Advanced Nonlinear Nonlinear and and Detail Detail Analysis Analysis Software Program Advanced
New Paradigm in Advanced Structural Analysis
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1
Overview
2
Geometry Modelling
3
Mesh Generation
4
Analysis
5
Post-processing
Configuration Geometry Modeller
Report Generator
Geometry modelling and clean-up
Mesh Generators
Various graphic plots and result tables
FEA
Post-processor
Auto, mapped and manual meshing
FEM Pre-processor
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FEM Solvers
Why midas FEA? Joint Detail
Concrete cracking
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Bridge Connection
Pier Deformation
Why midas FEA? Corrugated Steel-Web Bridge
Steel-Conc. Girder
Curved steel box girder Bridge Varying number of Webs or Bifurcating Webs
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Why midas FEA? Bolt connection
Local Buckling of orthotropic steel deck
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Splay saddle in suspension bridge
Bridge cross-section
Project Applications
Woon-Nam Extradosed Bridge
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Mode 1
Mode 2
Mode 8
Mode 9
Project Applications
JECHON-DODAM RAILWAY Steel Arch Bridge
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Project Applications Solid elements Modeling of Hanger Clamp (Bonny River Suspension Br.) FE Model
Stress Contour
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Project Applications Fatigue Analysis
Life Cycle Hyung Jae Grand Bridge
Damage www.MidasUser.com
Project Applications CFD Analysis
Grid around the Bridge Section
Velocity Distribution
Turbulence near the Bridge Section
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Project Applications Contact Analysis PL 268
PL 1.080
PL 397 (397)
DO
H- STIFF 1- PL- 130x10x1168
V- STIFF
V- STIFF
V- STIFF
DO
PL 312
DIAP
H- STIFF 1- PL- 130x10x1124
Deformed shapes
Gusset and web plates
Contact faces Pins www.MidasUser.com
Stress in contact faces
Framework Main Menu
Tabbed Toolbar Work Window
Works Tree Task Pane
Property Window
Table Window Output Window
Developed based-on Task-oriented Design Paradigm www.MidasUser.com
New Paradigm in Advanced Structural Analysis
www.MidasUser.com
1
Overview
2
Geometry Modeling
3
Mesh Generation
4
Analysis
5
Post-processing
Data Exchange
Import (Geometry) • • • • •
STEP, IGES ACIS*, Parasolid* MSC.Nastran. AutoCAD DWG / DXF MIDAS MxT files
Export (Geometry) • • •
STEP, IGES, BRep MSC/NASTRAN* Midas Civil/Gen
Standards for CAD Data Exchange STEP (STandard for the Exchange of Product Model Data) IGES (Initial Graphics Exchange Specification)
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Data Exchange Civil, Gen
FEA
Frame Model (General Section)
MCS Format Generated Solid Geometry
Analysis Model (3D Prism Mesh)
FrameSolid Wizard automatically generates Solid Geometry & Mesh by importing Frame Model (*.MCS) from Civil and Gen. www.MidasUser.com
MIDAS Information Technology Co., Ltd.
Geometry Modelling Modeling Capabilities
Midas Civil
Midas FEA
Point
O*
O
Curve
O*
O
Surface
O*
O
Solid
O*
O
Transformation
O*
O
Boolean
Merge*
O
Feature Generator
X
O
Feature Modifier
X
O
Repair
X
O
*With limitations compared to FEA
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Advanced Modelling Generation Guide Curve
Profile
Extrude
Sweep
Profiles
Loft Extrude
Revolve Profile
Loft
Profiles
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Advanced Modelling Modification
Local Prism (Fuse: Defined Height)
Trim Surfaces
Shell Fillet
Offset www.MidasUser.com
Chamfer
New Paradigm in Advanced Structural Analysis
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1
Overview
2
Geometry Modeling
3
Mesh Generation
4
Analysis
5
Post-processing
Mesh Generation Meshing Capabilities
Midas Civil
Midas FEA
Mesh Node
O
O
Mesh Linear Elements
O
O
Mesh Planar Elements
O*
O
Mesh Solid Elements
X
O
Auto Meshing without surface generation
X
O
Protrusion and Transformation of Mesh
X
O
Remeshing
X
O
Check Mesh
X
O
Quality Assurance
X
O
Adaptive Seeding
X
O
*With limitations compared to FEA
Generated Mesh www.MidasUser.com
Automatic Solid Meshing
FEA’s Tetra Mesher auto-generates tetrahedral solid mesh with variable sizes in smooth transition. (200,000 Tetra’s/min) FEA’s Tetra Mesher is capable of including holes, curves and points that are present in/on solids.
