dm-intro 16.0 l03 basics of designmodeler

1 2015 ANSYS, Inc. March 2, 2015

16.0 Release

Lecture 3:

Basics of ANSYS DesignModeler

Introduction to ANSYS DesignModeler


Overview

In this lecture we will learn about: Pre-processing Workflow using ANSYS WB tools What is ANSYS DesignModeler DesignModeler Interface Concept of Planes and Sketches Sketching Interface Sketching Toolboxes


Preprocessing Workflow

Sketches and Planes

Geometry Import Options

3D Operations

Bi-Directional

CAD/ Neutral

Geometry Cleanup and Repair

Automatic

Cleanup

Simplification,

Mid-surface,

Fluid Extraction

Extrude, Revolve,

Sweep, etc

3D Operations

Booleans,

Decompose, etc.

Import/ Geometry Creation

Geometry Modifications

Meshing Solver

Meshing Methods

Hybrid Mesh: Tet,

Prisms, Pyramids

Hexa Dominant,

Sweep meshing

Global Mesh Settings

Local Mesh Settings

Sizing, Controls,

etc.

Assembly

Meshing


Overview

DesignModeler is a tool For importing CAD models for pre-

processing before engineering analysis

For geometry simplification/modification and preparation for meshing

For parametric feature-based modeling

Application Fundamentals

Two basic modes of operation for geometry creation

2D Sketching

3D Modeling (Surfaces and Solids)

Dedicated tools for import & clean-up

What is DesignModeler?

Sketching Modeling

CAD Import & Clean-up


Launching DesignModeler

From Component Systems

Eg: Geometry, Mesh

From Analysis Systems

Eg: Fluid Flow (Fluent), Fluid Flow (CFX)

ANSYS DesignModeler is launched within Workbench Double click Geometry in the System or right click and select Edit


Toolbars

Tree Outline

Mode Tabs

Details View

Status/Info Bar

Graphics Window

Entity Details Bar Units Display Bar

DesignModeler Interface


DesignModeler is a History based modeling tool

Tree Outline is where are being displayed the recorded sequential feature operations

Starts with three default Planes

XY, ZX & YZ

Sketches are created on Planes

Modeling Operations are listed sequentially, which can be edited/deleted

The Bodies/Parts which are created by the Modeling Operations are listed beneath them

This list of Bodies/Parts is not feature based Changes can only be made based on Feature

operations in the Tree Outline

Changes by Part Management operations such as Form a New Part

Tree Outline

Default Planes

Sequential list of Modeling

Operations

List of bodies/parts

engrsHighlight


Working with the Details View

Feature inputs are listed in the Details View The second column contains user input

values or selections

Each input box is activated by Left Click Boxes requiring entity selection (Sketch,

Geometry etc) will display Apply/Cancel when activated

Yellow boxes indicate that input is required (numeric or selection input).

Details View


Status/Info Bar

- Displays Status of geometry model

- Displays dynamic instructions

- Eg:

Entity Details Bar

- Displays details of entity selected in Graphics

Window or Tree Outline.

- Eg:

Units Display Bar

- Displays Unit used in

current project

Info Bars

10 2015 ANSYS, Inc. March 2, 2015

Toolbars can be accessed to get quick access to most commonly used features

The most commonly used toolbars are

Selection

View Controls

Display Controls

Toolbars can also be customized to Add/Remove features of users choice

Toolbars

Box Selection Options Criteria based Coloring for Diagnostics/Visualization

11 2015 ANSYS, Inc. March 2, 2015

Preprocessing Workflow

Sketches and Planes

Geometry Import Options

3D Operations

Bi-Directional

CAD/ Neutral

Geometry Cleanup and Repair

Automatic

Cleanup

Simplification,

Mid-surface,

Fluid Extraction

Extrude, Revolve,

Sweep, etc

3D Operations

Booleans,

Decompose, etc.

Import/ Geometry Creation

Geometry Modifications

Meshing Solver

Meshing Methods

Hybrid Mesh: Tet,

Prisms, Pyramids

Hexa Dominant,

Sweep meshing

Global Mesh Settings

Local Mesh Settings

Sizing, Controls,

etc.

