HTC2012 OptiStruct Training

8/12/2019 HTC2012 OptiStruct Training

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OptiStruct WorkshopAmericas HyperWorks Technology Conference

Innovation Intelligence

arren as

May 15, 2012


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Copyright 2012 Altair Engineering, Inc. Proprietary and Confi dential. All rights reserved.

Workshop Agenda

Optimization for Noise, Vibration and Harshness (NVH) Model Updating / System Identification

Optimization with Frequency Sub-Ranges Global Search Option

E uivalent Static Load Method

Optimization of MBD Systems Optimization for Nonlinear Responses

Composites Optimization Zone vs. Ply Based Modeling

Generating Design Concepts

Ply Shape Interpretation


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Altair OptiStruct

Award-winning technology for concept design synthesis and

optimization.

At the forefront of developing new and innovative techniques.

Rapidly develop lightweight, structurally efficient designs by creatinginnovative concepts.

Powerful design fine-tuning

capabilities to further improvethe design.

Solve real world optimization

problems, efficiently!


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Optimization Solutions

OptiStruct

HyperStudy

p o n e n t L e v e

l

S y s t e m

L e v e

l

C o

Concept Design Detailed Design


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OptiStruct: An Overview

Topology

Equivalent StaticLoad Method

Coupled thermo-mechanical

Normal Modes

Linear Buckling

Static withContact

ManufacturingConstraints

S h a p e

ParallelProcessing

Direct & IterativeSolvers

AMSESAMLS Interface

Fatigue

FrequencyResponse

AcousticResponse

RandomResponse

DesignInterpretation


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Workshop Agenda





Composites Optimization Zone vs. Ply Based Modeling Generating Design Concepts



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NVH with HyperWorks

ModelManagement

Build and Assembly Full FE, CMS, etc.

Subcase Manager

SolutionSuper Elements

AMSES FRF

Transient TPA

PEAKOUT

DiagnosticsPost Proc. Toolkit Fluid Grid Particip.

DSA

OptimizationModel Updating

TPL, TPG, FRSZ SZ, SH, FRSHP

Internal Responses


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Optimization Problem Formulation

Min(max)

Min (max) with Frequency subranges

[ ]m jg

f f i xd

j

ni

,,10)(:Subject to

,...,)(max:Minimize 0K=

=

x

System Identification

m jg

T T x f

wwith

or

m jgT

T x f w

j

i

iii

j

n

i i

iii

,,10)(:Subject to

)( : Minimize

,,10)(:Subject to

)(: Minimize

1

2

K

K

=

=

=

x

x

m jg

x

j

subsubi

,,10)(:Subject to

,...,max: n m ze 21

K==

x

Curve Fitting


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Demonstration

Acoustic Cavity Model

Match a Target Curve

Optimize Acoustic Pressure Response

GSO


10/19


Workshop Agenda





Composites Optimization

Zone vs. Ply Based Modeling Generating Design Concepts



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Equivalent Static Load Method

Dealing with dynamic problems considering true time history and not

just worst case time step

Analysis

Optimization

Load

ft eq = Kd t

t

d

OptiStruct

Load time history

Equivalent static loadsDesign variables


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Demonstration 1

Topology Optimization of the Pivot Structure

Force on Tire Spindle Gravity Loading


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Demonstration 2

Analysis Type: Geometric Non-Linearity (NLGEOM)

Material: Johnson-Cook Elastic-Plastic Material

Problem Formulation: Objective Function: Minimize Volume

Design Constraints: Displacement


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Workshop Agenda









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Composite Zone Based Modeling

One Property is Required for Each Laminate Zone

Plies are not Linked across Zones

Data Duplication, No Ply Shape

No Relationship to the Manufacturing Process

Design Change Requires 3 Updates

P1 45P2 90P3 -45P4 0

Zone 1 Zone 2 Zone 3 Zone 2 Zone 1

P5 -45P6 90P7 45

Zone 1 Property Table Zone 3 Property Table

Zone 1

Ply Mat Thk Theta

P7 M1 0.01 45

P4 M1 0.01 0

P1 M1 0.01 45

Zone 2 Property Table

Ply Mat

Thk Theta

P7 M1 0.01 45

P5 M1 0.01 -45

P4 M1 0.01 0

P3 M1 0.01 -45P1 M1 0.01 45

Ply Mat Thk Theta

P7 M1 0.01 45

P6 M1 0.01 90

P5 M1 0.01 -45

P4 M1 0.01 0

P3 M1 0.01 -45

P2 M1 0.01 90

P1 M1 0.01 45

Zone 2

Zone 3


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Composite Ply Based Modeling

A Composite Part is made up of n Plies and One Laminate

No Data Duplication

Direction Relationship to the Manufacturing Process

Ply Based Modeling Process

Define Ply Shapes and Related Ply Data

Define Stacking Sequences

P1 45P2 90P3 -45P4 0

P6 90P7 45

P5 -45

Design Change Requires only 1 Update

Stack Table

Ply Mat

Thk Theta

P7 M1 0.01 45

P6 M1 0.01 90

P5 M1 0.01 -45

P4 M1 0.01 0

P3 M1 0.01 -45

P2 M1 0.01 90

P1 M1 0.01 45


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Composite Optimization Process

Phase 2

Ply Shapes

Phase 1

z

Number of Plies

Ply Bundle Sizing

Laminate Stacking

Stacking Sequence Optimization

Phase 3

Rule based

ply shuffling

0

45

-45

90

45-45

0

045-4590

90-454500

-4545

Free Sizingx

y


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Demonstration

Loading Conditions Natural frequency

Centrifugal force due to rotational speed of 7.4 RPM Gravity

Buckling

Fluid load as determined by a coupled FSI (fluid-structure interaction) analysis

Topology for Spars

Free Size on Skins


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Thank You for Your Attention!








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HTC2012 OptiStruct Training