Post on 16-Apr-2020
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
© Siemens AG 2012. All Rights Reserved.
NX NastranAn Introduction
Smarter Decisions,
Better Products
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Product Development Challenges
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Product Development Challenges
Problems Found Too Late
Lost Revenue
Concept
Design &
Engineering
Validation &
Testing ManufacturingLaunch
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Product Development Challenges
Quality vs. Cost and Performance Trade-offs
▪ Difficult to understand trade-
offs through physical testing
▪ Physical testing too
costly and impractical
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Product Development Challenges
Choosing the Right Simulation Tools
Considerations when selecting
an analysis solver:
▪ Capabilities & applications
▪ Performance & scalability
▪ Flexibility & integration
▪ Cost & support
▪ Reputation & trust
Best-in-class increasing use of simulation
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Why Siemens?
A Heritage of Leading CAE Solutions
Nastran
NX CAE
NX Nastran
Teamcenter Simulation
Process Management
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
▪ Variational equations
▪ 1st Virtual commissioning
▪ 1st Modal analysis package
▪ 1st Graphical FE package
▪ Relational engineering database
▪ 1st NURBS solid modeler
▪ Automatic mesh generation
▪ 1st Commercial enterprise data management system
▪ I-DEAS Master Series introduced
▪ 1st Robotic management
1967
1980
1990
2000
2010
▪ Topology optimization
▪ Fluid domain wrapping
Why Siemens?
Over 40 Years of CAE Excellence
▪ DMP for flow simulation
▪ Link simulation results to product requirements
▪ Multi-CAD, multi-CAE foundation
▪ Nonlinear solutions
▪ 1st Drag & drop processes
▪ Data management extensions
▪ Glue connections
▪ Simulation data management
▪ Synchronous Technology
▪ Bi-directional interoperability
▪ NX Nastran introduced
▪ NX Advanced Simulation introduced
▪ 1st Production quality 3D batch mesher
▪ Multi-physics solvers
▪ Rotor dynamics
▪ Flexible bodies in motion simulation
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Multiple Solution Domains – One Solver
Linear
Stress
Modal Buckling Dynamics
Nonlinear
Analysis
Aeroelasticity Laminate
Composites
NVH Optimization
Rotor Dynamics Parallel
Processing
Thermal
Custom
Solutions
Multi-
physics
NASTRAN
YY- Stress PSD
RMS=19.7 MPa
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Case Study
Daimler
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Siemens PLM Software
Linear Analysis
Analysis types:
▪ Static
▪ Transient
▪ Buckling
Connectivity modeling
▪ Contact
▪ Glue connections
▪ Bolt preload connections
Loads
▪ Mechanical
▪ Thermal
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Case Study
MT-Propeller Entwicklung GmbH
Challenge:
▪ Retain process edge throughout product
development
▪ Increase production efficiency
▪ Reduce the number of prototypes and physical tests
▪ Secure the company’s competitive advantage
Solution:
▪ Leverage finite element analysis for materials testing
using NX Nastran
Results:
▪ Reduced number of tests and prototypes
▪ Compressed production times
▪ Pushed back material boundaries
▪ Improved manufacturability
▪ Increased sales/growth
“Based on our finite element
analysis (technology), we were
able to reduce stress by a third.”
