 
virtual vec get_auxiliary_residual ()
 
virtual sp_mat get_reference_load ()
 
virtual const vec & get_trial_displacement () const
 
virtual void update_load ()
 
virtual void update_constraint ()
 
virtual void update_trial_load_factor (double)
 
virtual void update_trial_load_factor (const vec &)
 
virtual void update_from_ninja ()
 
virtual void update_trial_time (double)
 
virtual void update_incre_time (double)
 
virtual int update_trial_status ()
 
virtual int correct_trial_status ()
 
virtual int sync_status (bool)
 
virtual int update_internal (const mat &)
 
mat solve (const mat &)
 
mat solve (const sp_mat &)
 
mat solve (mat &&)
 
mat solve (sp_mat &&)
 
virtual int solve (mat &, const mat &)
 
virtual int solve (mat &, const sp_mat &)
 
virtual int solve (mat &, mat &&)
 
virtual int solve (mat &, sp_mat &&)
 
virtual void erase_machine_error (vec &) const
 
void stage_and_commit_status ()
 
virtual void stage_status ()
 
virtual void commit_status ()
 
virtual void clear_status ()
 
virtual void reset_status ()
 
virtual void update_parameter (double)
 
virtual vec from_incre_velocity (const vec &, const uvec &)
 
virtual vec from_incre_acceleration (const vec &, const uvec &)
 
virtual vec from_total_velocity (const vec &, const uvec &)
 
virtual vec from_total_acceleration (const vec &, const uvec &)
 
vec from_incre_velocity (double, const uvec &)
 
vec from_incre_acceleration (double, const uvec &)
 
vec from_total_velocity (double, const uvec &)
 
vec from_total_acceleration (double, const uvec &)
 
- Public Member Functions inherited from Tag
 Tag (unsigned=0)
 
 Tag (const Tag &)=default
 
 Tag (Tag &&)=default
 
Tagoperator= (const Tag &)=delete
 
Tagoperator= (Tag &&)=delete
 
virtual ~Tag ()=default
 
void set_tag (unsigned) const
 
unsigned get_tag () const
 
void enable ()
 
void disable ()
 
void guard ()
 
void unguard ()
 
bool is_active () const
 
bool is_guarded () const
 
virtual void print ()
 

Protected Member Functions

template<typename T >
void generate_constants (double, double, double)
 
template<>
void generate_constants (const double R3, const double R1, const double R2)
 
template<>
void generate_constants (const double R3, const double R1, const double R2)
 
template<>
void generate_constants (const double R, double, double)
 

Protected Attributes

const double L1
 
const double L2
 
const double L4
 
double L3 = 0.
 
double L5 = 0.
 
double W1 = 0.
 
double W3G3 = 0.
 
double W2G5 = 0.
 
double W1G6 = 0.
 
double DT = 0.
 
double C0 {0.}
 
double C1 {0.}
 
double C2 {0.}
 
double C3 {0.}
 
double C4 {0.}
 
double XD {0.}
 
double XV {0.}
 
double XA {0.}
 

Detailed Description

A GSSSS class defines a solver using GSSSS algorithm.

Advances in Computational Dynamics of Particles, Materials and Structures

ISBN: 978-1-119-96692-0

Author
tlc
Date
15/04/2022
Version
0.1.0

Constructor & Destructor Documentation

◆ GSSSS()

GSSSS::GSSSS ( unsigned  T)
explicit

Member Function Documentation

◆ assemble_matrix()

void GSSSS::assemble_matrix ( )
overridevirtual

Assemble the global effective matrix A in AX=B. For FEM applications, it is often a linear combination of stiffness, mass, damping and geometry matrices.

Reimplemented from Integrator.

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◆ assemble_resistance()

void GSSSS::assemble_resistance ( )
overridevirtual

Reimplemented from Integrator.

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◆ from_incre_acceleration()

vec GSSSS::from_incre_acceleration ( const vec &  ,
const uvec &  encoding 
)
overridevirtual

When external loads are applied, they can be applied in forms of displacement/velocity/acceleration. The time integration methods, by default, form effective stiffness matrices in displacement domain. That is, in AX=B, A is the effective stiffness matrix and X is the displacement increment. Thus, loads in velocity/acceleration must be converted to displacement. This cannot be done arbitrarily due to compatibility issues. This method takes acceleration increment and converts it to TOTAL displacement.

Reimplemented from Integrator.

