source: issm/trunk-jpl/src/c/solutionsequences/solutionsequence_nonlinear.cpp@ 23587

Last change on this file since 23587 was 23587, checked in by Mathieu Morlighem, 6 years ago

CHG: simplifying some functions now that nodes and loads are for one single analysis
File size: 3.9 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);
68 Reduceloadx(pf, Kfs, ys); delete Kfs;
69 femmodel->profiler->Start(SOLVER);
70 Solverx(&uf, Kff, pf, old_uf, df, femmodel->parameters);
71 femmodel->profiler->Stop(SOLVER);
72
73 Mergesolutionfromftogx(&ug, uf,ys,femmodel->nodes,femmodel->parameters);delete ys;
74
75 convergence(&converged,Kff,pf,uf,old_uf,eps_res,eps_rel,eps_abs); delete Kff; delete pf; delete df;
76 InputUpdateFromConstantx(femmodel,converged,ConvergedEnum);
77 InputUpdateFromSolutionx(femmodel,ug);
78
79 ConstraintsStatex(&constraints_converged,&num_unstable_constraints,femmodel);
80 if(VerboseConvergence()) _printf0_(" number of unstable constraints: " << num_unstable_constraints << "\n");
81
82 //rift convergence
83 if (!constraints_converged) {
84 if (converged){
85 if (num_unstable_constraints <= min_mechanical_constraints) converged=true;
86 else converged=false;
87 }
88 }
89
90 /*Increase count: */
91 count++;
92 if(converged==true){
93 femmodel->results->AddResult(new GenericExternalResult<IssmDouble>(femmodel->results->Size()+1,StressbalanceConvergenceNumStepsEnum,count));
94 break;
95 }
96 if(count>=max_nonlinear_iterations){
97 _printf0_(" maximum number of nonlinear iterations (" << max_nonlinear_iterations << ") exceeded\n");
98 converged=true;
99 femmodel->results->AddResult(new GenericExternalResult<IssmDouble>(femmodel->results->Size()+1,StressbalanceConvergenceNumStepsEnum,max_nonlinear_iterations));
100 InputUpdateFromConstantx(femmodel,converged,ConvergedEnum);
101 InputUpdateFromSolutionx(femmodel,ug);
102 break;
103 }
104 }
105
106 if(VerboseConvergence()) _printf0_("\n total number of iterations: " << count << "\n");
107
108 /*clean-up*/
109 if(conserve_loads){
110 delete femmodel->loads;
111 int index=femmodel->AnalysisIndex(configuration_type);
112 femmodel->loads_list[index]=savedloads;
113 femmodel->loads=savedloads;
114 }
115 delete uf;
116 delete ug;
117 delete old_uf;
118}
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