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The organization of program
Pentmesh : Mesh generation program
The creation function of element mesh from AutoCAD DXF file and the
interactive working menu in
Pentmesh.
You can create mesh generation with
various CAD functions, and can input material properties or loads in windows,
and can work all jobs with viewing.
PENPRE : Input data checking program
Penpre is almost similar with PENPOST. But it cannot display the
analysis result . It reads only the input file and show you a picture according
to the construction stages . Then, you can easily find the input errors.
FRONTDBX : 3D finite-element-analysis
program
There are three kinds of solvers, such as Frontal method, Skyline method or Block-skyline method.
Elasticity-Elasto-plastic and saturation-unsaturation seepage analysis function.
According to the varying groundwater level, the variation of the stress and
settlement can be analyzed. Especially, 3D seepage analysis is
a good feature. It can be used in stability analysis of
tunnel by 3D seepage analysis. The complicated staged
construction analysis can be possible, such as 'Excavation - Groundwater level
changing - Settlements - Excavation - Groundwater level changing - Settlements - ...'.
After the seepage analysis is applied, the obtained head-gradient is
applied automatically as the seepage force. So, the coupling analysis is done
automatically.
When the concrete lining is analyzed, the tensile ground spring is removed
automatically during the calculation in stiffness matrix. And
then, if the tensile ground spring is varied as compression state, it is included again in stiffness matrix at
next iteration.
PENPOST : Penpost displays the analysis result as a graphic.Contouring
and/or vectoring for the displacements, stresses, the
failure rate of the solid element, which the failure
rate represents the approaching ratio of the plastic
state, the member forces ( axial force, shear force,
bending moment ) and/or stresses of the frame and shell
elements, the axial forces and/or stresses of the truss
element, the member forces of the spring element.
About the solid element, it displays various analysis results
such as hydraulic gradient, flow vector, flow rate, pore water pressure, total
head and so on.
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