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◆ from_incre_velocity()

vec GSSSS::from_incre_velocity ( const vec &  ,
const uvec &  encoding 
)
overridevirtual

When external loads are applied, they can be applied in forms of displacement/velocity/acceleration. The time integration methods, by default, form effective stiffness matrices in displacement domain. That is, in AX=B, A is the effective stiffness matrix and X is the displacement increment. Thus, loads in velocity/acceleration must be converted to displacement. This cannot be done arbitrarily due to compatibility issues. This method takes velocity increment and converts it to TOTAL displacement.

Reimplemented from Integrator.

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◆ generate_constants() [1/4]

template<>
void GSSSS::generate_constants ( const double  R,
double  ,
double   
)
protected

◆ generate_constants() [2/4]

template<>
void GSSSS::generate_constants ( const double  R3,
const double  R1,
const double  R2 
)
protected

◆ generate_constants() [3/4]

template<>
void GSSSS::generate_constants ( const double  R3,
const double  R1,
const double  R2 
)
protected

◆ generate_constants() [4/4]

template<typename T >
void GSSSS::generate_constants ( double  ,
double  ,
double   
)
inlineprotected

◆ get_displacement_residual()

vec GSSSS::get_displacement_residual ( )
overridevirtual

Assemble the global residual vector in displacement-controlled solving schemes. Apart from the global resistance and external load vectors, the reference load vector shall also be considered.

Reimplemented from Integrator.

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◆ get_force_residual()

vec GSSSS::get_force_residual ( )
overridevirtual

Assemble the global residual vector in load-controlled solving schemes.

Reimplemented from Integrator.

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◆ get_reference_load()

sp_mat GSSSS::get_reference_load ( )
overridevirtual

Reimplemented from Integrator.

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◆ print()

void GSSSS::print ( )
overridevirtual

Reimplemented from Tag.

◆ process_constraint()

int GSSSS::process_constraint ( )
overridevirtual

The main task of this method is to apply constraints (of various forms implemented in various methods). Combinations of different types need to be considered: 1) homogeneous, 2) inhomogeneous, 3) linear, 4) nonlinear. Combinations of different methods need to be considered: 1) penalty, 2) multiplier. On exit, the global stiffness matrix should be updated, the global residual vector should be updated.

Reimplemented from Integrator.

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◆ process_constraint_resistance()

int GSSSS::process_constraint_resistance ( )
overridevirtual

This method is similar to process_constraint(), but it only updates the global residual vector. The global stiffness matrix is not touched as in some solving schemes, the global stiffness matrix is only assembled and factorised once at the beginning. Subsequent iterations do not assemble the global stiffness matrix again and reuse the factorised matrix. In this case, the factorised matrix cannot be modified.

Reimplemented from Integrator.

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◆ process_load()

int GSSSS::process_load ( )
overridevirtual

Reimplemented from Integrator.

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◆ process_load_resistance()

int GSSSS::process_load_resistance ( )
overridevirtual

Reimplemented from Integrator.

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◆ update_parameter()

void GSSSS::update_parameter ( double  )
overridevirtual

When time step changes, some parameters may need to be updated.

Reimplemented from Integrator.

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◆ update_trial_status()

int GSSSS::update_trial_status ( )
overridevirtual

Reimplemented from Integrator.

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Member Data Documentation

◆ C0

double GSSSS::C0 {0.}
protected

◆ C1

double GSSSS::C1 {0.}
protected

◆ C2

double GSSSS::C2 {0.}
protected

◆ C3

double GSSSS::C3 {0.}
protected

◆ C4

double GSSSS::C4 {0.}
protected

◆ DT

double GSSSS::DT = 0.
protected

◆ L1

const double GSSSS::L1
protected

◆ L2

const double GSSSS::L2
protected

◆ L3

double GSSSS::L3 = 0.
protected

◆ L4

const double GSSSS::L4
protected

◆ L5

double GSSSS::L5 = 0.
protected

◆ W1

double GSSSS::W1 = 0.
protected

◆ W1G6

double GSSSS::W1G6 = 0.
protected

◆ W2G5

double GSSSS::W2G5 = 0.
protected

◆ W3G3

double GSSSS::W3G3 = 0.
protected

◆ XA

double GSSSS::XA {0.}
protected

◆ XD

double GSSSS::XD {0.}
protected

◆ XV

double GSSSS::XV {0.}
protected

The documentation for this class was generated from the following files: