Midas GTS NX Training.pdf

GTS NX Basic Training

Integrated Solver Optimized for the next generation 64-bit platform

Finite Element Solutions for Geotechnical Engineering

Geometrical Modeling in midas GTS NX

Integrated Solver Optimized for the next generation 64-bit platform

Finite Element Solutions for Geotechnical Engineering

Geometrical Modeling in midas GTS NX

Integrated Solver Optimized for the next generation 64-bit platform

Finite Element Solutions for Geotechnical Engineering

GTS NX

Objectives

 Element

definition

 Geometry  Meshing

Commands

Commands

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Integrated Solver Optimized for the next generation 64-bit platform

Finite Element Solutions for Geotechnical Engineering

Training Course

GTS NX

Surface and Solid Divide Point and Curve

Boolean

Protude

Transform

Remove

Sub Shape

Tools

Views Selection Filter Work Tree

Output Window Properties

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drawing methods (button) 

selected  wait for selection 

value input  coordinate/value input 

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select/unselect 

selection method 

selection filter 

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GTS NX Dividing Tools A Selected Surface divides the selected solids. Selected Tool Surface Select a Tool Surface (Datum Plane, Shell, Face), which will divide the solids. If the To ol Surface consists of multiple Faces, user must combine them together and select here as a single Shell.3-Pt Plane 3-Pt Plane defines an infinite plane, which will divide the selected solids. The coordinates of the 3 points may be specified using Snap. Divide Touching Faces of Neighbors When a number of solids exist in a compound and only selective solids need to be divided, the neighboring solids to the selected solids will be divided at the corresponding face as well. This is intended to ensure the connectivity of mesh at thecorresponding faces. Delete Original Shape(s) This option deletes Source Shape leaving the shapes subsequent to a division operation. Delete Tool Shape(s) This option deletes Tool Surface leaving the shapes subsequent to a division operation.

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GTS NX Select Master Object Select an object Solid. Here, the Selection Filter is fixed to Shape, and only Solid can be selected. Select Tool Object Select a solid, which will become embedded into the object solid. Here, the Selection Filter is fixed to Shape, and only Solid can be selected. Delete Original Shape(s) Delete the Original Shapes of Master Object and leave only the shape subsequent to an Embed operation.

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Meshing in midas GTS NX

Integrated Solver Optimized for the next generation 64-bit platform

Finite Element Solutions for Geotechnical Engineering

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GTS NX

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GTS NX

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GTS NX

Integrated Solver Optimized for the next generation 64-bit platform

Finite Element Solutions for Geotechnical Engineering

Training Course

GTS NX

Training Course

GTS NX

Training Course 4

GTS NX

Geometry > Divide > Solid

3. Delete the top half of the box by selecting on the screen and pressing DELETE

Divide the solid 1. Select box as target solid 2. Select grid face as tool surface

5 Geometry > Protrude > Extrude

Create 2 solids from existing profiles Selection filter ‘’FACE’’

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Extrude a new edge to further shape of the tunnel exit

Geometry > Protrude > Extrude (Profile: 3 top Edges of Left Bottom) Filter: EDGE

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Solid divided in 2 halves

Geometry > Divide > Solid

Top and bottom halves

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Extrude the 2D tunnel profiles to create the tunnel tubes

Geometry > Protrude > Extrude (Profile: 4 tunnel surfaces) Filter: FACE

Target Objects: 4 tunnel surfaces from works tree

Y - Axis

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Divide the 2 exits and ground by the 4 tunnel tubes Geometry > Divide > Solid (Target Solids: 1 ground, 2 Exits) Tools: 42 tunnel tubes surfaces Select the 4 tunnel solid extrusions to get all the 42 surfaces

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Move work plane to create 2D rectangle

Geometry > Move Work Plane > Three Point Reference

Point 1

- Select 3 corner points on the back face of the ground

Point 2

Point 3

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Geometry > Point & Curve > Rectangle

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Y - Axis

Method: Copy Distance: -10 Times: 5

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Geometry > Divide > Solid

Target Solids : 4 tunnel tube solids Tools: 6 rectangle surfaces Divide touching faces: ground

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Tools > Geometry > Random Color

Mesh > Size Control > Edge > Interval Length

Mesh > Size Control > Edge > Linear Grading

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Mesh > Material > Create > Isotropic

Material 1: Concrete -Model Type : Elastic Material 2: Ground -Model Type : Mohr - Coulomb

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Mesh > Property > Create > 3D

Name: Concrete -Material : Concrete Name: Ground -Material : Ground

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Mesh > Generate > 3D > Auto-Solid

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Mesh > Element > Parameters > 3D

Change the material property for the 2 exit structures - Select both mesh sets from the works tree

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Works Tree > Model > Properties

Change the name of the mesh sets for the 2 exits and the ground. Double click on mesh set and in property window assign names

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Static / Slope Analysis > Load > Self Weight

Define Gravity in the Negative Z direction

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Static / Slope Analysis > Boundary > Constraint > Auto

Apply Auto boundary conditions

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Analysis > Analysis Case > General

Name: Linear Static Solution Type : Linear Static - Press >> to activate all sets - Click Apply

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Analysis > Analysis Case > General

Name: Linear Static After Excavation Solution Type : Linear Static - Drag and drop the mesh sets to only have the ground and tunnel exits active

Press Output Control -Activate Strain Results

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Analysis > Analysis > Perform

Select both Cases and click OK

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Works Tree > Results

Click on Linear Static > Displacements > TX Translation - This activates movements in the X direction

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Works Tree > Results

Click on Linear Static > Solid Stresses> S –  Principal A -This activates the major principal stresses

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Works Tree > Results

Click on Linear Static After Excavation > Solid Strains > E –  Max Shear -This activates the maximum shear strains

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