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August 2015 - Next Technology Course on Verification, Validation and Model Updating Announced

Registrations are now accepted for the Technology Course on Verification, Validation and Model Updating that will take place on March 16-18, 2016 in Leuven, Belgium.

This course is intended for anyone that is interested in learning the state-of-the-art in finite element model validation and updating with a focus on structural dynamics. FEMtools will be used for hands-on exercises during approximately half of the time and is therefore also a good opportunity for new customers and evaluators to get started with the program. It is therefore also a good opportunity for new users, occasional users and evaluators to learn more about FEMtools.

For more information and registration click here.

 

July 2015 - Full Field Modal Analysis using FEMtools MPE

Researchers at Technical University Vienna (Austria) and University of Bologna (Italy) have used FEMtools MPE to process massive amounts of vibration data collected with modern full field measurement technologies.

In the framework of the EU-sponsored TEFFMA project (Towards Experimental Full Field Modal Analysis, FP7-PEOPLE-2011-IEF-298543), a comparison is made by means of challenging optical technologies (SLDV, Hi-Speed DIC, Dynamic ESPI) on the same broad band vibration measurement problem of a lightweight plate, with different spatial resolution and quality of the measured patterns. For each measurement, an experimental modal model is extracted and finite element model updating results are compared between different full field technologies. The results expected from this research will strengthen the path of full field technologies in mechanical engineering and other fields, ranging from aerospace to vehicle technologies, electronic components, and advanced material behaviour analysis.

The following figure shows an example of such high-resolution mode shape. Full field measurements were taken at 49042 points resulting in FRFs at 1285 frequency lines and occupying several GB of disk space per experiment. All FRFs of an experiment could be imported in FEMtools and efficiently processed by the Modal Parameter Extractor (MPE) add-on for extraction of mode shapes.

Full Field Modal Analysis (TEFFMA Project)

Plate mode shape at around 246 Hz obtained using FEMtools MPE, from FRFs measured by ESPI using a 226x217 measurement grid.

The research team will present their most recent results at the International Conference on Engineering Vibration (ICoEV), September 7-10, 2015,  Ljubljana (Slovenia).

For more information, see the TEFFMA project webpage (http://cordis.europa.eu/project/rcn/103580_it.html) and the researcher's web page (http://www.diem.ing.unibo.it/personale/zanarini/Zanarini_ricerca_EN.htm)

 

June 2015 - FEMtools 3.8.1 Maintenance Release

Dynamic Design Solutions announces the release of FEMtools 3.8.1.

FEMtools 3.8.1 is a maintenance release that provides bug corrections and various enhancements to the framework, data interface programs, user interface, analysis modules, commands and API functions.

FEMtools 3.8.1 is available as a free upgrade for all customers with current maintenance and technical support contract. License files for FEMtools v3.8.0 remain valid for v3.8.1.

Customers with current support and maintenance can find more information on this release and how to download the installation packs in the FEMtools Support site.  A login name and password is required to access the support pages. If you have a current Maintenance and Support contract and did not yet receive a login name and password, then register at http://www.femtools.com/support.htm or send a request to support@femtools.com.

 

June 2015 - Webinar on Modal Test Planning and FE-Test Correlation Analysis

Dynamic Design Solutions presents a free webinar on modal test planning and FE-Test correlation analysis.

In this webinar we will focus on modal test planning and FE-test correlation analysis. You will learn what correlation analysis is, which techniques and metrics are available and how this fits within the FE model updating process. It will also be explained how a baseline finite element model can be used to prepare a physical modal test. This step is necessary to ensure that the test data will be adequate to serve as reference data to validate and update the finite element model. 

The webinars will be held on Wednesday July 1, 2015 at 11:00 AM Eastern EDT (UTC-4)  and Thursday July 2, at 10:00 AM Brussels CEST (UTC+2).

For more information and registration click here.

