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#4669 Use the average of the node elements for nodal gradient calculation.

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This commit is contained in:
Kristian Bendiksen
2020-02-03 11:38:44 +01:00
parent 4106780102
commit 235dd1a2c0
1 changed files with 42 additions and 23 deletions
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65
ApplicationCode/GeoMech/GeoMechDataModel/RigFemPartResultsCollection.cpp
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@@ -1117,6 +1117,7 @@ RigFemScalarResultFrames* RigFemPartResultsCollection::calculateNodalGradient( i
float inf = std::numeric_limits<float>::infinity();
const std::vector<cvf::Vec3f>& nodeCoords = femPart->nodes().coordinates;
size_t nodeCount = femPart->nodes().nodeIds.size();
int frameCount = srcDataFrames->frameCount();
for ( int fIdx = 0; fIdx < frameCount; ++fIdx )
@@ -1135,36 +1136,54 @@ RigFemScalarResultFrames* RigFemPartResultsCollection::calculateNodalGradient( i
int elementCount = femPart->elementCount();
for ( int elmIdx = 0; elmIdx < elementCount; ++elmIdx )
for ( long nodeIdx = 0; nodeIdx < static_cast<long>( nodeCount ); nodeIdx++ )
{
RigElementType elmType = femPart->elementType( elmIdx );
const std::vector<int> elements = femPart->elementsUsingNode( nodeIdx );
if ( !( elmType == HEX8P ) ) continue;
// Find the corner coordinates and values for the node
std::array<cvf::Vec3d, 8> hexCorners;
std::array<double, 8> cornerValues;
int elmNodeCount = RigFemTypes::elmentNodeCount( elmType );
for ( int elmNodIdx = 0; elmNodIdx < elmNodeCount; ++elmNodIdx )
// Compute the average of the elements contributing to this node
cvf::Vec3d result = cvf::Vec3d::ZERO;
int nValidElements = 0;
for ( int elmIdx : elements )
{
size_t elmNodResIdx = femPart->elementNodeResultIdx( elmIdx, elmNodIdx );
int nodeIdx = femPart->resultValueIdxFromResultPosType( RIG_NODAL, elmIdx, elmNodIdx );
RigElementType elmType = femPart->elementType( elmIdx );
if ( elmType == HEX8P )
{
// Find the corner coordinates and values for the node
std::array<cvf::Vec3d, 8> hexCorners;
std::array<double, 8> cornerValues;
cornerValues[elmNodIdx] = srcFrameData[nodeIdx];
hexCorners[elmNodIdx] = cvf::Vec3d( nodeCoords[nodeIdx] );
int elmNodeCount = RigFemTypes::elmentNodeCount( elmType );
for ( int elmNodIdx = 0; elmNodIdx < elmNodeCount; ++elmNodIdx )
{
size_t elmNodResIdx = femPart->elementNodeResultIdx( elmIdx, elmNodIdx );
size_t resultValueIdx = femPart->resultValueIdxFromResultPosType( RIG_NODAL, elmIdx, elmNodIdx );
cornerValues[elmNodIdx] = srcFrameData[resultValueIdx];
hexCorners[elmNodIdx] = cvf::Vec3d( nodeCoords[resultValueIdx] );
}
std::array<cvf::Vec3d, 8> gradients = RigHexGradientTools::gradients( hexCorners, cornerValues );
for ( int elmNodIdx = 0; elmNodIdx < elmNodeCount; ++elmNodIdx )
{
size_t elmNodResIdx = femPart->elementNodeResultIdx( elmIdx, elmNodIdx );
size_t resultValueIdx = femPart->resultValueIdxFromResultPosType( RIG_NODAL, elmIdx, elmNodIdx );
// Only use the gradient for particular corner corresponding to the node
if ( static_cast<size_t>( nodeIdx ) == resultValueIdx )
{
result.add( gradients[elmNodIdx] );
}
}
nValidElements++;
}
}
std::array<cvf::Vec3d, 8> gradients = RigHexGradientTools::gradients( hexCorners, cornerValues );
for ( int elmNodIdx = 0; elmNodIdx < elmNodeCount; ++elmNodIdx )
if ( nValidElements > 0 )
{
size_t elmNodResIdx = femPart->elementNodeResultIdx( elmIdx, elmNodIdx );
int nodeIdx = femPart->resultValueIdxFromResultPosType( RIG_NODAL, elmIdx, elmNodIdx );
dstFrameDataX[nodeIdx] = gradients[elmNodIdx].x();
dstFrameDataY[nodeIdx] = gradients[elmNodIdx].y();
dstFrameDataZ[nodeIdx] = gradients[elmNodIdx].z();
dstFrameDataX[nodeIdx] = result.x() / static_cast<double>( nValidElements );
dstFrameDataY[nodeIdx] = result.y() / static_cast<double>( nValidElements );
dstFrameDataZ[nodeIdx] = result.z() / static_cast<double>( nValidElements );
}
}