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doc:user:results:courbes_res [2020/11/16 12:29] – crutzendoc:user:results:courbes_res [2024/05/16 15:24] (current) – [Extracting mean elementary values] papeleux
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 Extract values stored in the data base, On geometrically defined point (positions, displacements, temperature, forces, velocities, ...).  Extract values stored in the data base, On geometrically defined point (positions, displacements, temperature, forces, velocities, ...). 
  
-  valueExtractor = DbGeoPointValueExtractor (pointList, mesh, field)+  valueExtractor = DbGeoPointValueExtractor (pointList, meshedObject, field) 
 +  valueExtractor = DbGeoPointValueExtractor (pointList, meshedObjectList, field)
   valueExtractor.setEulerian(True)    valueExtractor.setEulerian(True) 
   valueExtractor.setOutsideTol(tol)   valueExtractor.setOutsideTol(tol)
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 where where
  
-| ''listPt''  | List of points where the field is extracted                         | +| ''listPt''         | List of points where the field is extracted                         | 
-| ''mesh''    | Mesh from which the value is extracted                              |  +| ''meshObject''     | Meshed Object from where the point will try to find the element from which the value is interpolated |  
-| ''dbField'' | [[doc:user:general:locks|Field1D]] describing the scalar to extract |  +| ''meshObjectList'' | List of Mesh Meshed Object from where the point will try to find the element from which the value is interpolated |  
-| ''tol''     | Outside tolerance in terms of reduced coordinate (default = 0.2)    | +| ''dbField''        | [[doc:user:general:locks|Field1D]] describing the scalar to extract |  
 +| ''tol''            | Outside tolerance in terms of reduced coordinate (default = 0.2)    | 
  
  
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     pt102 = pointset.define(102,0.15*Lx,0.75*Ly,0)     # geo point of extraction (must be in pointset)     pt102 = pointset.define(102,0.15*Lx,0.75*Ly,0)     # geo point of extraction (must be in pointset)
-    dyPt102 = DbGeoPointValueExtractor([pt102,], geometry.getMesh(), Field1D(TY, RE))+    dyPt102 = DbGeoPointValueExtractor([pt102,], [volset(idx+1), volset(idx+2)], Field1D(TY, RE))
     dyPt102.setEulerian(True)                       # Eulerian point (not moving with elements)     dyPt102.setEulerian(True)                       # Eulerian point (not moving with elements)
     dyPt102.setOutsideTol(0.5)                      # half an element outside detection tolerance     dyPt102.setOutsideTol(0.5)                      # half an element outside detection tolerance
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 Value are interpolated from Integration Points Values. Value are interpolated from Integration Points Values.
  
-  valueExtractor = IFGeoPointValueExtractor (pointList, mesh, InternalField)+  valueExtractor = IFGeoPointValueExtractor (pointList, meshedObject, InternalField) 
 +  valueExtractor = IFGeoPointValueExtractor (pointList, meshedObjectList, InternalField)
   valueExtractor.setEulerian(True)    valueExtractor.setEulerian(True) 
   valueExtractor.setOutsideTol(tol)   valueExtractor.setOutsideTol(tol)
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 where where
  
-| ''listPt''  | List of points where the field is extracted                         | +| ''listPt''         | List of points where the field is extracted                         | 
-| ''mesh''    | Mesh from which the value is extracted                              |  +| ''meshObject''     | Meshed Object from where the point will try to find the element from which the value is interpolated |  
-| ''InternalField'' | [[doc:user:general:ifields|internal field]] of the element extrapolated in the node |  +| ''meshObjectList'' | List of Mesh Meshed Object from where the point will try to find the element from which the value is interpolated |  
-| ''tol''     | Outside tolerance in terms of reduced coordinate (default = 0.2)    | +| ''InternalField''  | [[doc:user:general:ifields|internal field]] of the element extrapolated in the node |  
 +| ''tol''            | Outside tolerance in terms of reduced coordinate (default = 0.2)    | 
  
 __Example:__ __Example:__
  
     pt102 = pointset.define(102,0.15*Lx,0.75*Ly,0)     # geo point of extraction (must be in pointset)     pt102 = pointset.define(102,0.15*Lx,0.75*Ly,0)     # geo point of extraction (must be in pointset)
-    eplPt102 = IFGeoPointValueExtractor([pt102,], geometry.getMesh(), IF_EPL) +    eplPt102 = IFGeoPointValueExtractor([pt102,], volset(101), IF_EPL) 
     eplPt102.setEulerian(True)                        # Eulerian point (not moving with elements)     eplPt102.setEulerian(True)                        # Eulerian point (not moving with elements)
     eplPt102.setOutsideTol(0.5)                       # half an element outside detection tolerance      eplPt102.setOutsideTol(0.5)                       # half an element outside detection tolerance 
          
  
-=== GeoPtValueExtractor ===+=== StrainGaugeValueExtractor ===
  
-Extract fields at a given position. Interpolates nodal value of the corresponding element. These nodal values are either variables stored in these nodes (positions, displacements, temperature, fores, velocities, ...) or an extrapolation and average of variables stored at the integration points.+It is possible to modelize a strainGauge in Metafor using GeoPointValueExtractors. Selecting the 2 geometrical points  (anywhere in the mesh) defining the Strain Gauge, the distance between the tho points can be computed during the simulation allowing to define a StrainGaufeValueExtractor. The strain measure define the kind of extractor : 
  