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Automatic Surface Meshing
FEA provides automatic defining & meshing function which defines mesh-able domains from curves (without creating surfaces) and then generates mesh for each domain.
Automatic defining & meshing function is very useful for complex 2D models which were originally modelled in AutoCAD.
Imported DXF Model (173 Domains) www.MidasUser.com
Automatically Defined Domains & Generated Meshes
Mesh Protrusion Extrude (2D3D)
Fill (Curve2D)
Sweep (2D3D) Scaled Sweep Guide Curve
Revolve (2D3D) www.MidasUser.com
Reinforcement Elements
Modelling Method • •
Embedded Bar (Incompatible Mesh) Truss (Compatible Mesh) + Interface (Slip, Friction)
Prism Map-Mesh
Embedded Bar (Incompatible)
Truss + Interface (Compatible)
Analysis Result
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Check & Quality Assurance
Check & Verify • • • • •
Free Edges Free Faces Manifold Edges Non-manifold Edges Check & Align ECS Check Free Face (Unconnected Element Face)
Quality Assurance • • • • • • • •
Aspect Ratio Skew Angle Taper (2D) Warpage (2D) Jacobian Ratio Twist Collapse (Tetra) Length / Area
Twisted Penta
Collapsed Tetra (Near Zero Volume) Mesh Quality Plot
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New Paradigm in Advanced Structural Analysis
www.MidasUser.com
1
Overview
2
Geometry Modeling
3
Mesh Generation
4
Analysis
5
Post-processing
Equation Solvers Equation Solvers
Direct Solvers: Minimized number of calculations for simultaneous linear equations - Multi-frontal Sparse Gaussian Solver (Default) supporting 64-bit OS and GPU-accelerated solver
- Skyline Solver Iterative Solvers: Efficient handling of large scale models and specific nonlinear problems - Preconditioned Conjugate Gradient (CG) - Generalized Minimal Residual (GMRES)
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MIDAS Information Technology Co., Ltd.
Analysis Capabilities Analysis Capabilities
Midas Civil
Midas FEA
Static Analysis
O
O
Construction Stage Analysis
O
O
Moving Load Analysis (User-defined)
O
O
Modal Analysis
O
O
Linear Buckling Analysis
O
O
Transient / Spectrum Response Analysis
O
O
Time History Analysis
O
O
Material / Geometry Nonlinearity Analysis
O*
O
Interface Nonlinearity Analysis
X
O
Reinforcement Nonlinearity Analysis
X
O
Cracking Analysis
X
O
Static/Explicit Contact Analysis
X
O
Heat Transfer Analysis
X
O
Heat of Hydration Analysis
O*
O
Fatigue Analysis
X
O
Fluid Dynamics Analysis (CFD Analysis)
X
O
*With limitations compared to FEA
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Linear Static Analysis Linear Static Analysis Multiple Load Cases Result Combination
Offshore Platform / Steel Frame Composed of Cylindrical Jackets (Plate + Frame)
Net Solution Times (Pentium4 3GHz, 1GB RAM) Stress Distribution of Jacket
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Eigenvalue Analysis Modal Analysis Lanczos Method Subspace Iteration
Linear Buckling Analysis Critical Load Factors Buckling Modes
Fig: Buckling Analysis of Steel Bridge (Global and Local) www.MidasUser.com
Dynamic Analysis Transient Response Analysis Direct Transient Response Modal Transient Response Time Forcing Function DB (54 Earthquake Acceleration Records)
Response Spectrum Analysis SRSS, CQC, ABS Design Spectrum DB
Time Forcing Function www.MidasUser.com
Material Nonlinearity Analysis Material Models
von Mises Tresca Mohr-Coulomb Drucker-Prager Rankine User-Supplied Material
Tendon Anchorage (Solid) - von Mises www.MidasUser.com
Nonlinear Behaviours Hardening (Isotropic) Softening
Iteration Methods
