What’s New in Opera€¦ · What’s New in Opera ... Uses Self-consistent plasma boundary method to model low density ... the maximum average flux density case is saved in the

FEA ANALYSIS

General-purpose multi-physics design and analysis software for a wide range of applications

INTEROPERABILITY

Built-in circuit modelling and interfaces to leading CAD packages

SERVICE

Technical support, training and consultancy services available for software usage and applications

OPTIMIZER

Automatically selects and manages multiple goal-seeking algorithms

What’s New in Opera By Nigel Atkinson

Cobham Technical Services

Last Time

• EUGM Oxford Sept 18/19 2012

– Current release Opera 15r2

• Announced switch from 4 to 6-month release cycle after 15r3

• Opera 15r3 Scheduled for November 2012

• Opera 16 Scheduled for May 2013

• Opera 16r1 Scheduled for November 2013

European User Group Meeting 2013 NAA - What's New 1


Focus for New releases

• What do users want?

• Capability

• Ease-of-use

• Speed

• Robustness



What did we promise?

• Opera 15r3

– Electric/Thermal Impedance Boundary Condition

– Mechanical Modal Analysis

• Student Edition

• Opera 16

– Parallelization

– Graphing

– Multiphysics



Opera 15r3

• Released on-time in November 2012

– New boundary conditions to represent thin gaps

• Electromagnetic and thermal

– Developments for mechanical simulations

• Modal analysis

• Fully anisotropic materials

– Other improvements

• Circuit Editor

• Automatic scaling of vectors

• DEMAG materials

• SSORCG solver



EIBC in Electromagnetics

• Many electromagnetic models need to include very small gaps between or within materials

– Intentional

• Usually to interrupt eddy current paths

• Segmented permanent magnets in electrical machines

– Unintentional

• Construction of transformers from E-core and closing “bar”

– Damage

• NDT probes to detect small cracks caused by fatigue etc.

• For many applications , it is sufficient to consider the gap as infinitely thin with appropriate characteristics

– Current cannot flow normally across the gap

– Tangential components of magnetic field on the gap face are continuous

• The boundary condition is available in:

– TOSCA current flow (not with lossy dielectrics)

– ELEKTRA

– CARMEN

– DEMAG



TIBC in Thermal

• The thermal software also has a new boundary condition

• There is often poor contact between materials that are next to each other which inhibit flow of heat from one component to another

– Usually called contact conductance or contact resistance

• A similar boundary condition to the Electric insulator has been introduced for TEMPO and QUENCH

– This allows heat to cross normally but produces a temperature jump across the boundary condition face


Units are

W/length²-K


Static Stress Solver

• Fully Anisotropic Materials

– upper triangle of the elasticity matrix, sometimes called the elastic modulus tensor or the material stiffness matrix. The upper triangle has 21 terms.

• General Expansion integrals

– General expansion integrals provide a way of defining a pre-existing strain on a model. This can be calculated from any fields stored in the database.

• Magnetostriction can be calculated as a function of B.

• Electrostriction can be calculated as a function of D and E.

• Example:

– TOSCA to calculate B, then imported into STRESS/ST model.

• Magnetostrictive expansion given by a user defined function of B.



Structural Eigenvalue Solver

• STRESS/EV is a new analysis program which calculates the eigenvalues (modes or natural frequencies) of a body at rest.

• No internal or external forces or pre-strains.

• Usual range of post-processing options



V15r3 Miscellaneous Enhancements

• Circuit Editor

– Multiple vfc files for circuit-building

– HTML Report Generator

• DEMAG Materials

– No longer need virgin B-H curve

• MAP Command

– Vectors automatically scaled

• Faster Linear Algebra

– New SSORCG solver



Student Edition

• Available Soon


Feature Limitation

Physics Low Frequency Electromagnetics

Solvers Static & Dynamic Only

Max number of elements 100,000

Max number of commands in a script 200 with maximum 2 tier nesting

Symmetry Up to 1:4

Max Number of Coils 5 with 1:4 Symmetry

Coil Calculations in Post-Processor Disabled

Multiple Instances of User interface Disabled

Multiple Instances of Solvers Disabled

Manager solution queue Local only


Opera V16 Overview

• Released May 2013



Opera Manager

• V16 Opera Manager options…

…Maximum threads per job

• Solver Parallelization

• Shared-Memory Implementation

• Licensed feature



V16 Opera-3d Parallel Solver Implementation

• There are many places where the overall analysis process can, in theory, be parallelized

– Pre-processing

• Meshing

• Database Creation

– Solution

• Coil-Field Calculations – Done in V16

• Matrix Fill

• Matrix Solution – Done in V16

– Post-processing

• Particle Tracks

• Coil-Field Calculations

• Some are easy to implement, some are difficult and lengthy

• Some give good speed-ups, some simply never will



Performance data - Beta


Model Name Active B-S conductors Type of conductors Analysis

Coil field / matrix solve % (4 vs 1) Fill % (4 vs 1) Total % (4 vs 1)