-  valueExtractor = GeoPtValueExtractor (listPt, mesh, field) +  valueExtractor = BiotStrainGaugeValueExtractor(listPt, meshedObject) 
-  valueExtractor = GeoPtValueExtractor (listPt, mesh, field, sOp = None)+  valueExtractor = BiotStrainGaugeValueExtractor(listPt, meshedObjectList) 
 +  valueExtractor = GLStrainGaugeValueExtractor(listPt, meshedObject) 
 +  valueExtractor = GLStrainGaugeValueExtractor(listPt, meshedObjectList) 
 +  valueExtractor = NatStrainGaugeValueExtractor(listPt, meshedObject) 
 +  valueExtractor = NatStrainGaugeValueExtractor(listPt, meshedObjectList)
  
 where where
  
-| ''listPt''  | List of points where the field is extracted | +| ''listPt''         | List of the 2 points defining the strain Gauge | 
-| ''mesh''    | Mesh from which the value is extracted |  +| ''meshObject''     | Meshed Object from where the point will try to find the element from which the value is interpolated |  
-| ''field''   | [[doc:user:general:locks|Field1D]] describing the scalar to extract or [[doc:user:general:ifields|internal field]] of the element extrapolated and averaged in the node |  +| ''meshObjectList'' | List of Mesh Meshed Object from where the point will try to find the element from which the value is interpolated |  
-| ''sOp''     | [[doc:user:general:SortingOperator|SortingOperator]] : sort nodes according to a geometric criterion  ''def=None'' will give the order in which these nodes are generated (not reliable) | +and if $\lambda = \frac{l}{l_0}$ the ratio of current to initial length of the Strain Gauge 
- +| BiotStrainGaugeValueExtractor | $\epsilon  = \lambda-1 = \frac{l}{l_0}-1$ (Engineer Strain) | 
-__Example:__ +| GLStrainGaugeValueExtractor   | $\epsilon  = 0.5*(\lambda^2-1) $ | 
- +| NatStrainGaugeValueExtractor  | $\epsilon  = ln(\lambda)$ |
-  valuesmanager.add(8, GeoPtValueExtractor ( [point1, point2], Field1D(T0,RE)), 'temperature_P1_P2')+
  
-Extract a result curve numbered 8 defined by the temperature in points 1 and 2. This curve is named ''temperature_P1_P2''. 
 === TdFieldValueExtractor === === TdFieldValueExtractor ===
  
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 |              | 3D : Topological volume | |              | 3D : Topological volume |
 | ''ifield''   | [[doc:user:general:ifields|internal field]] of the element extrapolated to the node |  | ''ifield''   | [[doc:user:general:ifields|internal field]] of the element extrapolated to the node | 
-|              | ''TX'' : X coordinate|  +|              | if ifield = TX, TY or TZ the extractor computes the current position of the Integration Point | 
-|              | ''TY'' : Y coordinate| +
-|              | ''TZ'' : Z coordinate|+
  
-:!: works, but :!::!::!:+:!: works, but it is difficult to select the topoCell :!::!::!:
  
-==== Extracting elementary values ====+=== IFGPInteractionValueExtractor=== 
 + 
 +Extract values of [[doc:user:general:ifields|internal fields]] at the integration points for all the elements of aninteraction. 
 + 
 +  valueExtractor = IFGPInteractionValueExtractor(inter, ifield) 
 + 
 +where  
 + 
 +| ''inter''   | Reference to a volumic interaction (FieldApplicator) | 
 +| ''ifield''  | [[doc:user:general:ifields|internal field]] of the element extrapolated to the node |  
 + 
 + 
 + 
 + 
 +==== Extracting mean elementary values ====
  
 === IFElementValueExtractor === === IFElementValueExtractor ===
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 |              | 2D : Topological face |  |              | 2D : Topological face | 
 |              | 3D : Topological volume | |              | 3D : Topological volume |
-| ''ifield''   | [[doc:user:general:ifields|internal field]] of the element extrapolated to the node | +| ''ifield''   | [[doc:user:general:ifields|internal field]] of the element averaged over the element |  
 + 
 +:!: works, but selection of the topoCell may be difficult :!::!::!: 
 + 
 +=== IFElementsValueExtractor === 
 + 
 +Extract values of [[doc:user:general:ifields|internal fields]] averaged on each element of an interaction (1 mean value by element). 
 + 
 +  valueExtractor = IFElementsValueExtractor (inter, ifield) 
 + 
 +where 
 + 
 +| ''inter'' | Reference to a volumic Interaction (FieldApplicator) | 
 +| ''ifield''   | [[doc:user:general:ifields|internal field]] of the element averaged over the element | 
  
-:!: works, but :!::!::!: 
  
 ==== Extracting analysis values (MiscValueExtractor) ==== ==== Extracting analysis values (MiscValueExtractor) ====
doc/user/results/courbes_res.1605526182.txt.gz · Last modified: 2020/11/16 12:29 by crutzen
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