29 January 2010 New Russian Fifth-Generation Fighter made his first flight. This aircraft was designed by company Sukhoi with the engines designed by NPO Saturn. Sigma Technology congratulates the companies with this exciting event and would like to express its proud especially because both companies have used IOSO Optimization software as a regular part in their design and development technological cycle.

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Multicriteria design optimization software - IOSO NM.
IOSO NM - Universal software for complex real-life optimization problems.
Unique capabilities of IOSO NM allow:

to increase considerably the efficiency of the object under optimization and obtain technical solutions having no analogues by means of multifactor (up to 100 variables and up to 100  constraints) and multiobjective (up to 20 objectives) optimization;

to reduce considerably the terms and expenditures of the research;

to create supporting versatile systems for decision makers;

to link and solve tasks being computed by different program modules (multidisciplinary optimization) within the common project.
  


IOSO NM software can be easily integrated with different applications for engineering analysis both in-house and commercial, such as NASTRAN, ANSYS, StarCD, FineDesign, Fluent etc.

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New features in Laminate Tools version 4.0  (first release, since launch of version 3.4)
Geometry

new module, introducing new functionality with potential for many further features
new STEP and IGES file format import capability
automatic mesh conversion with surface sew function
automatic Element Set creation for imported surfaces, for easy selection

Design
added draping warp and weft angle deviation graphics
implemented Element Set picking in graphics
corrected problems with Reverse ply application in Layup
re-introduced STL format import node merge tolerance, added edge sew tolerance

Manufacturing
added support for generation of exact innermost / outermost layup surfaces as point clouds
improved exact flat pattern calculations by preserving surface normals at ply edges

Analysis

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NEi Nastran is an engineering analysis and simulation software product of NEi Software (formerly known as Noran Engineering, Inc.) Based on NASA's Structural Analysis program, the software is a finite element analysis (FEA) solver used to generate solutions for linear and nonlinear stress, dynamics, and heat transfer characteristics of structures and mechanical components. NEi Nastran software is used with all major industry pre and post processors including Femap, a product of Siemens PLM Software, in house brands NEi Fusion, and NEi Works for SolidWorks.



History
Main article: NASTRAN
The original NASTRAN program came out of NASA’s need to develop a common generic structural analysis program that would be used by all of the centers supporting the space program. A specification was written and a contract was awarded to Computer Sciences Corporation for development of NAsa STRuctural ANalysis (NASTRAN) software. NASTRAN was released to NASA in 1968. In addition to NEi Nastran, commercial versions of are also available from Siemens PLM Software (NX Nastran) and others.

Improvements
Main article: Finite element analysis
In the late 1960’s, Finite Element Analysis software was confined to run on expensive mainframe computers and highly trained specialists were needed to apply the program. In this environment, the aerospace industry was the typical user because they had critical projects which could justify the resources FEA demanded. With improvements to the software and wider use of mainframes, FEA technology gradually spread to large corporations that could afford funding the huge investment in hardware, software, and a dedicated FEA staff. Usage spread from primarily aerospace and military applications to the automobile and maritime industries.

The microprocessor revolution and the advent of Personal Computers (PCs) in the 1980’s brought tremendous improvements in computing power, significant reductions in computing costs, and the steady development of numerical methods and algorithms. In the mid 1980’s, Noran Engineering recognized the long term advantages and impact that the PC hardware revolution could have on the engineering analysis field and embarked on a project to significantly enhance and modernize the original NASTRAN code and port it to PCs.

The first commercial version of NEi Nastran for use on PCs was released in 1990. The new code had a number of changes in architecture and programming language compared to legacy Nastran written originally for mainframes. These differences were intended to take advantage of the dramatic changes in computer hardware taking place and provide the code with key strategic advantages for the new PC platform. For example, since the cost of memory was dramatically reduced it was feasible to perform many operations faster in memory that normally were only done on disk.

