MSC.ADAMS Flex & DurabilityMSC.ADAMS Flex & DurabilityTechnical WorkshopTechnical Workshop

Mike CollingridgeTechnical StaffMSC.Software Corp.

Agenda•Introduction•V2003 recap•V2005 highlights•Roadmap•Discussion

MSC.EASY5

MSC.ADAMS

MSC.Patran MSC.Marc

MSC.Nastran

MSC.Fatigue

Introduction

MSC.Dytran

MSC.Patran

Life/DamageCalculation

Load histories

Component Mode Synthesis

System-level Simulation

Mode shapes

Stress shapes

MSC.Nastran MSC.FatigueMSC.ADAMS

Geometry and Mesh

Introduction - Durability Process for Fatigue

Introduction - ADAMS Architecture

Horizontal Products

ADAMS/Solver

ADAMS/AutoFlex

AD

AM

S/C

ar

AD

AM

S/D

river

AD

AM

S/T

ire

ADAMS/View

AD

AM

S/E

ng

ine

AD

AM

S/R

ailADAMS/Flex ADAMS/Flex

ADAMS/Postprocessor

AD

AM

S/A

ircraft

Extends functionality of Solver and interface products

Supports all industry specific applications

ADAMS/Durability

Utilize existing FE models for modal stress recovery

• MSC.Nastran• MSC.Marc• ANSYS• ABAQUS• I-deas NX Series

Process - BuildCreate ADAMS/Flex body• Prepare FE model in MSC.Patran• Run MSC.Nastran to generate MNF• Replace rigid part with flexible body

� MNF imported automatically� Positioned automatically� Connected automatically

Simulate duty cycles• Static and quasi-static analyses• Transient and dynamic• Critical results automatically

extracted

Construct virtual test lab inputs and outputs• Import physical test data

• MTS Systems RPC® III file• nCode International DAC file

• Efficient spline interpolation• Add virtual measurements like

strain gauges

Process - Test With the ADAMS/Vibration plug-in you can perform forced-vibration

analyses to assess NVH attributes.

Process - Review� System or component animation� Animation of deformed FE mesh� Modal stress recovery� Contour plots� Vector plots� Powerful XY plotting� Hot spot tables� Report generation� Object measures� Export loads to FEA� Assess component life

Process - ImproveOptimize design• Easily exchange one flexible

body for another • Update component with local

mesh refinements• Utilize durability functions

• Maximum stress• Minimum life

• Design Study, DOE• System Optimization

You can also use ADAMS/Insight to

perform DOE studies

Recap – History12.0

� Flex• Improved control for damping thru

expression support (FXFREQ)

• Contour plots for MFORCE• Flex-body states from user-subs

• Flex-body support in C++ Solver

� Durability• FEA Modal Stress Recovery

• Stress or strain visualization

• FEA load export improvements• nCode FE-Fatigue interface

• Experimental data filtering

2003� Flex

• Faster simulations (Fortran solver)• Single precision MNF• Marker improvements (C++ solver)• Extended modeling element compatibility

(C++ Solver)• Stress modes support in I-DEAS

� Durability• Quasi-Static Stress Recovery• Stress & Life Functions• Hot Spot Report Generation• Contour probe• MSC.Fatigue Interface• Toolkit: res2dur• Improved post-processing

Recap - MSC.Nastran-ADAMS InterfaceSeamless Integration

Special Case

Control

Recap - Nastran-ADAMS Interface

MSC.Nastran msc2mnf MSC. ADAMS

MSC.ADAMS

op2 mnf

mnfx.alt

V2004 & V2005

mnf

op2

DBALL

MSC.Nastran

(optional)

V2001

BDF

BDF

xdb (optional)

