dx 14.5 l01 introduction to dx

8/19/2019 DX 14.5 L01 Introduction to DX

1/31

© 2013 ANSYS, Inc. September 27, 20131 Release 14.5

14. 5 Release

Introduction to ANSYS

DesignXplorer

Overview


2/31


• DesignXplorer (DX) is a tool that uses response surfaces and direct optimization to

efficiently explore the solution space. – Explore and understand the performance at other design or operating conditions

– Find the conditions which give the best performance

– Determine the key parameters influencing the design

– Explore the robustness of the design

Single Point What If?ResponseSurface

?

?

?

What is DesignXplorer?


3/31


DX Features

List of DX Features (discussed on following slides and lectures)

–

‘What if’ Study [does not require a DX license] – Parameter Correlation

– Design of Experiments

– Response Surface

– Min/max search

– Surface/XY plots

– Sensitivities

– Direct and response surface Optimization and trade-off plots

– Robustness of design

– Six Sigma Robustness Evaluation


4/31


DX FeaturesWhat if’ Study

Automatically run through a list of manually specified design points[does not require a DX license]


5/31


DX FeaturesParameter Correlation

1. Identify unimportant parameters

Output Parameter

Input Parameter

Output parameters not sensitive

to force variations


6/31


DX FeaturesParameter Correlation

2. Identify the degree to which the relationship is linear/quadratic


7/31© 2013 ANSYS, Inc. September 27, 20137 Release 14.5

DX FeaturesDesign of Experiments

• Specify the DOE Type

• Specify the range for each

parameter

• DX uses a DOE to select design

points with parametercombinations intended to explore

the solution space efficiently

– works best for fewer than 20parameters



DX FeaturesResponse Surface

• A continuous response surface is formed from the DPs – Various formulations available

• A response surface can be quickly explored by other DX features …

Parameter 1

Curve fit

responseDesign

Points



DX FeaturesResponse Surface

– Min/max search

– Surface/XY plots

– Sensitivities;

– Optimization and trade-off

plots

– Robustness of design



DX FeaturesSix Sigma Robustness Evaluation

Input parameters vary!

Output parameters

Understand how

your performance

wi l l vary w i th your

design tolerances

Determ ine how

many parts w i l l

l ikely fai l

Understand

which inputs

require the

greatest con tro l


11/31


DXSmall effort/cost, huge benefits.

Understanding Innovation ROI


12/31


14. 5 Release

Introduction to ANSYS

DesignXplorer

Interface


13/31


General Workflow


14/31


• Workbench Applications that allow for parameterization:

– External CAD package

– Engineering data

– DesignModeler

– Meshing

– Mechanical

– Mechanical APDL

– ExplicitSTR

– CFX

– Fluent

– CFD-Post

– VistaTF

– Polyflow

– SpaceClaim

– External Connections

– Excel

– AQWA

– nCode

– Ansoft Solutions (HFSS, Maxwell)

Parameters


15/31


• In Workbench Options > Geometry Import, enable Parameters and

specify a filtering prefix and suffix

• The default filterer is “DS”. • Example:

– To expose a CAD parameter named “Length” in Workbench, it could be renamed as

“dslength”, Lengthds”, “ds_Length”, “Length_ds”, etc. (the order is arbitrary as is

the underscore and the case).

–Leaving the filter blank will cause all CAD parameters to be passed toWorkbench.

ParametersParameterizing CAD dimensions


16/31


Input parameter created from an

expression in ANSYS CFX

Output parameters c reated f rom

an expressio n in ANSYS CFD

Post

Parameter definit io n

based on ANSYS

Mechanical APDL

input f i les

Input parameter created from an

expression in ANSYS FLUENT

Input and o utput parameters created in CAD,

DM, AMP, Mechanic al

ParametersParameterizing WB dimensions, BCs, etc.


17/31


ParametersDerived Parameters

• Derived Parameters:

– Parameters created using analytical expressions composed of input and output parameters.

– Derived parameters can be defined using various built in arithmetic, trigonometric and

statistical functions.