Another example concerns Nastran’s DMAP (Dynamic Matrix Abstraction Process). DMAP altars were originally intended to provide flexibility and customization capabilities. However, the method has lost much of its initial intent and advantage since it now requires familiarity with arcane computer code and maintenance revisions must be written each time a new Nastran software version is released. With NEi Nastran, DMAP routines are easily added to the main body of the program and maintenance revisions are not necessary.

Present day

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Setting up and launching a parallel simulation has become much simpler and easier in CFD-FASTRAN V2007. This note discusses some of these developments.

Let’s start with things that have not changed. There are still two versions of CFD-FASTRAN solvers for parallel cases. The difference between the two versions is the underlying parallel communication mechanism, the choice of which is decided by the type of mesh used. Structured mesh models use MDICE (Multi-Disciplinary Computing Environment) and unstructured mesh models use MPI (Message Passing Interface). MDICE allows different applications to “talk” to each other and hence allows multi-disciplinary simulations such as coupled flow-structure simulations possible without integrating all features (disciplines) into a single code.

The following steps have been removed from V2007:

Need to run special scripts as part of the installation procedure
Need to launch MDICE registry and daemons
Need to launch parallel job only from the command prompt using different scripts such as CFD-FASTRAN-SOLVERP and fastran-mpi
These operations are automatically performed by the script behind the scenes, and hence the user does not have to perform these steps.

The following options have been added to setup parallel cases for CFD-FASTRAN:

Can setup both MDICE-based and MPI-based simulations using the improved parallel configuration panel (located on the Run tab)
Can launch a parallel job (MDICE or MPI) from CFD-FASTRAN-GUI or command prompt
A single command-prompt command for all (serial and parallel) FASTRAN job submissions (CFD-FASTRAN-SOLVER –dtf <file name>)
Can easily edit available hosts through CFD-FASTRAN-GUI
Now, we look at some of the settings available in the new Parallel Setup Panel. This panel can be reached through the Configure Parallel Run option available in the Run tab when parallel is selected as the Run Type. Depending on the type of mesh used, the MDICE or MPI panel will become available. The Host List can be edited by clicking on the Edit button on the left hand side of the parallel setup panel.

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- The data can be output using SALT in any format required (text or
binary). Documentation of the SALT<->RTM-Worx interface is almost
finished; it will be on the download page within a few weeks.

- 3D will be finished soon.

- Capillary force on resin flow is very small and does not have
significant effect because it is very localized (near the flow front).
However, we may put a hook into RTM-Worx to allow extension of the model
through SALT.

- For curing we have an extension module. This can be combined with SALT
scripts to generate powerful solutions.

Note on SALT: SALT is a fast scripting language that supports
imperative, object oriented and functional programming. It is easy to
learn and very powerful and we have embedded this scripting engine in

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New functionality: Release 2.1

Faster engineering, securer data handling, convenient modeling and flexible licensing are now at hand with the new upgrade of the FRIENDSHIP-Framework. Release 2.1 includes new functionalities, operational refinement and strategies for efficient design, which help you to perform better and to create superior products. Functionalities that boost your design contribute to an overall slimmer design process. A design process that raises the bar for efficiency, user-friendliness and applicability—and that strengthens your and your designs' competitive performance.

In brief, the FRIENDSHIP-Framework 2.1 provides

Faster engineering through remote computing

Safer file handling through enhanced data management

Individualized work through the Configuration Wizard

Boosted surface design through hands-on point manipulation and validation

Flexible operation through extended licensing modes

Fully-parametric design of turbomachinery blades

A number of additional solutions for quicker, better and handier design

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In certain applications, different regions of the computational domain experience flow conditions that are so different that it is very difficult for any solver to produce sufficiently accurate results at the limits. In many situations, such problems can be separated and solved using loosely coupled solvers. Each solver is chosen to provide highly accurate solutions for the prevailing flow regimes. This kind of flexibility and fidelity is necessary when users are moving towards simulation-driven design solutions.

