Finite Element Modeling
Structure primitives for 2D and 3D rigid frames and
trusses.
Library of Industrial Structures and Structures Gallery.
Civil engineer friendly graphic editor for creating FE
model of skeletal structures, shell structures and
spring elements with the following options:
- Nodes: Create / XYZ coordinates / Between two nodes
- Nodes: Move | Translate / Rotate / Mirror / Scale
- Nodes: Copy | Translate / Rotate / Mirror / Scale
- Nodes: Erase
- Nodes: Delete
- Elements: Add
- Elements: Modify
- Elements: Move / Translate / Rotate / Mirror
- Elements: Copy / Translate / Rotate / Mirror
- Elements: Split
- Elements: Merge
- Elements: Extend
- Elements: Erase
- Elements: Delete
- Connect Elements
- Import Structure
- Model verification
- Undo/Redo Operations for Editing
Powerful model verification allows for checking & rectifying the
presence of unconnected nodes on members (floating connections)
duplicate members and coincident nodes in the FE model. The user
can automatically, compact nodes and elements, reset element node
order based on geometric near node, reset origin to (Xmin, Ymin and
Zmin), renumber nodes and elements based on geometric nearness.
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- Rigid links can be specified and viewed
- Specified Property Ids (for example braces) can be ignored during
panel generation
- Beam elements can be extended/ shortened in the editor
- Shell elements can be converted from linear to quadratic and viceversa
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- Structural shape Library including generation of Domes, Cones
(frustums), Cylindrical shells (single, multiple), and folded plates,
with provision for generating a reticulate model (model with beam
elements)
- Easy to use feature of adding two different structural models from
Library / Gallery/ Industrial Structure / Bridge form/ Shape Library
with and without coordinate offsets
- Additional member renumbering schemes such as beams
columns, or columns beams
Bridge Module: Automatic FE-Generation of Bridge deck as
Beam/Grillage model.
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- Bridge form can be generated with automatic
shell element F.E. model based on
longitudinal and C/S properties.
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Interface to DISPLAY III/IV:
Complex and
intricate structures with shell elements can be
modeled using DISPLAY III/ IV; the Graphical Pre and Post processor
of NISA Family of finite element programs.
Interface to AutoCAD:
Export finite element
data from NISA/CIVIL as geometry data
into AutoCAD. Import geometry data in
DXF format from AutoCAD as finite
element data into NISA/ CIVIL. Elements
are automatically split and nodes are
introduced at points of intersections.
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- Improved AutoCAD DXF file interface with facility to import
member cross sections and column locations from plan
- Facility to add multiple DXF files for different plans with automatic
generation of columns
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User defined vehicle
- Automatic Generation of curved vehicle
and curved paths
- Generation of Offset Wheel Loads with
torsion (transfer of load on single member)
- Specify path by picking the nodes in sequence
- Specify path which is pre-defined in a text file
- Automatic generation of offset path for an existing path Id
- Automatic extension of existing path for a specified extension
length
- Reversing direction of an existing path automatically
- Members of selected property Ids only can be considered to
distribute wheel loads
- Vehicle loading height can be considered in
case of (Wind/ Braking/Seismic) forces
- Lateral loads can be considered
perpendicular to the path
Pressure Loads
Pressure Loads can be specified on shell
elements. Different values of pressure can be
specified on each node of a shell Element.
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- Shell elements subjected to varying pressures
- Shell pressures can be applied in global directions
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Load case dependent Member End Release
End release specification is linked to load case Id. The main
advantage of this approach is that, different end release condition for
an element can be specified in conjunction with loads, as analysis
with different load cases and can be done in single session.
Remodeling, multiple analysis and manual superposition of results
are avoided.
Load case dependent Inactive Member specification
This feature is particularly useful for performing construction
sequence analysis for a particular loading condition. This avoids
creating different types of structures and to perform independent
analysis as members specified as 'Inactive' will not be included while
formulating stiffness matrix and load vector.
- Line Loads: It is possible to specify varying line load on set of
elements which are on the same line
- Load information can be copied from one
load case to another load case
- It is possible to change physical property
of elements in a load case
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