Bridging Your Innovations to Realities
Date: December 8, 2011
Topic: General Use of midas GTS (Part I)
Presenter: Abid Ali, Geotechnical Engineer
midas GTS Advanced Webinar
Bridging Your Innovations to Realities
1. Introduction
2. Geometry Modeling
3. Meshing
4. Property
Contents:
GTS
MIDAS Information Technology Co., Ltd.
Convenience
Rapidity
Accuracy
Productivity GTS !
“GTS is a total, state-of-the-art solution, which has been developed through integrating all the functions, which are required for structural analysis of geotechnical and tunnel
engineering. Its capabilities include stress analysis reflecting
construction stages, seepage analysis and much more …”
About GTS
MIDAS Information Technology Co., Ltd.
Introducing Frame Work
4 Property
Window
Task Pane
Window
Output Window
Works Tree
Window
Work Window
Table
Window
MIDAS Information Technology Co., Ltd.
Main Menu
SelectionToolbar WorkPlaneToolbar
Snap Toolbar
Tabbed Toolbar
View Toolbar
Measure Toolbar
Unit System
Standard Toolbar
Introducing Frame Work
MIDAS Information Technology Co., Ltd.
Curve Edge & Curve connecting 2 Points
Surface Face & Shell
Solid 3D element defined with Volume
Compound Group of listed elements
Types of Geometry Shape
Point Points on 2D or 3D
Explode
Generation
MIDAS Information Technology Co., Ltd.
Point
Types of Geometry Shape
+
+
+ +
+ + +
+
+
+
+
+
+
+
Imprinted Point Generated Node
in Imprinted Shape
Curve Surface Solid
Points on 2D or 3D,
The Basic Entity of all Shapes
MIDAS Information Technology Co., Ltd.
Edge: Line connecting 2 Points
Wire: Group of Continuous Edges
Face : Surface enclosed by edges/wire
Solid : Enclosed by faces, has volume
Curve
Types of Geometry Shape
Edges (Edge or Curve)
Wire (Group of Edge)
Face Solid
MIDAS Information Technology Co., Ltd.
Surface Modeling
Virtual Grid
(M X N)
Elevation
Grid Patch
Co-planar Curves
Plane Patch
Vertex Cloud
Vertex Patch
NURBS Patch
Arbitrary Curves
2~4 Curves
Coons Patch
MIDAS Information Technology Co., Ltd.
Box
Sphere
Cylinder
Torus
Cone
Wedge
Creating Point • Line • Surface • Solid
Geometry > Primitive Feature > Cylinder, Cone, Box, Wedge, Sphere, Torus
Solid
MIDAS Information Technology Co., Ltd.
Solid Modeling
Trim
Divide
Boolean Operation
A
B
Fuse (A B)
Cut (A - B)
Common (A B)
+
Divide by Multiple Surfaces (Excavation Stages)
MIDAS Information Technology Co., Ltd.
Types of Geometry Shape
Sub Shape Lower Ranked Shapes building up the Independent Shape
Shape
Sub Point
Sub Edge
Sub Wire
Sub Face
Sub Shell
8
12
6
6
1
1 Solid
Empty
MIDAS Information Technology Co., Ltd.
Types of Geometry Shape
Co-Shape Same shapes existing on the same location.
2 Faces Co-Edge Check Duplicate
Check Duplicate
Co-Face 2 Solids
MIDAS Information Technology Co., Ltd.
Merge
2 Edges 1 Edge
Advanced Geometry Work (Curve, Surface)
Merges 2 or more edges
Geometry > Curve > Merge...
Merge Edge
Sub Point Sub Point
Sub Point No Sub Point
Sub Point Sub Point
MIDAS Information Technology Co., Ltd.
Make Wire
1 Wire
3 Sub Edges
3 Edges
4 Sub Points
Advanced Geometry Work (Curve, Surface)
Groups Edges to a Wire.
Geometry > Curve > Make Wire...
Make Wire
MIDAS Information Technology Co., Ltd.
Trim Solid
Reference Point
Trim Surface
Advanced Geometry Work (Solid)
Divides Solid by Surface,
and Removes the divided Solid of Reference Point.
Geometry > Solid > Trim...
