Hello everyone,
I'm experiencing some kind of problem working with model reduction
functionality in chrono.
I'm using the ChModalAssembly for modeling and reduction (as repented
in the tutorial)
First I create the system
```
ChSystemNSC sys; auto qr_solver = chrono_types::make_shared<ChSolverSparseQR
>(); sys.SetSolver(qr_solver);
....
```
Then creating my model object
```
auto sp = chrono_types::make_shared<Pannel>();
sys.Add(sp);
```
The mesh is loaded from external TetGen file
```
ChMeshFileLoader::FromTetGenFile(mesh_internal, ///< destination mesh
pathToNodesFile.c_str(), ///< name of the .node file pathToEleFile.c_str(),
///< name of the .ele file mmaterial, ///< material for the created
tetahedrons VNULL, ///< optional displacement of imported mesh ChMatrix33<>(
1) ///< optional rotation/scaling of imported mesh );
```
Then I do the reduction
```
SetModalMode(true); SwitchModalReductionON( nModes, // The number of modes
to retain from modal reduction, or a ChModalSolveUndamped with more settings
ChModalDampingRayleigh(0.001, 0.005) // The damping model - Optional
parameter: default is ChModalDampingNone(). );
```
After the reduction the program crashes with SEGV at either
```
ComputeModesDamped(10);
```
or (if the above is commented out) at
```
sys.DoStepDynamics(step_size);
```
The model has 1302 nodes and 3441 elements
It's very frustrating since I don't know where my mistake may be
Thanks in advance for your help
Regards,
Victor
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