Recap - Nastran-ADAMS -- Benefits• Nastran writes MNF directly• Support for SOL 103,111,112, and 106 (new)• Nastran orthonormalizes & computes invariants• Preload effects included• MNF Optimization via PLOT sets and PLOTELs• No DMAP alter required• Nastran & ADAMS can run on different platforms• Limited support for DMIGs• No superelement license required• Writes single or double precision MNFs• Support for Part SEs and residual structures• SE residual vectors (mode quality) improvements

V2005 – Improved MSC.Nastran Integration• “Rigid” MNF

� Geometry and rigid body mass properties only� Verify attachments before computing modes

� Quick exchange for system model debugging

• Stress or strain sets (shortened modes)

• XDB Support

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

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ACMS Support� Faster MNF generation with domain

decomposition (DMP support)

� MDACMS – Support for lots of MPC sets (RBE*)

AUTOMSET� Automatically resolves dependent DOF conflicts

� No more need for “UM” option on RBE3

AUTOQSET� Superelement

definition easier and less error prone

� No longer need to specify QSET or define SPOINTs

V2005 – Improved MSC.Nastran Integration

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

�

�

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V2005 – Improved MSC.Marc IntegrationMNF Generation• Directly from Marc

• Stress & Strain modes• Preloads• Mentat support

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

�

�

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V2005 – Automatic Flex Body Exchange

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

�

�

V2005 - Faster Flex Body SimulationsNew Integrator - HHT Second Order

� High-frequencies numerically damped out� Lower frequencies accurately tracked� Step size can increase to gain speed� Jacobian unconditionally stable� No problems when time step is small� Fewer number of equations� 3 to 5X speedup for Durability simulations

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

�

CPU Evals Steps CPU Evals StepsSI2 GSTIFF 7609 906021 346039 9302 1090749 350031I3 HHT 506 195722 81356 NA NA NA

Formulation IntegratorC++ Solver F77 Solver

15x faster !!

½ Suspension model on W2K

V2005 – Shortened Stress/Strain Modes• Define sub-regions in FEM (sets)• Smaller MNF• More efficient post-processing

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

��

V2005 – Improved Hot Spot Calculations

� At least 3 times faster� Output directly from ADAMS/Solver� Smaller result files (3 -18x smaller)

� Interoperability� Flexibility & Scalability� Performance� Capacity� Collaborative� Ease of Learning & Use� Customizable & Extensible

Data Backplane� Leverage Existing

Knowledge & Investments

�

FEMDATA/id, STRESS, FLEX_BODY = fbid, HOTSPOTS = n, RADIUS = r, CRITERION = c

�

Roadmap Roadmap –– ADAMS/FlexADAMS/Flex

Short Term• Generalized Modal

Damping

• Attachment Mode Support

• Contact – Phase 0

• Automatic Mode Selection

• State Dependent Modal Force

Mid Term

• Contact – Phase I

• Test Data Correlation

•MAC

•Experimental MNF

• Flex-AutoFlex Merge Phase I

Long Term

• Contact – Phase II

• Flex-AutoFlex Merge Phase II

Roadmap Roadmap –– ADAMS/DurabilityADAMS/Durability

Short Term• MSR with Nastran

Toolkit

• Improved MSC.Fatigue Integration – Phase 0

• Frequency Domain MSR

• Hotspot Improvements

• QSSR Improvements

Mid Term

• QSSR with Nastran Toolkit

• Improved MSC.Fatigue Integration – Phase I

• Frequency Based Fatigue

• Automatic (A priori) Hot Spot Selection

Long Term

• Improved MSC.Fatigue Integration – Phase II

ADAMS/Flex ADAMS/Flex –– CurrentlyCurrentlyGeneralized Modal Damping

Nastran ComponentADAMS System

[K]

[C] – proportional damping

[M]

[D]**

**Note: Planned for 2006 Release

Nastran – ADAMS Generalized Damping

DiscussionDiscussionDo you understand our direction?

Do you agree with the direction?� Are your needs being met?� What is going well?� Are there things that could be better?

What did we miss?

Thank you for participating inthe Flex-Durability roundtable

–The Solver Team