Trim Solid
MIDAS Information Technology Co., Ltd.
1 Solid
(Solid to Divide)
Tool Surface
2 Solids
Advanced Geometry Work (Solid)
Divides Solid by Surface
Geometry > Solid > Divide...,
Divide Solid
Divide
MIDAS Information Technology Co., Ltd.
2 Solid
Tool Object
Master Object
Embed
Advanced Geometry Work (Solid)
Embeds Solid into another.
Geometry > Solid > Embed...
Embed
MIDAS Information Technology Co., Ltd.
Various Geometry Tools
Solid Wire
Z-Direction
Extrude
Extracts a shape in a direction
Geometry > Generator Feature > Extrude...
Extrude
MIDAS Information Technology Co., Ltd.
Profile
Revolution Axis
(Z-Direction)
Revolve Solid
Revolve
Rotates the Revolution Profile to create Solid, Shell or Face
Geometry > Generator Feature > Revolve...
Revolve
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
2 Profile(Wire) Solid
Loft
Creates Shell or Solid by connecting the given series of Profiles.
Geometry > Generator Feature > Loft...
Loft
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
Sweep
Profile
Guide Line
Sweep Solid
Extracts selected Profile followed by the Guide Line,
and creates Face, Shell or Solid Geometry > Generator Feature > Sweep...
Sweep
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
Modification
Trim 2 Surfaces
Offset
Local Prism Profiles
Defined Depth
Through-all
Draft
Side View
Chamfer
Various Geometry Tools
Modifier Features
MIDAS Information Technology Co., Ltd.
Face
Y-Direction
Translate
(Uniform Copy)
Translates or Duplicates Elements in a Direction
Geometry > Transform > Translate...
Translate
Uniform Copy
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
Face
90°
Rotate Axis
Rotate
Rotates a Shape by the Rotate Axis
Geometry > Transform > Rotate...
Rotate
Rotate Move
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
Solid Mirror Plane
(Y-Z Plane)
Mirror Shape
Target Object
Mirror
Translates Shape by the Mirror Plane
Geometry > Transform > Mirror...
Mirror
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
Face
Scale Center Point
Scale
Changes the size of the selected shape
Geometry > Transform > Scale...
Scale
Various Geometry Tools
MIDAS Information Technology Co., Ltd.
Node Connect
Not Co-Face
Co-Face
Co-Face
Not Node Connect
Node Connect
checks duplicated shapes.
Geometry > Check > Duplicate...
Check Duplicate
Check Duplicate
MIDAS Information Technology Co., Ltd.
TGM (Terrain Geometry Maker)
Specialized Module for Real Terrain Geometry
DXF Data TGM
GTS Digital Map
MIDAS Information Technology Co., Ltd.
Data Exchange
Import (Geometry)
Export (Geometry)
• STEP, IGES, BREP, Neutral Format File
Standards for Data Exchange • STEP (STandard for the Exchange of Product Model Data)
• IGES (Initial Graphics Exchange Specification)
• STL (STereo Lithography) – De facto standard for RP
IGES Geometry
Generated Mesh
MIDAS Information Technology Co., Ltd.
GTS
FrameSolid Wizard automatically generates
Solid Geometry & Mesh by importing Frame Model
(*.MCS) from Civil and Gen.
MCS Format
Analysis Model
(3D Prism Mesh)
Generated Solid
Geometry
Frame Solid Wizard from CIVIL / Gen
MIDAS Information Technology Co., Ltd.
Mesh Generation
Auto Map Protrude Manipulation
• Solid
• Surface
• Edge
• Planar Area
• 4-Curve Area
• 2D 3D
• Quadrilateral
• Combined
• Triangle
• Solid
• Surface
• k-Curve Area
• k-Face Volume
• 4-Node Area
…
• Extrude
• Revolve
• Project
• Fill
• Sweep
• Geometry
• Element
• Node
• Create
• Extract
• Connection
• Change Para.
• Smooth
• Divide
• Check
• Quality
• Merge
• Transform
…
Object
Type
MIDAS Information Technology Co., Ltd.