– Examples include (but are not limited to):

• cost function (i.e., the product of mass and cost per mass)

• normalized stress (i.e., stress response divided by an applied stress)

• Mesh sizing (setting a mesh parameter as a function of a geometric parameter)


18/31


All input and ou tput parameters

Propert ies of

selected parameter

Table of Design Points

[discussed on following slides]

Charts

[discussed on following slides]

Chart opt ions

Create derived

Parameter

Parameter Set


19/31


Update Al l Design Points

RMB > Upd ate Selected Design Points

Parameter sett ings

current ly loaded in

appl icat ions

Select Expo rt to retain

f i les associated with the

Design Point

Status bar gives m ore info

about design po ints update.

Parameter SetTable of Design Points (“What-If” Study)


20/31


• Parameters Charts allow users to

configure and plot Input vs. Output

in XY plots.

• Show how output parameters vary for

design point combinations.

B A D

G O O D

P r e s s ur eDr o p

F l o w

U n i f o r m i t y

G o o d

B a d

• show the chart output

vs. input parameter.

Parameter SetCharts


21/31


1

2

3

DX layout is very similar to Parameter Set

DXParameter Correlation


22/31


Charts

1

2

3

DXDesign of Experiments


23/31


DXResponse Surface

1

2

3


24/31


DXResponse Surface Optimization

1

2

3

4


25/31


•A Direct Optimization system is asingle-component system that utilizes

real solves.

• Is not dependent on the quality of a

response surface.

• Retrieve information via data linksfrom other components that contain

design point data, thus reducing thetime needed for the optimization

without altering the original source of

the design points.• To add a Direct Optimization system to

your project, drag it from the Design

Exploration section of the Workbench

Toolbox and drop it on your Project

Schematic.

DXDirect Optimization


26/31


1

2

3

DXSix Sigma Analysis


27/31


Unified Reporting

•DX Systems contribute to the unified report

• Includes all DX tables and Charts


28/31


• View > Reset Window Layout

– The window types are connected between the various WorkbenchNative applications. If you close the chart on one, it is closed on the

others. Use View > Reset window Layout if you get stuck

Reset Windows Layout


29/31


Summary

• DX provides plenty of functionality to allow you to gain a deeper

understanding of your problem

• Each tool within DX has a user interface that follows a common

methodical workflow


30/31


Workshop 1

Excel will receive two inputs from Workbench (must be between 0 and 100) and

calculate the value of two output parameters according to the following

equations:

• Out_1 = -2*(in_1/100-0.5)̂ 3+SIN(2*PI()*in_2/100)

• Out_2 = (in_1/100-0.5)^2+(in_2/100-0.5)̂ 2

Plotting Out_1 in Excel produce the following charts. Notice that the maximum

value of out_1 occurs at approximately (in_1,in_2)=(0, 25)

0

10

20

30

40

50

60

70

80

90

100

0 1 0

2 0

3 0

4 0

5 0

6 0

7 0

8 0

9 0

1 0 0

I n p u t 2

Input 1

Output 1

1-1.5

0.5-1

0-0.5

-0.5-0

-1--0.5

-1.5--1

0

34

68

-1.5

-1

-0.5

0

0.5

1

1.5

0

1 3

2 6

3 9

5 2

6 5

7 8

9 1

Input 1

Output 1

1-1.5

0.5-1

0-0.5

-0.5-0

-1--0.5

-1.5--1


31/31

© b31 l

Workshop 1

Plotting Out_2 in Excel produce the following charts. Notice that the

maximum value of out_2 occurs at approximately (in_1,in_2)=(50, 50)Since there is no set of input parameters that delivers the maximum values

of both out_1 and out_2, a tradeoff analysis will need to be conducted

when finding the optimal conditions

0

9

18

27

36

45

54

63

72

81

90

99

0 1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

I n p u t 2

Input 1

Output 2

0.4-0.5

0.3-0.4

0.2-0.3

0.1-0.2

0-0.1

0

34

68

0

0.1

0.2

0.3

0.4

0.5

0

1 2

2 4

3 6

4 8

6 0

7 2

8 4

9 6

Input 1

Output 2

0.4-0.5

0.3-0.4

0.2-0.3

0.1-0.2

0-0.1

dx 14.5 l01 introduction to dx

Documents