Martin Albrecht
CEO
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Siemens PLM Software
Complete non-linear capabilities
▪ Large deflection
▪ Contact surfaces
▪ Material nonlinearity
▪ Static and dynamic solutions
▪ Implicit and explicit solutions
Materials
▪ Linear
▪ Elastic-plastic
▪ Hyper-elastic
▪ Gasket materials
▪ Shape memory alloys
Implementation
▪ Uses NX Nastran input and output formats
0
5000
10000
15000
20000
25000
30000
35000
40000
0 50 100 150 200 250 300
Displacement (mm)
Fo
rce
(N
)
Nonlinear Analysis
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Nonlinear Analysis Example
Thermal Camera Drop Simulation - FE Model
Components
▪ Case (blue)– polycarbonate material
modeled as elastic-plastic
▪ PCB (green) – epoxy material modeled as
linear material
▪ Electronic chips (red) – nominal material
Connections
▪ Rigid elements connect PCB to case
▪ Glue connects chips to PCB
Solution 601, 129
Model Size
▪ 52,000 nodes
▪ 50,000 elements
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Nonlinear Analysis Example
Thermal Camera Drop Simulation - Results
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Nonlinear Analysis Example
Thermal Camera Drop Simulation - Results
Stress on case at contact
▪ Max Von Mises:
▪ Corner of camera screen
▪ 70 MPa at .0017 sec
VM Stress at .0017 sec
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Case Study
Eucentre
Challenge:
▪ Solve complex seismic engineering and nonlinear
dynamics problems in civil, mechanical, plant and
industrial engineering
Solution:
▪ NX and Femap for modeling, NX Nastran for numerical
model validation
▪ Extensive number of solving algorithms offering a high
degree of freedom to set parameters with Nastran
Results:
▪ Nonlinear dynamic analysis on steel structures with
accurate and reliable results
▪ Validation of numerical models through comparison
with experimental data and specific software
▪ Greater analyst creativity/innovation
▪ Identification of significant future opportunities
“Nonlinear dynamics is a core
feature of NX Nastran, it has
helped us fill a gap in civil
and structural engineering.”
Roberto Nascimbene
PhD Structural Analysis Sector Cor.
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Dynamics Analysis
Wide range of dynamic solutions
▪ Linear modal dynamics
▪ Linear direct dynamics
▪ Transient, frequency, PSD, shock
▪ Non-linear dynamics
▪ Rotor dynamics
▪ Interior acoustics
Benefits
▪ Evaluate the effects of vibrations
▪ Input into other types of analyses, such as
motion analysis for flexible bodies
Signature strength of NX Nastran
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Dynamic Analysis
Breadth of Solution
▪ Broad range of forced response
dynamic analysis types
▪ Leading modal solver
▪ Numerous damping models
▪ Numerous dynamic loadings
Capability NX Nastran
Forced Response Analysis Types
Modal Transient l
Modal Frequency l
Direct Transient l
Direct Frequency l
Complex Modal Frequency l
Random PSD l
Shock Response l
DDAM l
FRF/Transmissibility l
Rotor Dynamics Frequency l
Rotor Dynamics Transient l
Non-linear Transient l
Loading Types
Concentrated Force l
Distributed Force l
Base Motion (Accel, Vel, Disp Input) l
Damping
Modal l
Physical Viscous l
Physical Structural l
Uncoupled Physical Damping l
Coupled Physical Damping l
Frequency Dependent Stiffness and Damping l
Response Output
Standard Disp, Vel, Acce, Stress, Strain, Force .. l
Cross Spectral Density for PSD l
Crossing Rates for PSD l
Other
System Analysis with Superelements l
Transfer Function Boundary Conditions l
Mode Acceleration / Residual Vectors l
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Rotor Dynamics
Description
▪ Modes of rotating systems are different than
stationary systems
▪ Solution options
▪ Modal analysis - predict whirl frequencies and critical
speeds
▪ Frequency analysis – predict steady state response to loads
▪ Transient analysis – predict response in ramp-up to
operating conditions
Benefits
▪ Easily analyze dynamics of rotating system
▪ Applications: Wind turbines, propellers, engines,
generators, machines
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Optimization
Benefits
▪ Automates the iterative process of
changing variables and resolving
▪ Use for weight or stress reductions
▪ Shape optimization for products with
packaging constraints
▪ Multidisciplinary tradeoff studies
Analysis types supported:
Initial design:
Max stress = 14 MPa
Optimized design:
Max stress = 4 MPaBasic Analysis ▪ Linear statics analysis
▪ Normal modes analysis
▪ Buckling analysis
Dynamic Response ▪ Modal frequency response
▪ Direct frequency response
▪ Modal transient response
▪ Direct complex eigenvalue analysis
▪ Modal complex eigenvalue analysis
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Computational Performance and
Numerical Accuracy
Objective
▪ Solve large, detailed models in time to
impact the product development process
Capabilities
▪ Direct solver
▪ Iterative solver
▪ Parallel processing
▪ Shared memory (SMP)
▪ Distributed memory (DMP)
Benefits
▪ High fidelity models
▪ More “what-if” analyses and design studies
▪ Unlimited CPUs with a single DMP license
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Siemens PLM Software
Challenges:
▪ Make sure sensitive equipment can withstand
launch vibration loads without failure.