Automatic Surface Meshing
Regularity
Uniformity
Boundary Sensitive
Orientation Insensitive
Sizing Control
(< 1/2)
Internal Curve/Point
Loop Mesher ✓ ✓ ✓ ✓
Delaunay Mesher ✓ ✓ ✓ ✓
Grid Mesher ✓ ✓ ✓
Loop Mesher Grid Mesher Delaunay Mesher
Impulsive Point
MIDAS Information Technology Co., Ltd.
Automatic Solid Meshing
• GTS’ Tetra Mesher auto-generates tetrahedral solid mesh with variable sizes in
smooth transition. (200,000 Tetra’s/min)
• GTS’ Tetra Mesher is capable of including holes, curves and points that are present
in/on solids.
Smooth Transition
Smooth
Transition
MIDAS Information Technology Co., Ltd.
Mapped Mesh Generation
• GTS’ Map Mesher generates structured (regular & orthogonal) mesh both in surfaces
and solids.
k-faced Volume
(Simply-closed)
k-sided Area (Simply-connected)
Abutment
(Solid Mesh) Tunnel - Junction
(Solid Mesh)
Tunnel Lining
(Surface Mesh)
MIDAS Information Technology Co., Ltd.
Size Control
• GTS provides various size control methods, uniform size, division, linear grading (size
& ratio and symmetry option) and refinement option.
Linear & Symmetric Seeding
Fine Coarse Coarse
Division Uniform
Size
Lin
ea
r Gra
din
g
Fine Mesh
Coarse Mesh
Smooth Transition
Normal Refinement (50%) Refinement (120%)
MIDAS Information Technology Co., Ltd.
Mesh Size Control
Along Edge Mesh Size Control for Edge or Sub-Edge
Along Edge
Select Edges Size Control
Mesh > Size Control > Along Edge...
MIDAS Information Technology Co., Ltd.
Mesh Size Control
Custom Size Along Edge
Seeding on the Selected Edge by Inputting the Points to be Seeded.
Input Points
Custom Size
Along Edge
Table Input Select Edge
Mesh > Size Control > Custom Size Along Edge...
MIDAS Information Technology Co., Ltd.
Mesh Size Control
Match Edge Seed duplicates the seeding information to the other edge
Generated Seeds
Source Edge
Target Edge
Match Edge Seed
Mesh > Size Control > Match Edge Seed...
MIDAS Information Technology Co., Ltd.
Auto Mesh vs Map Mesh Generation
Map Mesh K-Edge Area Creates 2D Mapped Mesh on
the selected Area
Map Mesh
Mapped Mesh Curve
Mesh > Map Mesh > K-Edge Area...
MIDAS Information Technology Co., Ltd.
Extrude
Fill
Protrude Mesh
2D Mesh Extrude Mesh(3D)
Edges Fill Mesh(2D)
MIDAS Information Technology Co., Ltd.
Revolve
Sweep
2D Mesh Revolve Mesh(3D)
2D Mesh & Guide
Line
Sweep Mesh(3D)
Protrude Mesh
MIDAS Information Technology Co., Ltd.
Project
Offset
2D Mesh Project Mesh(3D)
2D Mesh
Offset Mesh(3D)
Protrude Mesh
MIDAS Information Technology Co., Ltd.
Various Meshing Tools
Merge Mesh Set
Groups elements in sets.
Mesh Set 1
Mesh Set 2 Mesh Set 3
Mesh Set 1
Mesh Set 2 Mesh Set 3
Select
2 Mesh Set
Merge Mesh Set Context Menu
3 Mesh Set
Drag
&
Drop
MIDAS Information Technology Co., Ltd.
Mesh > Node > Merge...
Various Meshing Tools
Merge Node Merges 2 or more nodes into one.
[Selected Node]
[2 Nodes]
Node to Move
Node to Retain
Merge Node
Merge Node
MIDAS Information Technology Co., Ltd.
Mesh > Element > Extract Element...
Various Meshing Tools
Extract Element Extracts elements from higher dimension shape.
[From Shape]
2D Element 3D Element
2D Element Select Nodes 3D Element
[From Node]
Hide Mesh &
Select Sub Faces
MIDAS Information Technology Co., Ltd.
Mesh > Transform > Mirror...
Various Meshing Tools
Mirror
Mirror Mesh
Original Mesh Mirror Preview
Translates mesh by the Mirror Plane
MIDAS Information Technology Co., Ltd.
