Class representing the element matrices for a dynamic FEM problem based on Newmark time integration. More...
#include <NewmarkMats.h>
Inheritance diagram for NewmarkMats:
Collaboration diagram for NewmarkMats:
Public Member Functions | |
| NewmarkMats (double a1, double a2, double b=0.0, double c=0.0, bool generalizedAlpha=false) | |
| The constructor initializes the time integration parameters. More... | |
| virtual | ~NewmarkMats () |
| Empty destructor. | |
| virtual void | setStepSize (double dt, int it) |
| Updates the time step size and the isPredictor flag. More... | |
| virtual const Matrix & | getNewtonMatrix () const |
| Returns the element-level Newton matrix. | |
| virtual const Vector & | getRHSVector () const |
| Returns the element-level right-hand-side vector. | |
| const Vector & | dis (bool prev=false) const |
| Returns a const reference to current/previous displacement vector. | |
| const Vector & | vel (bool prev=false) const |
| Returns a const reference to current/previous velocity vector. | |
| const Vector & | acc (bool prev=false) const |
| Returns a const reference to current/previous velocity vector. | |
 Public Member Functions inherited from ElmMats | |
| ElmMats (bool lhs=true) | |
| Default constructor. | |
| virtual | ~ElmMats () |
| Empty destructor. | |
| void | resize (size_t nA, size_t nB, size_t nC=0) |
| Defines the number of element matrices and vectors. More... | |
| void | redim (size_t ndim) |
| Sets the dimension of the element matrices and vectors. More... | |
| virtual bool | empty () const |
| Checks if the element matrices are empty. | |
| void | printMat (std::ostream &os, size_t idx=0, const char *prefix=nullptr) const |
| Prints element matrix idx to output stream os. | |
| void | printVec (std::ostream &os, size_t idx=0, const char *prefix=nullptr) const |
| Prints element vector idx to output stream os. | |
| void | printScl (std::ostream &os, size_t idx=0, const char *prefix=nullptr) const |
| Prints element scalar idx to output stream os. | |
| Public Member Functions inherited from LocalIntegral | |
| virtual | ~LocalIntegral () |
| Empty destructor. | |
| virtual void | destruct () |
| Virtual destruction method to clean up after numerical integration. | |
| virtual const LocalIntegral * | ref () const |
| Returns the LocalIntegral object to assemble into the global one. | |
| void | getSolution (size_t nsd, size_t nen, Matrix *u=nullptr, Matrix *v=nullptr, Matrix *a=nullptr, bool forceCurrent=false) const |
| Extracts element solution vectors as nsd by nen matrices. More... | |
Protected Attributes | |
| bool | isPredictor |
| If true, we are in the predictor step. | |
| double | h |
| Time step size. | |
| double | alpha1 |
| Mass-proportional damping coefficient. | |
| double | alpha2 |
| Stiffness-proportional damping coefficient. | |
| double | beta |
| Newmark time integration parameter, β. | |
| double | gamma |
| Newmark time integration parameter, γ. | |
Private Attributes | |
| double | alpha_m |
| Generalized-alpha parameter, αm | |
| double | alpha_f |
| Generalized-alpha parameter, αf | |
| bool | slvDisp |
| If true, solve for displacement increments. | |
Additional Inherited Members | |
| Public Attributes inherited from ElmMats | |
| std::vector< Matrix > | A |
| The element coefficient matrices. | |
| std::vector< Vector > | b |
| The element right-hand-side vectors. | |
| std::vector< double > | c |
| The scalar quantities. | |
| std::vector< const char * > | Aname |
| Matrix names (for debug print) | |
| std::vector< const char * > | Bname |
| Vector names (for debug print) | |
| std::vector< const char * > | Cname |
| Scalar names (for debug print) | |
| bool | rhsOnly |
| If true, only the right-hand-sides are assembled. | |
| bool | withLHS |
| If true, left-hand-side element matrices are present. | |
| Public Attributes inherited from LocalIntegral | |
| Vectors | vec |
| Element-level primary solution vectors. | |
| Protected Member Functions inherited from LocalIntegral | |
| LocalIntegral () | |
| The default constructor is protected to allow sub-classes only. | |
Detailed Description
Class representing the element matrices for a dynamic FEM problem based on Newmark time integration.
Constructor & Destructor Documentation
◆ NewmarkMats()
| NewmarkMats::NewmarkMats | ( | double | a1, |
| double | a2, | ||
| double | b = 0.0, |
||
| double | c = 0.0, |
||
| bool | generalizedAlpha = false |
||
| ) |
The constructor initializes the time integration parameters.
- Parameters
-
[in] a1 Mass-proportional damping coefficient [in] a2 Stiffness-proportional damping coefficient [in] b Time integration parameter [in] c Time integration parameter [in] generalizedAlpha If true, interpret b and c as the generalized-alpha parameters αm and αf, respectively, otherwise as β and γ, respectively
References alpha1, alpha2, alpha_f, alpha_m, ElmMats::b, beta, ElmMats::c, gamma, and slvDisp.
Member Function Documentation
◆ setStepSize()
|
inlinevirtual |
Updates the time step size and the isPredictor flag.
- Parameters
-
[in] dt New time step size [in] it Newton-Raphson iteration counter
Reimplemented from ElmMats.
References h, and isPredictor.
The documentation for this class was generated from the following files:
- src/ASM/NewmarkMats.h
- src/ASM/NewmarkMats.C