Keys to success:
▪ Use NX Nastran
Results:
▪ Effective collaboration with partners through wide
use of NX Nastran in industry
▪ Accurately predict launch environment and
component stress levels.
Case Study
Space Research Centre – University of Leicester
“We find [NX Nastran] are
particularly effective at providing
good correlation to the actual
design environments.”
Piyal Samara-Ratna
Mechanical Engineer
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Iterative Solver
▪ Effective for models with many 3D solid
parabolic elements
▪ Can be used for nonlinear problems,
including contact analysis
Benefits
▪ 4x – 10x solution time improvement
over sparse solver
1,100,000 DOF
0
20
40
60
80
100
120
140
Sparse Iterative
Ela
ps
ed
Tim
e (
min
)
Solution Time
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Parallel Processing with SMP
Shared Memory Parallel (SMP)
▪ Parallelization for common math operations
– matrix multiples, factorization
▪ Part of basic license and works in all NX
Nastran solutions
Benefits
▪ Leverage multiple processors to reduce
solution run times
Applications
▪ All models
▪ Any hardware with multiple processors
and/or multi-core processors
Example: Acoustics solution
SOL 108 – Direct frequency response
Tetrahedron- Model :
Number of Grid Points: 97378
Hardware:
Intel Xeon E5-2689 2.7GHZ processor
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Parallel Processing with DMP
Distributed memory parallel (DMP)
▪ Model divided into domains physical
▪ Geometric, frequency, both
Advantages
▪ Reduced elapsed execution time
▪ Smaller resource requirements
▪ Greater scalability than SMP
Engineering problems
▪ Very large finite element model
▪ Very wide frequency range of interest
Hardware environment
▪ Clusters of workstations
▪ Multiprocessors with multiple I/O channels
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
DMP Implementations for Modal Solutions
Geometric Domain Partitioning (GDModes)
▪ Subdivide geometry into partitions
Frequency Domain Partitioning (FDModes)
▪ Subdivide into frequency segments
▪ Computations in the frequency partitions
independent of each other
Hierarchic Domain Partitioning (HDModes)
▪ Simultaneous application of GDModes and
FDModes with hierarchic implementation
Recursive Domain Partitioning (RDModes)
▪ Recursive partitions the system matrices into
multilevel substructures
▪ Unlike other methods, eigen solution has some
approximation because of substrucuture reductions
.