ESI's CFD-FASTRAN, a compressible flow solver, is ideally suited for high-speed external aerodynamics problems while the multi-physics solver CFD-ACE+ is best for heat transfer problems involving conduction, convection (natural and forced) and radiation. Several users may already be aware of FASTRAN/ACE+ coupling for fluid-structure interaction (FSI) simulations. From v2009.2, users can take advantage of a new FASTRAN/ACE+ coupling for heat transfer simulations. A typical application example (see figure 1 below) on thermal environment simulation is presented to help you get started on applications where you can use this feature.



Figure 1.  Re-entry capsule at angle of attack. Mach number contours are displayed for the external flow;
internal flow is represented by velocity vectors; capsule thickness and internal component show temperature distribution.

A large amount of aerodynamic heating is generated over hypersonic vehicles during re-entry. Thermal Protection System (TPS) materials are employed to prevent the heat from conducting into the internal cabin, which holds electronic devices, passengers, and other vital components. As a time-dependent process, the material making up TPS is at a low temperature and “soaks up” the heat – the conductivity of the material transports the heat (from the vehicle surface) through the thickness and into the internal volume. The material will also radiate some of the heat back to the flow – the amount depending on the emissivity of the material. A primary concern is to estimate the effects of aeroheating on the internal volume of the capsule, and its effect on electronic devices, passengers and cooling systems. In this application, typically the external flow is hypersonic in nature, whereas the flow within the capsule is a very low-speed flow dominated by natural convection. In addition to hypersonic aerodynamic heating, several other physics including heat conduction, natural convection and radiation have to be accurately modeled. CFD-FASTRAN solves for the external hypersonic flow and CFD-ACE+ solves for internal flow, heat conduction, convection and radiation. Exchange of heat flux/temperature data between the CFD-FASTRAN and CFD-ACE+ solvers occurs at defined interfaces. A simple demo case can be downloaded here.

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ESI Group, a pioneer and world-leading supplier of digital simulation software for prototyping and manufacturing processes, announced today the latest release of the ACE+ suite of Computational Fluid Dynamics (CFD) and Multiphysics simulation software.

Version 2009.2 includes new enhancements of significant benefit for automotive, aerospace, fuel cell, and electronics customers.

Shorter prototyping process
The ACE+ suite allows the acceleration of the product development process by accurately simulating multiple physics in a single solution. Built around the CFD-ACE+ multiphysics solver and including specialized technology tailored to solve difficult applications, the tools within the suite can analyze complex physical phenomenon at the macro, micro, and even nano scales. The suite, also comprised of advanced automated meshing using CFD-VisCART’s adaptive mesh generation, substantially reduces the time needed to prepare complex geometries compared to traditional hex or tetrahedral meshing methods. This unique combination of specialized solver technology and advanced productivity tools makes the ACE+ Suite a powerful asset for customers.
Version 2009.2 includes significant updates to the CFD-ACE+ Advanced CFD and Multiphysics solver, CFD-FASTRAN density-based solver for high-mach flows, CFD-GEOM modeler and mesh generator, CFD-VisCART adaptive automated mesh generator, and CFD-VIEW visualization tools. Those enhancements have been made to increase usability, robustness and accuracy.

Benefits to select industries
Automotive customers will receive an increased benefit from the implementation of a new advanced turbulence model and the inclusion of automated boundary layer meshing in CFD-VisCART, which has dramatically improved both the speed and accuracy for large aerodynamic simulations.

New aerospace applications were addressed in this release with the ability to allow thermal coupling between CFD-FASTRAN and CFD-ACE+ to simulate high-mach re-entry heating of spacecraft. Fuel cell design engineers continue to benefit from a multi-year investment by the US Department of Energy to refine the multi-phase and porous media capability of CFD-ACE+, allowing ESI customers to simulate more accurately the electrical, structural, and water management performance of these complex electrochemical energy conversion devices.

Finally, the semiconductor manufacturing process simulation toolset received improvements for analyzing capacitive coupled plasma (CCP), which is one of the most common types of industrial plasma sources.