Various Meshing Tools
Scale Changes the size of the selected element.
Scale Preview Original Mesh
Mesh > Transform > Scale...
MIDAS Information Technology Co., Ltd.
Create Section Polyline, Line, Import DXF
etc.
Create Solid Extrude, Loft, Sweep, Etc.
Modify Solid Boolean Operation, Embed, Divide Etc.
Size Control Along Edge, Match Edge Seed, Custom
Edge
Generate Mesh Auto Mesh Solid, Map Mesh Solid, K-Edge area Etc
Process of GTS Modeling
Geometry Modeling
Tools Modeling Process
MIDAS Information Technology Co., Ltd.
Transform
Extract 3D Mesh
Generate 2D Mesh
Create Section Polyline, Line, Import DXF Etc.
Auto Mesh Planar Area, K-Edge Area, Auto Mesh Face
Etc.
Extrude, Fill, Sweep, Project, Offset, Revolve Etc.
Mirror, Translate, Rotate Etc.
Mesh Modeling
Process of GTS Modeling
Tools Modeling Process
MIDAS Information Technology Co., Ltd.
Check Mesh
Check Mesh 2D Checks if the meshes are well generated.
Checks if the nodes are well connected.
NG OK
Check Mesh
Mesh > Check Mesh...
MIDAS Information Technology Co., Ltd.
Check Mesh
Check Mesh 3D Checks if the meshes are well generated.
Checks if the nodes are well connected.
NG
Check Mesh
OK
Mesh > Check Mesh...
MIDAS Information Technology Co., Ltd.
• Soil Elements • Solid Element
• Plane Strain element
• Axisymmetric Element
• Structural Elements • Truss Element
• Embedded Truss Element
• Beam Element
• Plate Element
• Plane Stress Element
• Application Elements • Interface Elements
• Plate interface elements
• Pile element
• Pile tip bearing element
• Geogrid element
• Elastic link
• Rigid Link
• Spring
• Matrix spring
Element Type Provided by GTS
Line Type Truss / Embedded Truss
Beam
Tension Only (Hook), Compression
Only (Gap)
Plot Only (Dummy for Modeling)
Geogrid(1D)
Plane Type Plate (Shotcrete, Lining)
Plane Stress
Plane Strain
Axisymmetry
Geogrid(2D)
Plot Only (Dummy for Modeling)
Solid Type Solid
Others Point Spring, Matrix Spring, Interface
Elastic Link, Rigid Link
Line-to-solid interface for pile
•Sectional properties
MIDAS Information Technology Co., Ltd.
Material Models Provided by GTS
Structural Constitutive models. Non linear Elastic model for truss and embedded truss Non linear elastic model for elastic links Geomembrane models Interface models Plate Interface model Non linear Pile model
Geotechnical constitutive models
Linear elastic models Transversely isotopic model Tresca model Von Mises model Mohr-Coulomb model Drucker Prager model Duncan-Chang Model Strain softening model Modified cam clay model Jointed rock model Hoek Brown model Modified Mohr Coulomb Jardine model D-min model
Seepage constitutive model
Permeabilty function Volumetric water contents function
Linear Elastic constitutive model
Non Linear Elastic constitutive model
Elasto-plastic constitutive models
•Based on Couloumb’s law •Simulate the interface behaviour
•Pile and surrounding soils. •Retaining wall and soil •Lining and landfill •Jointed rocks and fault zones.
•Model cohesionless soils and undrained behaviour of ground soil. •Analysis of ductile materials. •Simulating anchors, nails, steel made pipe pile etc.
•Model granular materials such as soil and concrete.
•Simulate gravel behaviour. •Hyperbolic stress-strain relationship. •Controls the softening of the soil.
•Brittle failure of rocks. •Failure of a jointed rock mass in response to induced stresses.
•Simulate clay, mainly in consolidation analysis. •Simulates the behaviour of stratified and jointed rock masses. •Elastic and Plastic anisotropic behaviour. •Hardening behaviour of soil.
MIDAS Information Technology Co., Ltd.
Thank You! Thank You! For more information, please visit us at
http://en.midasuser.com
Bridging Your Innovations to Realities
GTS