Test01 19 Racetrack TOSCA 25.96% 101.78% 32.32%

Test02 4+12 Racetrack+Bedstead TOSCA 28.08% 105.22% 44.19%


Test04 4 Bedstead TOSCA 26.77% 160.74% 53.61%


Test06 0 Soprano EV 31.00% 93.75% 67.27%

Test07 2 Racetrack TOSCA 36.56% 100.00% 67.98%

Test08 2 Helical Ends TOSCA 38.59% 101.42% 69.03%

Test09 0 Circuit ELEKTRA SS 74.57% 75.27%

Test10 1 Helical Ends TOSCA 41.72% 98.37% 79.16%

Test11 0 ELEKTRA SS 76.51% 80.49% 79.63%

Test12 0 Circuit ELEKTRA TR 100.96% 86.11%

Test13 0 Circuit ELEKTRA TR 97.06% 97.26%

Test14 0 Bedstead TOSCA 108.86% 99.44%


Multi-Core Parallel Licensing

• Multi-Core Parallel is a licensed feature

• One Pack enables all (applicable) solver types to run up to 4-way parallel

• Number of threads to use for each job is set in the Batch Processor Options

– Recorded when job submitted

– Will revert to single-thread if parallel license not available

• Multiple packs applied to a single job enable 22n threads:


Packs 0 1 2 3 4 5

Threads 1 4 16 64 256 1028


Graphing

• A new Graphing capability has been added to both Opera-2d and Opera-3d

• Graphs now appear on a separate “pane” to allow switching between graphs and the model

• Both Opera-2d and Opera-3d now work on the concept of buffers for plotting graphs for consistency



3D Multiphysics - Deformations

• The deformed shape can now be used in a subsequent electromagnetic or thermal analysis


Electro-magnetics

Thermal Stress


“Easy Multiphysics”

• Opera-3d Modeller now allows the selection of “Multiphysics” Analysis Type

• Multiphysics Settings:



Deformed Mesh

• Use the individual analysis settings to control whether the mesh should be deformed or not in the subsequent electromagnetic or thermal analysis.



SCALA Volume Plasma Emitter

• New licensed feature

• Uses Self-consistent plasma boundary method to model low density magnetised plasmas:

• determines the plasma boundary surface shape, together with the ion and electron currents that are consistent with the potential distribution caused by the space charge in the particle flows outside the plasma volume.

• Ions are not explicitly represented inside the plasma volume and the plasma is assumed to be quasi-neutral.

• The volume plasma emitter is normally used as part of closed cycle of linked secondary emitters. For example, a model will contain

– a volume plasma emitter that represents ionisation of argon gas by energetic electrons;

– a secondary surface emitter that creates electrons from colliding argon ions;

– a Volume backscatter emitter to model loss of energetic electrons.



Magnetron Sputtering

• Full 3D system evaluation including stray fields from adjacent devices

• Self-consistent charged particle modelling, including space charge and relativistic effects

• Multi-variable, multi-objective optimization

• Predict and Optimize:

– Erosion groove profiles

– Target utilization

– Substrate coating profiles

– Coating dynamics - for characteristics and quality



User Interface

• User Variables Dialog re-design


Click to re-sort

Right-Click to delete Double-Click

to edit


Circuits

• Capacitors and Inductors in Circuits

• Capacitances and inductances in circuits can now be functional. The values are calculated once when the analysis starts. The same functions can be used to calculate different values for a restart.



Machines Environments – 2D

• Current Density Input

– During preliminary design, users are now able to input currents in windings using a user defined maximum realistic current density (due to thermal constraints) and then evaluate the winding current (and voltage in some simulations). This development requires the user to be able to enter the current density and the fill factor. This option is available in PM_DC_ST and PM_AC_ST analyses.

• Average Torque

– The average torque is calculated by integration over the period and presented in the summary dialog for PM_RM and PM_AC_ST analyses.

• Active Mass

– The active mass of the machine is evaluated based on the user defined material density. The mass calculations are added for brushless PM machines and switch reluctance machines. The results are presented in the summary dialog. The mass evaluations (#mass_rotor and #mass_stator) can be used as constraints for the optimizer run.

• Average Flux densities in Stator & Rotor

– The purpose of this is to determine if material is being underused or, worse, subject to severe saturation. Average flux density is calculated for the machine for different rotor positions. Then the flux density plot for the maximum average flux density case is saved in the results folder.




• New - Synchronous reluctance machines

• Circular & Trapezoidal rotor voids



ME3D - SyncRel

• Trapezoidal Voids • Circular Voids




• Switched Reluctance Machines

• New geometric options:

– Rounded corners for stator and rotor teeth

– Tapered teeth




• New SRM Analysis options:

• Magnetostatic

– Range of currents with rotor aligned

– Range of different rotor positions

– Range of currents with rotor unaligned

Calculates

– flux linkage vs rotor position

– Flux linkage vs current for aligned & unaligned positions

– Torque vs angle

• Dynamic

– Mechanically-coupled analysis with hysteretic speed control

Calculates

– Torque vs angle at a given speed and advance angle

– Iron loss estimate in rotor & stator



SRM - Magnetostatics

• Flux Linkage vs Angle


• Flux Linkage vs Current • Torque vs Angle


SRM - Dynamic

• Angle vs Winding Current


• Excited Angle vs Torque • Time vs Speed


Thank You

Thank you


Documents

What’s New in Opera€¦ · What’s New in Opera ... Uses Self-consistent plasma boundary method to model low density ... the maximum average flux density case is saved in the