Full Newton-Raphson (Auto Load Step) Modified Newton-Raphson Arc-Length Method Initial Stiffness
Pinched Cylinder (Plate) – von Mises Material & Geometry Nonlinear Analysis
User-Supplied Materials In FEA, users can use their own defined material models via Fortran-coded library file. FEA’s user-supplied material model supports nonlinear elastic and elastoplastic behaviours. User-supplied material can be used seamlessly with all elements which Strain allow material nonlinear behaviours. Input Total Stress Stiffness Matrix Output USRMAT.DLL
USM Dialogue
User-defined Parameters Input Dialogue www.MidasUser.com
Nonlinear Elastic Material for Solid Element
Geometry Nonlinearity Analysis Methods Updated Lagrangian Total Lagrangian Co-rotational
Rectangular Tube (Plate) – Co-rotational www.MidasUser.com
Iteration Methods
Full Newton-Raphson (Auto Load Step) Modified Newton-Raphson Arc-Length Method Initial Stiffness
Ring (Solid) – Total Lagrangian
Interface Nonlinearity Analysis Interface Models
Coulomb Friction Discrete Cracking Dilatancy Crack Bond-Slip Nonlinear Elastic Combined (Cracking-Shearing-Crushing)
Steel
Interface
Concrete
Deformation (Discontinuity btwn Steel & Concrete) www.MidasUser.com
Steel-Concrete Composite Girder
Principal Stress (Virtually Transformed & Clipped View)
Heat Transfer and Heat of Hydration Analysis Visco-Elastic Models Creep-Shrinkage (Design Code) Temperature-Dependent Material
Parametric Analysis Multiple Material Sets Multiple BCs & Heat Sources Multiple Construction Sequences
Pier Table (Construction Stage) - Temperature www.MidasUser.com
Heat Transfer Steady-State & Transient Conduction, Convection, Cooling Pipe Heat Flux Heat Flow Temperature Gradient Display
Pier Table (Construction Stage) - Stress
Static Contact Analysis Lug (90mm)
Double plate (85mm) Pin (224mm )
Contact Force
Hanger of Arch Bridge (Lug-Pin Joint)
Deformation and Stress Distribution by Contact
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Cracking Analysis Cracking Models Total Strain Crack Smeared
Results
Crack Pattern (Crack Stress/Strain) Crack Width [Crack-Bandwidth (h)]*[Max. Principal Strain – (Max. Principal Stress/E)]
Element Status Cracking: Partially/Fully Open, Closed, Not Yet Plasticity: Previously Plastic, Elastic, Plastic, Critical Contact: No Contact, Slip, Stick • Symbols at Gauss Points • Disc Normal: Opening Direction • Disc Color : Stress Magnitude • Line : Shearing Direction
Steel Reinforced Concrete Bracket www.MidasUser.com
Crack Pattern (Disc Plot)
Fluid Dynamics Analysis CFD Models
Discretisation Scheme
Turbulence Models 2nd-order (Spatial, Temporal) (RANS, k-w, q-w) Boundary Condition Compressible Solver Symmetric (Slip) (Preconditioning) Far-field Compatible with incompressible Flow Wall, etc. Inviscid Flow Results Steady/Unsteady Flow Pressure Velocity, Vorticity Turbulent Kinetic Energy, Viscosity Aerodynamic Coefficients
Turbulence near Bridge Section www.MidasUser.com
Fatigue Analysis Methods and Parameters
S-N Method (Stress-Life) E-N Method (Strain-Life) Load / Stress History Mean Stress Corrections Stress Concentration Factor Modifying Factors
Calculation Objects Boundary Nodes Nodes of Selected Mesh Sets All (Default)
Results Cycles to Fatigue Failure Damage
S-N Curves of Fatigue Design Codes
Life Cycle Contour Plot www.MidasUser.com
Load & B.C. Loadings • • • • • • • •
Body Force Force / Moment Mass Displacement Pressure Beam Load Pre-stress Temperature
• • • • • •
Heat Generation Heat Flux Time Forcing Function Time Varying Load Ground Acceleration Response Spectrum Function Constraint based-on CSys.