“The latest release of the ACE+ Suite includes many new features and developments designed to further improve our value proposition of high productivity coupled with highly accurate physics for the applications we have targeted”, said Joseph Strelow, Director of Virtual Environment Solutions at ESI. “This release benefits significantly from the expansion of our global CFD services activity which is becoming the driving force behind this application-focused approach to development”.
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put on our web-site third-party references to IOSO from other well-known scientists in optimization field: http://www.iosotech.com/product.htm#Third-party



George S. Dulikravich, Florida International University
AFOSR - Air Force Office of Scientific Research, US:

Page 2
Currently, a Russian commercially available software named IOSO is the most efficient and the most robust multi-objective optimization software… IOSO, which involves concepts of neural networks, radial basis functions, and self-adapting response surface methodologies, requires the minimum number of the objective function evaluations and that is the most versatile and robust multi-objective optimizer.  Details…



Timothy W. Simpson, The Pennsylvania State University, US
Vasilli Toropov, University of Leeds, UK

Page 13
IOSO offers unique state of the art optimization algorithms that are based on self-organizational strategy and efficiently combine traditional response surface methodology with gradient-based optimization and evolutionary algorithms in a single run. The offered algorithms are equally efficient for the problems of complex and simple topology that may include mixed types of variables. Details...

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When using cfd-ace-mpi or CFD-SOLVER for parallel computations on a Linux/Unix cluster, you will be prompted for a password for each node you are using in the parallel computation. This will also be the case when running a parallel simulation from the GUI since it uses cfd-ace-mpi or CFD-SOLVER. To prevent the prompt for a password, you can use ssh authentication to log into each machine with no password.

The basic idea is to use the ssh connectivity to avoid the request for the password. While there are a couple of different ways to do this, this tip will cover how to generate authentication keys and add the remote hosts to your known hosts file on the master machine. Once you have generated these keys, you will have password-less access to each of the remote machines that have the proper authentication keys.

Here are the steps to create password-less access if you have a shared home directory:

The authentication keys need to be created and they will be in the $HOME/.ssh directory.
ssh-keygen –t dsa


The public key should be copied into the authorized_keys file.
cd $HOME/.ssh

cat id_dsa.pub >> authorized_keys
chmod 600 authorized_keys


After updating the authorized_keys file, login to each remote machine in the cluster to test the connection and update the known_hosts file. For each machine, you will be prompted to add each machine to the known_hosts file on the host machine.

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软件背景：IOSO NM是由俄罗斯SIGMA Technology公司
开发，能提高各种复杂系统和过程的优化设计效率。它可以
把工程师从十分复杂和繁重的设计参数寻优工作中解放出来，
从而使工程师能集中精力于核心问题。

软件特性：
针对大规模计算任务的高效而独特的算法
易于操控的全自动优化过程
较低的资源消耗
并行优化过程
良好的设计优化健壮性

软件优势：IOSO NM能从容地处理大规模优化任务，最大优化目标可达20，最大的优化变量为100. IOSO NM采用了开放式消息传递架构，可集成不同的商用CAE和CFD软件，如ABAQUS, MSC Nastran，ANSYS, CFX, Fluent，StarCD, Numeca等。
有关2.0版，请参考附件
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Blue Ridge Numerics is committed to the development of student engineers and would like to empower
your competitive engineering team with the leading upfront CFD software. With CFdesign you can
aggressively drive innovation by conducting fluid flow and heat transfer design studies as part of your
CAD-driven design process. Unlike traditional CFD, CFdesign is not a career path… it’s a tool designed
specifically for multi-tasking engineers working against tight deadlines.

We are currently accepting applications from student engineering teams participating in:

Baja SAE Series EcoCAR Challenge
Formula Hybrid Formula Student
Formula SAE Series Solar Decathlon
North American Solar Challenge  

Take  the next step…
Fill out and submit the CFdesign sponsorship request form below. We will contact you to obtain any  
additional information needed. If your team is approved, we will provide access and instructions on how
to download CFdesign from our customer portal.

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