MIDAS Information Technology Co., Ltd. 2011.3.25
midas FEA V320
Table of Contents
New Feature
01 CFD Moving Mesh
Pre Process
01 File Open > File Preview
02 Extract Surface
03 Frame to Solid > Import
04 Tetra Auto mesh generation
05 Mesh options
06 Auto mesh Solid Function options
07 Protrude Mesh > Element Edge2D Mesh
08 Seeding definition
09 Mass Center > Node
10 Nonlinear Point spring
11 Tapered Beam > Section Template
Post Process
01 Quarter Mirror Mode
02 Combination/Envelop Results
03 Reaction Result Summations
04 Reinforcement Post Mesh Set
05 Heat of Hydration Result
Bug Fix List
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New Feature
(1) CFD Moving Mesh
Time Step 200
Time Step 400Time Step 600
• FEA now supports ALE(Arbitrary Lagrangian-Eulerian) technique using FSI(Fluid-Structure Interaction) analysis
• Stiffness (per unit span) considering the stiffness and mass matrix can also consider both modal and
structural damping.
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•Predict fluid and structural interaction behavior.
•Compute fluttering coefficients by performing buffeting and fluttering analysis.
Effects & Usage
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Pre Process – File open
•A new preview window displays information about the model pertaining to the number
of elements, nodes, and available results.
• 현재모델의 요소와 절점수를 바로 표현해 주는 기능 지원
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•This new feature allows users to quickly recognize files that have been completed
or in progress.
Effects & Usage
(1) File Preview Window & Status Bar
Number of Nodes and Elements
for Current Model
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Pre Process - Geometry
(2) Extract SurfaceExtract Surface
Surface Automesh
• Easy to use function to extract surfaces from solids.
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• This is a convenient feature which allows users to generate shell elements on top of solid elements.
Effects & Usage
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Pre Process - Geometry
(3) Enhanced Frame to Solid
•Enhanced Frame to Solid engine to import frame sections from Midas/Civil into FEA as geometry solids.
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• This enhancement allows easy import of tapered cross sections.
Effects & Usage
Midas/Civil
Geometry Solid
Automesh
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Pre Process – Mesh (1)
(4) Performance & GUI
Simplify GUI
Simplify GUI
•Up to 50% increase in Tetra Automesh generation.
•Separate Advanced option button includes Mesh Window and options.
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• Increase in meshing speeds can reduce modeling time.
• Separate meshing window allows users to easily navigate and select options.
Effects & Usage
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Pre Process – Mesh (2)
(5) Meshing
Previous
Align Edge
• Align Edge seed near inner loop option.
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• Improve element mesh and result accuracy for objects with void sections.
Effects & Usage
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Pre Process – Mesh (3)
(6) Add Options in Automesh Solid Function
If the geometry shape is feasible for
mapped mesh, try to execute it.
After automeshing, execute
remeshing to attain high mesh
quality.
Even if some parts fail to mesh,
try to execute mesh for all parts.
•Remesh and Map mesh options integrated into auto-mesh function.
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•These options can reduce the number of elements generated, increase analysis speeds by generating
higher mesh quality and improve overall accuracy of results.
Effects & Usage
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Pre Process – Mesh (4)
(7) Prutrude mesh (Extrude, Revolve, Sweep, Project, Offset, Fill)
• Uniform and non-uniform options can now control element’s length and division.
• Option to generate 2D elements directly from Element Edge.
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• Provide detail meshing tools for higher and more control over mesh generation.
• Geometry edges and also element edges can be extruded to generate 2D elements.
Effects & Usage
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Pre Process – Mesh (5)
(8) Seeding & Measure
Default seeds
showing numbers
Seeds adopting even
number option
Add Mass and Weight
• Seeding Option includes “Even Number of Seeds.”
• Measure Elements includes measure of Mass and Weight for 2D and 3D elements.
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• Conveniently generate mapped mesh elements by considering even number of seeds.
• Easily obtain information about the mass and weight for 2D and 3D elements.
Effects & Usage
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Pre Process – Mesh (6)
(9) Create Node
Creating node at mass center
• New option to define nodes based on the center of mass summation.
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• Easily impose concentrated loads or model rigid links at the Mass Center.
Effects & Usage
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Pre Process – Analysis>Property
(10) Nonlinear Point Spring
• Describe nonlinear point spring behavior using nonlinear elastic type.
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•Capture various type of nonlinear behavior using Point Spring.
Effects & Usage
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• Tapered Beam with Section TemplateUpgrade Contents
• From Tapered Beam, input characteristics include Section-i and Section-j cross section
• Easy input and visual representation considering cross characteristics.
Effects & Usage
(11) Tapered Beam: Section Template
Pre Process – Analysis>Property
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Post Process – Mirror Plane
(1) Quarter Mirror Mode in Post Processor
• 1/4 of a model can now be mirrored to display full model and corresponding results.
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• The mirror option saves time by allowing users to present symmetric or full model
with corresponding results from quarter of a model.
Effects & Usage
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Post Process
(2) Combination/Envelope Results
• New feature which can consider linear and moving loads as combinations with option to scale.
• Load combinations for both linear and envelope can be assigned with Max, Min, and Absolute.
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• Users can now study behavior due to load combinations.
