source: issm/trunk-jpl/src/c/solutionsequences/solutionsequence_nonlinear.cpp@ 21451

Last change on this file since 21451 was 21451, checked in by Mathieu Morlighem, 8 years ago

CHG: number of iterations displayed is off
File size: 3.7 KB
Line 
1/*!\file: solutionsequence_nonlinear.cpp
2 * \brief: core of a non-linear solution, using fixed-point method
3 */
4
5#include "./solutionsequences.h"
6#include "../toolkits/toolkits.h"
7#include "../classes/classes.h"
8#include "../shared/shared.h"
9#include "../modules/modules.h"
10
11void solutionsequence_nonlinear(FemModel* femmodel,bool conserve_loads){
12
13 /*intermediary: */
14 Matrix<IssmDouble>* Kff = NULL;
15 Matrix<IssmDouble>* Kfs = NULL;
16 Vector<IssmDouble>* ug = NULL;
17 Vector<IssmDouble>* uf = NULL;
18 Vector<IssmDouble>* old_uf = NULL;
19 Vector<IssmDouble>* pf = NULL;
20 Vector<IssmDouble>* df = NULL;
21 Vector<IssmDouble>* ys = NULL;
22
23 Loads* savedloads=NULL;
24 bool converged;
25 int constraints_converged;
26 int num_unstable_constraints;
27 int count;
28
29 /*parameters:*/
30 int min_mechanical_constraints;
31 int max_nonlinear_iterations;
32 int configuration_type;
33 IssmDouble eps_res,eps_rel,eps_abs;
34
35 /*Recover parameters: */
36 femmodel->parameters->FindParam(&min_mechanical_constraints,StressbalanceRiftPenaltyThresholdEnum);
37 femmodel->parameters->FindParam(&max_nonlinear_iterations,StressbalanceMaxiterEnum);
38 femmodel->parameters->FindParam(&eps_res,StressbalanceRestolEnum);
39 femmodel->parameters->FindParam(&eps_rel,StressbalanceReltolEnum);
40 femmodel->parameters->FindParam(&eps_abs,StressbalanceAbstolEnum);
41 femmodel->parameters->FindParam(&configuration_type,ConfigurationTypeEnum);
42 femmodel->UpdateConstraintsx();
43
44 /*Were loads requested as output? : */
45 if(conserve_loads){
46 savedloads = static_cast<Loads*>(femmodel->loads->Copy());
47 }
48
49 count=0;
50 converged=false;
51
52 /*Start non-linear iteration using input velocity: */
53 GetSolutionFromInputsx(&ug,femmodel);
54 Reducevectorgtofx(&uf, ug, femmodel->nodes,femmodel->parameters);
55
56 //Update once again the solution to make sure that vx and vxold are similar (for next step in transient or steadystate)
57 InputUpdateFromConstantx(femmodel,converged,ConvergedEnum);
58 InputUpdateFromSolutionx(femmodel,ug);
59
60 for(;;){
61
62 //save pointer to old velocity
63 delete old_uf;old_uf=uf;
64 delete ug;
65
66 SystemMatricesx(&Kff,&Kfs,&pf,&df,NULL,femmodel);
67 CreateNodalConstraintsx(&ys,femmodel->nodes,configuration_type);
68 Reduceloadx(pf, Kfs, ys); delete Kfs;
69 Solverx(&uf, Kff, pf, old_uf, df, femmodel->parameters);
70 Mergesolutionfromftogx(&ug, uf,ys,femmodel->nodes,femmodel->parameters);delete ys;
71
72 convergence(&converged,Kff,pf,uf,old_uf,eps_res,eps_rel,eps_abs); delete Kff; delete pf; delete df;
73 InputUpdateFromConstantx(femmodel,converged,ConvergedEnum);
74 InputUpdateFromSolutionx(femmodel,ug);
75
76 ConstraintsStatex(&constraints_converged,&num_unstable_constraints,femmodel);
77 if(VerboseConvergence()) _printf0_(" number of unstable constraints: " << num_unstable_constraints << "\n");
78
79 //rift convergence
80 if (!constraints_converged) {
81 if (converged){
82 if (num_unstable_constraints <= min_mechanical_constraints) converged=true;
83 else converged=false;
84 }
85 }
86
87 /*Increase count: */
88 count++;
89 if(converged==true){
90 femmodel->results->AddResult(new GenericExternalResult<IssmDouble>(femmodel->results->Size()+1,StressbalanceConvergenceNumStepsEnum,count));
91 break;
92 }
93 if(count>=max_nonlinear_iterations){
94 _printf0_(" maximum number of nonlinear iterations (" << max_nonlinear_iterations << ") exceeded\n");
95 converged=true;
96 femmodel->results->AddResult(new GenericExternalResult<IssmDouble>(femmodel->results->Size()+1,StressbalanceConvergenceNumStepsEnum,max_nonlinear_iterations));
97 InputUpdateFromConstantx(femmodel,converged,ConvergedEnum);
98 InputUpdateFromSolutionx(femmodel,ug);
99 break;
100 }
101 }
102
103 if(VerboseConvergence()) _printf0_("\n total number of iterations: " << count << "\n");
104
105 /*clean-up*/
106 if(conserve_loads){
107 delete femmodel->loads;
108 femmodel->loads=savedloads;
109 }
110 delete uf;
111 delete ug;
112 delete old_uf;
113}
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