Structural program MONSTR-2.2
(register No 950413 by RosAPO)
The program is designed for dynamic and static
structural analysis of arbitrary textile shells undergoing distributed,
concentrated and body forces
| Main Info | Preprocessor
| Postprocessor | Processor | Run
MONSTR now | Example | Author
|
The name "MONSTR" is abbreviation "soft inflatable
structures" (in Russian).
This program is the main component of integrated
software and consists of 4 executive codes: Preprocessor,
Postprocessor,
Processor (computing code) and Patterner.
All the components are user-friendly and ergonomic codes.
The Processor is based on modified finite-element
method. The modifications allows to speed up the dynamic and static solution
and guarantee fast convergence in static case, to consider large deformations
(100% and more) and displacements, to deal with independent unmatched meshes
(see example) connecting them correctly "node
-to- element" as well as standard "node-to-node". The nonlinear behaviors
of orthotropic materials including softness of fabric and flexibility of
carcass are welcome. Only simplex finite elements are used: triangle for
fabric and cut for ribbon, cord or seam. Any shell construction can be
considered since there is no limitation in structure complexity and number
of elements. A large list of applicable boundary conditions enables to
simulate a lot of real situations. More about Processor? - [click
here]
The Preprocessor enables to create and/or
edit finite element (FE) system, loads, boundary conditions. There are
3 ways to build a mesh
-
draw / load a cutting-patterns (polylines or B-splines) which
are broken up into FE mesh in minutes by generator
-
create in CAD and export *.DXF (Drawing eXchange Format)
mesh file due to interface with CAD (ex. AutoCAD and 3D-Studio) and convert
it into FE system
-
build and/or edit FE system node-by-node and element-by-element;
One can work with one FE, group of FE, macro-element (detail), all FE system
owing to appropriate filters.
It is possible to change warp direction in details, type of material, load
just in seconds. No problem to work with very complex 3-dimensional structures
due to fast rotating, zooming, filtering, hiding and rendering procedures.
There are also autocorrectors to improve condensed and degenerated mesh
parts, to add and remove elements. Any macroelements can be stitched even
despite of unmatched meshes. The Preprocessor has material data base.
In order to assign aerodynamic load from CFD codes, the Preprocessor
has interfaces with programs
-
EXPRESS (built-in code for
tran- and supersonic decelerators),
-
PARAD-2.2 (high-speed compressible
flow; Mach=0.5-6.0),
-
DVM-2 (subsonic flow, Mach<0.5),
-
several analytical and semiempirical built-in codes simulating
wind action.
The Postprocessor displays results in multiwindow
color mode
-
stressing and deformation isograms
-
FE system and rendered shape of construction
-
acting forces (pressure, concentrated forces, reactions)
-
nodal velocity vector field
-
direction of warp and weft, wrinkles if any
-
boundary conditions
-
numerical data in any FE and node
It is possible to analyze and compare several structures simultaneously,
use full screen, capture screen, display full construction if symmetry
applied.
The Processor performs computing for ready
data file. The processing is animated on the screen and one can interrupt
/ correct it:
-
vary damping coefficient to speed up static solution
-
change time decrement assigned by Preprocessor
-
change load
-
simulate internal soap-film isotropic tensions in shell to
get optimized smoothed or equistressed envelope
The Patterner generates 2D patterns for any 3D
mesh (details of 3D surfaces).
In order to run the software via Internet, please,
visit our Calculator
or fill in and submit the data form.
See List of Papers
on this software background and applications.
Computed shapes of parachutes
The program enables to deal with complex 3D shapes
More examples of application? Click HERE to visit
Gallery.
The author and copyright owner -
Yuri
Mosseev (e-mail: yuri.mosseev@mtu-net.ru)
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