KKKKKKK
KKKK
KKK
KKK
KKKK
KKK
KKK
K
tt,
to,
to,
to,
to,
to,
to
,tttt
,to
,to
,ot
,otoo
,ot
,otoo
,tttttoto
,ot
,otoo
,ot
,otoo
=
7767574737271
7666564
75655
74644
7332313
72322
71311
Frequency response function
1.0E+00
1.0E+05
1.0E+01
1.0E+02
1.0E+03
1.0E+04
100 10000 1000
-360
0
-180
Frequency (Hz)2 :41904Y- 41904Y- 4
CrankshaftCrankshaft - Suspended
13 :41904Y+ 41904Y+ 2
Analysis
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
DMP Scalability
Use high number of CPUs and still
increase solution performance
▪ Maximize utilization of cluster
▪ Reduce run times
▪ Solve larger models
NX Nastran focus on scalability
▪ Significant increases in scalability
between V1 and current V8
▪ Achieved by implementing improved
algorithms
▪ Latest improvement is RDModes
0
100
200
300
400
500
600
NXN 1 NXN 3 NXN 6 NXN 8
Number of Processors
GDModes
FDModes
HDModes
RDModes
RDModes
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
RDModes Performance Example
Auto Body Model
Model
▪ 1.3M grid points
▪ 1.2M elements
▪ 6.5M degrees of freedom
Solution Settings
▪ Modes 0 – 300 Hz (about 1000 modes)
▪ Full eigenvalue recovery
▪ NREC = 512
▪ RDSCALE = 2.0
Cluster System
▪ Siemens HP cluster
▪ Linux OS - 64 CPUs
▪ UC Berkeley cluster
▪ 900 CPUs
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
RDModes Performance Example
Auto Body Model
CPU time savings using more processors
Runs performed on UC Berkeley Cluster
0.0
20.0
40.0
60.0
80.0
100.0
120.0
1(Lanczos)
1(RDModes)
2 4 8 16 32 64 128
1.04.0
7.8
29.3
49.2
77.5
96.5
104.1 105.9
Speed Up
Number of Processors
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
0.00
2.00
4.00
6.00
8.00
10.00
12.00
0 - 100 0 - 200 0 - 300 0 - 400 0 - 500
1.00 1.08 1.21 1.34 1.551.00
2.41
4.67
7.44
10.93
Frequency Range (Hz)
Solution Time(Normalized)
Number of Modes(Normalized)
RDModes Performance Example
Auto Body Model
Computational cost for solving for more modes
Runs performed on Siemens HP Cluster using 64 processors
Solving for more modes
only marginally adds to
computational cost.
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Case Study
Damping Technologies Inc.
Challenges:
▪ Accelerate the pace of R&D
▪ Quickly design application-specific damping
solutions
Keys to success:
▪ Upgrade to NX Nastran
▪ Faster hardware
▪ Good software support from FEA distributor and
Siemens
Results:
▪ Complex dynamic analyses now take about 1⁄4 as
long as previously
▪ Faster analysis throughput
▪ New knowledge leads to damping innovations
“NX Nastran was faster
but it also came with the
best support.”
Kristopher Notestine
Manager, R&D
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Ease of Modeling and Engineering Workflow
Objective
▪ Simplify FEA model creation
Capabilities
▪ Connection modeling
▪ Superelements
Benefits
▪ Build NX Nastran models faster
▪ Reduce modeling errors
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Connection Modeling
Objective
▪ Robust, accurate solutions for
connecting incompatible meshes
Capabilities
▪ Linear contact
▪ Glue connections
▪ Bolted joints
▪ Welds and fasteners
Benefits
▪ Reduced modeling time
▪ Supports system modeling
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Linear Contact
Description
▪ Surface-to-surface contact in linear statics
solution (SOL 101)
▪ Shell and solid element faces
▪ Contact between non-compatible mesh faces
▪ Friction effects
▪ Included in NX Nastran Basic package
▪ Static subcases in dynamic solutions
Benefit
▪ Fast, accurate contact solution for simulations
that are otherwise linear
Typical Applications
▪ Bolted components
▪ Bearings
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Glue Connection
Description
▪ Easy way to connect dissimilar meshes
▪ Types:
▪ Surface-to-surface
▪ Edge-to-surface
▪ Leverages same cards used to define contact
surfaces
▪ Applies to all NX Nastran solutions
Benefits
▪ Significantly simplifies modeling
▪ Accounts for moment transfer between shells
and solids
▪ Improved accuracy for mid-surface modeling
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Continuous mesh
model
Hex/Tet glue mesh
model
Pressure load
Glue Connection Example
Turbine Blade
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Siemens PLM Software
Glue Connection Example
Turbine Blade
Continuous Mesh
ModelHex/Tet Glue Mesh
Model
Von Mises Stress
Results within 0.4%
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
External Superelements
Description
▪ Improved workflow using external
superelements
▪ What is an external superelement?