Boundary Conditions • • • •
Constraint Multi-Point Constraint Contact Conditions Convection
Spatially Varying Pressure (Function Applied) www.MidasUser.com
Arbitrary Loading
FEA provides arbitrary loading function which can be applied to arbitrary locations/areas regardless of node and/or element connection.
Point Load (1D, 2D, 3D)
Rectangular Pressure (2D, 3D)
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Edge Load (1D, 2D, 3D)
Circular Pressure (2D, 3D)
New Paradigm in Advanced Structural Analysis
www.MidasUser.com
1
Overview
2
Geometry Modeling
3
Mesh Generation
4
Analysis
5
Post-processing
Post-processing Result Output Capabilities
Midas Civil
Midas FEA
Contour Plot
O
O
Table Results
O
O
Excel Compatibility
O
O
Iso Surface Plot
O*
O
On Curve Diagram
O*
O
Legend Control
O*
O
Exact Deformation Shape
X
O
Clipping Plot
X
O
Mirror Plot
X
O
Vector Plot
X
O
Result Tag
X
O
*With limitations compared to FEA
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Post-processing
Contour Plot
Works Tree
MS-Excel
Result Table
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Result Graph
Exact Deformed Shape
Deformed Contour with Original Shape (Static Analysis) www.MidasUser.com
Mode Shapes (Stability Analysis)
Iso-surface Plot
Iso-Surface in Transparent Solid Geometry Capped Plot (Lower Part)
Base Iso-surface
Capped Plot (Upper Part) Multiple Iso-surfaces www.MidasUser.com
Clipping Plot
Original Plot
Multiple Clipping Planes
von Mises stress and deformation of cable www.MidasUser.com
Mirror Plot Symmetry Plane
Mirrored Contour Plot Symmetric Model
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Mirrored Deformed Shape
Vector Plot Vector Plot Option • Head Type (Both, One, None) • Constant Head Size • Constant Body Size • Color (Contour, Mono)
Vector Plot with Deformation Vector Plot with Contour
Vector Plot with Transparent Geometry www.MidasUser.com
On-Curve Diagrams
3D On-Curve Graphs on Contour Plot
Result Data at User-Specified Sampling Points
Fault Zone
2D On-Curve Graphs on Contour Plot
Front View www.MidasUser.com
Probe & Result Tag
Sectional Result with Clipped Plot (Element Result)
Nodal Result
Probe & Add Result Tags at Specified Nodes/Elements www.MidasUser.com
Legend Control
In FEA, legend can be controlled for its position, size, format and range (including min/max value) by mouse dragging.
Drag side to resize legend box Drag scale bar to change range
Property Window (Legend Option)
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• Legend Option: - Color (Value, Ratio, Description) - Logo - Range (including Min/Max/Zero) - Format (Fixed/Scientific, Width)
User Support midas FEA On-Line System Local Support System Web Support System Consulting Training & Seminars Fast and Accurate User-oriented System Useful materials
Update News: The latest updates about the program and release notes 1:1 Consulting: 24 hr consulting support by phone or e-mail Technical Documents: Various documents and papers for civil and structural engineering Download: Program, Online-manual, Tutorials and Purchase information Q&A Board: Questions and answers for program usage Features Request: Reflect user’s requests for desired functionality in future releases Training: Schedule, Registration, Contents, On-line training movies and On-line on-demand demo/training
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MIDAS Information Technology Co., Ltd.