Assembly

Meshing

12 2015 ANSYS, Inc. March 2, 2015

A plane is required to create a 2D sketch

Also required for some body operations 2D/3D geometry can be constructed using

a sketch as a base object

Steps for creating a 3D geometry (bottom-up approach)

Create or select an existing plane Create a sketch on the plane Apply a modeling operation to the sketch

Concept of Planes and Sketches

Desired plane is selected Sketch created on selected plane

3D geometry created using Extrude feature from the

sketch

13 2015 ANSYS, Inc. March 2, 2015

Working with Planes

At start-up, three default planes are available (XY, ZX & YZ) on which sketches can be created

New planes can be created to host sketches elsewhere

New Plane

This option can be used for creating a new plane

Suitable options for creating planes can be chosen from list of options available under Type

For example, by transforming (offset, rotate, etc.) an existing plane OR from a selected face

Optionally apply one or more transformations

Planes

14 2015 ANSYS, Inc. March 2, 2015

New Sketch

This option can be used to create a new sketch on active/selected plane

New sketches are placed in the Tree Outline beneath their associated plane

Sketches can be created in Sketching mode only

Selecting a Plane with no sketches and entering sketch mode automatically creates a New sketch

Multiple sketches can be created in any given plane

Clicking on Sketching mode tab will take you to the active sketch

Sketch Creation

XYPlane is active

Only sketches on active Plane are displayed in drop down

15 2015 ANSYS, Inc. March 2, 2015

Sketching Interface

Sketching tools are arranged in five

toolboxes - Draw, Modify, Dimensions,

Constraints and Settings

Sketching toolboxes are available when you switch to sketching mode

Details of the current sketch (Dimensions, Constraints etc) are displayed in the Details View.

16 2015 ANSYS, Inc. March 2, 2015

Many options are straight forward to use GUI status bar provides instructions for completing each operation Right click provides additional commands

Draw Toolbox

Open End

Closed End

Open End with Fit Points

Closed End with Fit Points

17 2015 ANSYS, Inc. March 2, 2015

Modify Toolbox

L1 L3

L2

L4

Fillet( L1, L2) Corner( L1, L4)

Trim( L3)

Chamfer( L2, L3)

Extend( L4, L3)

Modify Toolbox can be used to Add/Edit/Remove things in the existing sketch such as trimming sketch, adding chamfers, splitting edges, etc.

18 2015 ANSYS, Inc. March 2, 2015

A new sketch can be created by referencing existing geometry

Allows selected boundaries of plane to be duplicated as new sketch entities

All sketches have to be in the same plane

Modify Toolbox

Select Required Edges

Duplicate to Sketch

Create Plane From Face

19 2015 ANSYS, Inc. March 2, 2015

Used for defining dimensions of a sketch User can pick any specific dimensioning tool OR can use General or

Semi-Automatic

General General selects appropriate dimension type based on entity

selection

Right click provide quick access to specific dimension types

Semi-Automatic Cycles through entities until sketch is fully constrained (or) user

chooses to exit

Dimensions Toolbox

20 2015 ANSYS, Inc. March 2, 2015

Constraints can be applied on sketch entities for other than Dimensional restrictions

These are applied Manually

Constraints can be added or deleted manually on existing sketch entities

Automatically (Auto Constraints is ON by default)

Auto Constraints displays possible constraints on the fly while drawing sketches. Some examples:

Constraints Toolbox

Horizontal

Vertical Point Coincident

Horizontal

Vertical Horizontal

21 2015 ANSYS, Inc. March 2, 2015

Color Coding Indicates constraint status

Teal: Under-constrained

Blue: Well Defined

Black: Fixed

Red: Over-Constrained

Gray: Inconsistent or Unknown

Constraints Toolbox

Teal Blue

Blue

Black

Red

Warning on Over-constraining

22 2015 ANSYS, Inc. March 2, 2015

Ruler allows to get a quick sense of scale while sketching

Look At tool will orient the display perpendicular to a plane, sketch or selected entity normal.

Many operations become easier via a right click context menu on the graphics screen

Undo/Redo buttons are available in Sketching mode only

IMPORTANT: Each plane stores its own Undo Stack

The Back operation (available via RMB) acts like a micro undo during multi-step sketching operations (e.g. polyline)

Sketching Tips

Context Menu

Please Note: Only one sketch is active at a time!

23 2015 ANSYS, Inc. March 2, 2015

Sketch Instancing

Allows copies of sketches to be added in other planes

Sketch is persistent

Gets automatically updated when changes in base sketch are made

Edges are fixed

Can not be moved, edited, or deleted

Can be scaled and rotated

Can only be placed in planes lower in the tree outline than the plane with the base sketch

Sketch Projection Can be used for projecting 3D entity onto a plane to

create new sketch entities

Remain associated to input geometry

Advanced Sketching Options

Sketch projected onto existing plane

3D Geometry selected for projection

24 2015 ANSYS, Inc. March 2, 2015

Summary

What have we learnt in this session? What is the normal Pre-processing Workflow within ANSYS WB tools? Where is DesignModeler used in Pre-processing process? What is the concept of Planes and Sketches? How to use Sketching Mode for creating sketches? How to constrain sketches?

25 2015 ANSYS, Inc. March 2, 2015

Workshop 3.1 DesignModeler Basics

26 2015 ANSYS, Inc. March 2, 2015

Workshop 3.2 Sketching

dm-intro 16.0 l03 basics of designmodeler

Documents