▪ Reduced model of a component
▪ Used in building block assembly of system
models
▪ Makes system solutions more efficient
Benefits
▪ Easier to set up solutions
▪ Easier to obtain results on superelements
▪ Easier to integrate components from 3rd
parties
Component
FEM
Component
FEM
Component
FEM
System
FEM
Superelement
Reduction
Superelement
Reduction
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Advanced Applications
Objective
▪ Deliver solutions for complex
applications in a variety of industries
Applications
▪ NVH
▪ Laminate composites
▪ Multi-physics
Benefits
▪ Evaluate product performance in real-
world conditions
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran for NVH Simulation
Typical NVH Evaluations Typical Response MetricsVirtual
Tools
Physical
Test
Full Vehicle
Rough Road Steering and seat vibration, interior noise FEM w/ acoustics Road Test
Idle Shake Steering and seat vibration FEM Road Test
Engine Boom Interior Noise FEM w/ acoustics Chassis Dyno
Body
Body Stiffness Fundamental mode frequency FEM BIW Impedence Test
Suspension
Gear Shift Steering and seat vibration FEM/MBD Chassis Dyno
Harshness Steering and seat vibration FEM/MBD Road Test
Wheel Unbalance/Brake Judder Steering and seat vibration FEM/MBD Road Test
Rough Road Steering and seat vibration / interior noise FEM Road Test
Brake Squeal Mode instability FEM
Brake Groan Strut vibration FEM/MBD
Driveline
Transmission Gear Noise Case vibration/Undercarriage FEM/BEM Chassis Dyno
Axle Gear Noise Carrier vibration/Undercarriage FEM/BEM Chassis Dyno
Powertrain
Radiated Operating Noise Underhood noise level MBD/FEM/BEM Engine Dyno
Intake Noise Underhood noise level FEM/BEM Engine Dyno
Exhaust Noise Undercarriage and tailpipe noise level FEM/BEM Engine Dyno
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Acoustic Structural Coupling
Description
▪ Accelerated Search (AS) algorithm for
calculating coupling matrix.
▪ Uses more efficient surface normal
projection search algorithm
▪ More than 100x performance improvement
▪ Consolidate acoustic parameters into new
case control cards
Capability included as part of NX Nastran
Basic bundle
0
50
100
150
200
250
300
350
Co
up
lin
g T
ime (
min
)
CP AS
Coupling
Computation
Time
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Siemens PLM Software
Analysis of Laminate Composites
▪ Composite materials finding use
in expanding range of
applications
▪ Simulation of composites and
integration with design.
▪ Vistagy(A Siemens PLM Software business)
▪ Design for composites
▪ NX Laminate Composites
▪ FEA modeling for composites
▪ NX Nastran
▪ FEA solver for composites
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Multi-physics
NX Nastran internal multi-physics
capabilities:
▪ Thermo-mechanical analysis
External solver integration multi-physics
capabilities:
▪ Thermo-mechanical
▪ NX Thermal → NX Nastran
▪ Fluid-structural (one way mapping)
▪ NX Flow → NX Nastran
▪ Motion-structural
▪ NX Motion → NX Nastran
▪ MSC ADAMS → NX Nastran
▪ Simpack → NX Nastran
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Siemens PLM Software
Case Study
Changchun Institute of Optics, Fine Mechanics &
Physics (CIOMP)
Business challenge:
▪ Manage increasing complexity of optical system
design
▪ Achieve continuous growth and improvement
Solution:
▪ Implement NX & NX Nastran as integrated,
multidiscipline simulation solution
▪ Leverage extensive and highly focused training
during NX implementation
Results:
▪ Advanced simulation now facilitating mechanical
and thermal analyses
▪ Multidiscipline design practices successfully
established, including integrated and optimized
design capabilities
▪ Improved efficiency and innovation, including
streamlined development of the orbit thermal
model of the remote space sensor
"With NX, the analysis of both
the mechanical and thermal
characteristics of the entire
model can be performed
accurately, thereby streamlining
the process."