• Increase post processor result extraction by assigning specific Max, Min, and Absolute definitions.
Effects & Usage
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Post Process
(3) Summation for Reactions
• (3) New function to calculate the summation of reactions.
• (4) Reinforcement tendon results are now displayed for each and every tendon mesh set.
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• (3) Ability to ensure and verify results by inspecting the reaction forces.
• (4) Easy viewing of results for reinforcement tendon.
Effects & Usage
(4) Reinforcement Post mesh Set
Distinguishes all pre
mesh sets as individual
post mesh sets
One post mesh
set Created
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Post Process
(5) Hydration Result in element
•Node & Stress Component results for Allowable Stress and Crack Ratio can be extracted
from node to element level. (Nodal Average checked off for Element)
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• Output results to the post processor at the element level.
• Averaged crack ratio and tensile strength at discontinuity Averaging.
Effects & Usage
Nodal Average Result Element Result
Crack Ratio(Normal)
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Bug Fix List – Pre/Post
(1) 3D Dxf import engine
Known Issue
- Misinterpretation and errors occurred when importing 1D lines from
CAD 3D dxf files.
(2) Saving model files that contains Arbitrary load assignment
- Arbitrary load assignments after saving and renaming model file
produced different results prior to saving the model file under
different name with the same arbitrary load.
Rename
- Modified arbitrary load assignment.
● File > import > Dxf 3D…
● File > import > Advanced Geometry > DWG/DXF…
Related Functions
Resolved
- Improved import 3D dxf engine.
● Analysis > Load > Arbitrary Load
Related Functions
Known Issue
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Bug Fix List – Pre/Post
(3) Error when interpreting shell to solid.
- Misinterpretation of shell from small sized solid geometry.
(4) Pre-Neutral Import Error
- Error occurs when importing pre-Neutral files.
Resolved
- Modified pre-neutral format to correctly register during import.
● Geometry > Solid > Shell -> Solid
Related Functions
Resolved
- Small sized solid geometry can correctly interpret shell shapes.
● File > Import > Pre-Neutral (FEA)
Related Functions
Known Issue
Known Issue
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Bug Fix List – Pre/Post
(5) Error in Batch Analysis for model files containing reinforcements
-Error occurs when performing batch analysis for models containing
reinforcements requested input command.
(6) Stress Linearization for Axisymmetric unable to consider step operations
- Unable to introduce steps when performing stress Linearization for
Axisymmetric models.
Resolved
- Modified Analysis Case to introduce steps when defined by user.
● Analysis > Batch Analysis
Related Functions
Resolved
- Modified batch analysis for model files containing reinforcements.
● Post > Stress Linearization for Axisymmetric
Related Functions
Known Issue
Known Issue
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Bug Fix List – Pre/Post
(7) Error in graph out for Time History Analysis
- Results displayed in output graph returns zero values for Time History
Analysis.
(8) Erroneous results extracted from Coordinates & Mesh using Local Direction Force Sum
- Incorrect results from Auto-mesh and Map-meshed elements when
using Local Direction Force Sum.
Resolved
- Modified Cutting Line in Local Direction Force Sum function.
● Post > Time History Analysis > Time History Graph
Related Functions
Resolved
-Results displayed in output graph register correctly for Time History
Analysis.
● Post > Local Direction Force Sum
Related Functions
Known Issue
Known Issue
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Bug Fix List - Analysis
(9) Error in Subspace and Lanczos Type when performing Eigenvalue analysis.
- Errors found in subspace and Lanczos type.
(10) Error in elastic link elements results in Time History/Eignenvalue analysis
- When performing Time History/Eigenvalue analysis, elastic link
elements exhibited non-linear behavior.
Resolved
- Modified iterative method to govern only linear behavior for elastic
link elements.
● Analysis Case > Analysis Control > Eigenvector Type
Related Functions
Resolved
- Modified Eigenvalue analysis to register both subspace and Lanczos
type.
Related Functions
Known Issue
Known Issue
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Bug Fix List - Analysis
(11) Error in Response Spectrum analysis when considering reinforcements.
- Solver failed to perform analysis for response spectrum analysis that
include reinforcement.
(12) Erroneous Reinforcement behavior in Time History analysis
- Reinforcements did not exhibit any changes in stiffness.
Resolved
- Modified Time History and reinforcement functions to consider
stiffness variation.
● Analysis > Analysis Case > Response Spectrum
Related Functions
Resolved
- Modified solver routine.
● Analysis > Analysis Case > Time History
Related Functions
Known Issue
Known Issue
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Bug Fix List - Analysis
(13) User Defined Load Step error for load step factor
- User Defined Load Step introducing load step factors other than value
‘1’ registered incorrect load step factors in subsequent construction
stages.
(14) Incorrect allowable stress calculations when user defined material is used in Heat of Hydration analysis
- User defined material used in heat of hydration analysis did not
update age values.
Resolved
- Age values correctly updated when user defined material is considered
in heat of hydration analysis.
● Analysis > Analysis Case > Construction Stage
Related Functions
Resolved
- Load factors and forces transfer correctly over to subsequent stages.
● Analysis > Analysis Case > Heat of Hydration
Related Functions
Known Issue
Known Issue