Chen Changzheng
Associate Researcher
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Multi-physics
Fluid-structural Analysis
Description:
▪ Map pressure results from CFD analysis onto
dissimilarly-meshed structural model
Example: Fuel tank
▪ Evaluate fuel tank structural integrity against gas
sloshing inside
▪ One-way fluid-structural: pressure results from NX
Flow used by NX Nastran to compute stresses,
deformations
Fuel Tank
CFD FEM
Struct. FEM
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Multi-physics
Fluid-structural Analysis Example
Transient CFD Results
Flow Mapping solution used to create the
NX Nastran subcases & loads
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Siemens PLM Software
Multi-body Dynamic Interfaces
Description:
▪ Direct export of flexible body file formats
▪ ADAMS, RecurDyn, OP4, Matlab, SIMPACK
▪ Detailed stress data recovery
▪ Matrix format options
▪ Standard
▪ State-Space for controls algorithms
Benefit:
▪ Allow flexible bodies to be used in mechanism simulations
▪ Recover detailed stresses that can be used for durability
predictions
Typical Applications:
▪ Powertrain reciprocating components
▪ Machine tools
▪ Motor systems
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Flexibility and Openness
Siemens’ philosophy to develop open
products
Nastran formats are commonly used
as standard for CAE data exchange
Tools to widen usage and flexibility
to add custom analysis modules:
▪ DMAP
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
DMAP for Custom Solutions
Direct Matrix Abstraction Programming
▪ Similar to FORTRAN
▪ Provides full access to the functions of NX Nastran
▪ The language used for all solutions in NX Nastran
Modify NX Nastran solutions
▪ Add additional output
▪ Calculate additional quantities
▪ Change the way the problem is solved
Access NX Nastran database
▪ Store information for later use
▪ Retrieve information for use in other applications
Run external programs (spawn a process)
during the NX Nastran execution
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Open Environment
Many complementary CAE solution
partners:
▪ Acoustics – SFE, FFT, LMS
▪ Aeroelastic – Zona
▪ Correlation – DDS
▪ Durability – Safe Technology, nCode
▪ Materials – Datapoint Labs
▪ MBD – MSC(ADAMS), Function Bay,
SIMPACK, AVL
▪ NVH – CDH
▪ Optimization – FE Design, VR&D, Test –
B&K
▪ Pre/Post – MSC (Patran), T-Systems,
Altair, TMP
▪ HPC – Platform Computing, Intel, HP,
IBM
Pre/Post
Durability
Optimization
Correlation
Acoustics
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
NX Nastran
The Premier FEA Solver
Multiple solution domains - One solver
Computational performance and numerical accuracy
Ease of modeling and engineering workflow
Advanced applications
Flexibility and openness
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Why Choose NX Nastran?
Technology:
▪ Superior connectivity modeling (Glue, linear contact, bolt preloads)
▪ New elements (Pyramid, axi-symmetric)
▪ Performance (More scalable parallel processing)
▪ Pre/Post Integration (High level integration of Nastran in NX and Femap
Pre/Post)
Licensing & Bundling:
▪ NX Nastran Basic includes functionality that requires add-
ons in other Nastran (Linear contact, glue, shared memory processing,
advanced acoustics, spot welds)
▪ NX Nastran Parallel Processing uses only one license for
any number of CPUs (Others require a license for each CPU)
Support
▪ Always reach a live person for call-in support requests
▪ Support located local to each region
© Siemens AG 2012. All Rights Reserved.
Siemens PLM Software
Scalable Licensing and Bundling
NX Nastran Basic Bundle*
Linear static analysis
Normal modes analysis
Buckling analysis
Heat transfer analysis (steady-state and transient)
Basic implicit nonlinear analysis
Spot weld analysis
Accelerated Acoustic Coupling
NX Nastran Advanced Bundle – Add-on
Dynamic response analysis module
Aeroelasticity analysis module
Superelements analysis module
Direct matrix abstraction programming (DMAP)
Distributed memory parallel capability (DMP)
NX Nastran Optimization – Add-on
Design optimization module
NX Nastran Advanced Non-Linear – Add-on
Implicit solver
Explicit solver
NX Nastran Rotor Dynamics – Add-on
Rotor dynamics
Scalability:
▪ High-end analysis
▪ Design embedded analysis
NX Nastran Desktop:
▪ Initializes from within the CAE preprocessing
environment (NX CAE or Femap)
▪ Ideal for smaller customers without
centralized computing servers.
NX Nastran Enterprise:
▪ Can be located on a different CPU from the
preprocessing system
▪ Solve valid Nastran decks from any
preprocessor (NX CAE, Femap, MSC Patran,
Altair HyperMesh and others)
▪ Provides the most flexibility*Basic bundle is a prerequisite for all add-on modules and the
Advanced bundle
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Integration with NX CAE and Femap
NASTRAN
CAE
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Simulation Wizards
Part validation
Design trade-offs
Stress & vibration
Guided process
Casual CAD user
Included with any NX CAD seat
Design Simulation
Embedded in NX CAD
Part / assembly validation
Design trade-offs
Statics / modal / thermal
Design engineer
Advanced Simulation
Embedded in NX
Multi-physics environment
Powerful FE modeling tools
Statics, modal, buckling,
dynamics, thermal non-linear,
more...
Expert analyst
Problem Complexity
User
NX Nastran & NX CAE
Scalable Solutions for Product Engineering
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NX Nastran Support in NX CAE
NX Nastran Environment
▪ Defined in the native NX
Nastran data model
▪ User interaction is based
on the solver language
▪ Broad capability coverage
Benefits
▪ UI in Nastran terminology
▪ Elements, loads, boundary
conditions, etc. shown as
NX Nastran terms
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Siemens PLM Software
Other NX CAE Solutions Leveraging NX Nastran
NX Durability
Wizard
NX Advanced
Durability
NX Response
Simulation
NX FE Model
Correlation
NX Topology
Optimization
NX Motion
Flexible Body
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Third-party FEA Preprocessors
ANSA Altair HyperMesh® MSC Patran others
Supported by Third-party Pre/Post
NASTRAN
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GTAC
World-class Support
General CAE
▪ Broad based engineering and solver experience
▪ Nastran translator/integration experience
▪ NX, I-deas, Femap and 3rd party Pre/Post.
NX Nastran Specific
▪ Nastran specialists located in each world region.
▪ Specialist team tightly integrated across the organization
▪ Strategic partners for experiential based support
Support monitored for quality and responsiveness
▪ Positive customer feedback underlines
All requests are logged and tracked in system
▪ Requests do not get lost
▪ Performance metrics are tracked
▪ Online access to check status
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Case Study
Lockheed Martin Aerospace
Background
▪ Builds aeronautic vehicles for US military (F-22 Fighter, F-35 Joint Strike Fighter, C-130
Hercules)
▪ Used MSC Nastran for many years
along with MSC Patran
Standardized to NX Nastran
▪ Very easy transition – could produce
same results as MSC Nastran
▪ Liked unique capabilities of NX Nastran
for contact and glue connections
▪ Cost effective site-wide licenses across
multiple locations
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Why Siemens?
Major Investments in CAE for Product Development
“The integration of product development, simulation and validation is
now at the top of our agenda.”
Anton Huber, CEO
Siemens Industry Automation
“We are investing heavily in CAE … for multi-disciplinary analysis
throughout the product definition cycle.”
Chuck Grindstaff, CEO
Siemens PLM Software
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Siemens PLM Software
Develop products
faster
Increase product
quality
Reduce
costs
Smarter decisions, better products
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Siemens PLM Software
© Siemens AG 2012. All Rights Reserved.
Thank You
Smarter Decisions,
Better Products