 

May 2015 - Seminar on Nonlinear Modal Analysis

Dynamic Design Solution will collaborate with m+p International, University of Illinois at Urbana-Champaign and The Modal Shop to present a one-day seminar on nonlinear modal analysis. This one day seminar serves as an introduction to the field including lab demonstrations of the tools in operation on a simulated but representative model of an airframe with nonlinearities. Presenter is Prof. A.F. Vakakis; Date and location: June 15, 2015 on the campus of the University of Illinois at Urbana-Champaign. Contact to reserve your place is Tim Copeland at m+p International (217-391-4573).

FEMtools was used for pretest analysis, FE-test modal correlation and FE model updating of the airframe model (see images).

  

February 2015 - DDS Joins Research Advising Group on 3D Printing

Dynamic Design Solutions has joined a Belgian group of companies that will advise on research of the mechanical properties of components that are manufactured using 3D printing techniques (aka additive manufacturing).  The group aims at developing validated design tools for reliable functional industrial components. Several 3D printing techniques will be evaluated and manufactured products studied under different realistic load cases to obtain information on stiffness and strength properties, variability of the results and property influencing factors.

The research is performed under a Belgian technology transfers program (TETRA) and aims to obtain guidelines and best practices information of immediate interest to industry. Several campuses of KU Leuven (campus Thomas More, KAHO, PMA) collaborate to complete the two-year project with a group of companies advising on the work program. Apart from DDS, other advising companies include Siemens, Materialise and several orthopedic products manufacturers.

 

January 2015 - See FEMtools at the 33th IMAC 2015 Conference in Orlando

Dynamic Design Solutions will show FEMtools 3.8 at the 33th International Modal Analysis Conference  (IMAC 2015) that is held from February 2-5, 2015 in Orlando, Florida.

IMAC is an annual conference that brings together academia and technologist to discuss a broad range of topics related to vibration analysis. This years theme will be "Balancing Simulation and Testing". In addition to the technical program, the event also includes pre-conference courses, meetings of the different interest groups and an exhibition

Please come and visit us at booth #104 in the exhibition area to check out the newest release of FEMtools discussing your dynamics simulation, modal pretest planning, test-analysis correlation and FE model updating needs.

For more information about this event visit http://www.sem.org/CONF-IMAC-TOP.asp

 

December 2014 - Release of FEMtools 3.8

Dynamic Design Solutions announces the release of FEMtools 3.8. The new version is available for download from December 4.

FEMtools 3.8 is a major revision of the FEMtools software suite with improvements and extensions in all modules of the program. The highlights of this new release are summarized hereafter:

  • Mesh generation commands can now be used to directly generate test models. Previously an FE model was generated that was subsequently converted in a test model.
  • Generation of master DOFs for model reduction and superelements is extended to provide more options.
  • FRF Computation uses new dialog boxes to generate FRFs from analytical or test modes in a faster and more efficient way.
  • It is now possible to add a gravity load to static analyses. This is also supported for topology optimization.
  • Improvements are made to the Pretest Analysis tools for Nodal Kinetic Energy analysis, automated and manual sensor selection and a new tool for mass loading sensitivity analysis is added.
  • Mode shape pairing for axisymmetric structures and AutoMAC analysis are improved with new settings.
  • A new tool for Automated Mode Tracking (AMT) is added to compare mode shapes of a modified model with a set of reference modes and to identify mode switches. This feature can be used in design modification tools.
  • It is now possible to define generic parameters for sensitivity analysis and model updating. Generic parameters offer the flexibility to use any value that is accessible from an external database as parameter.
  • Parameter Relations:
    • It is now possible to define relations using parameter labels as an alternative to using parameter indices. This simplifies the definition and editing of parameter relations.
    • A new type of relations, group relations, has been introduced. Group relations are defined on labels: the relation will modify all the parameters with the specified labels in the same way.
  • It is now possible to use a generic solver for sensitivity analysis and model updating. A generic solver is an external solver that is piloted with a custom-developed script.
  • Model updating using generic parameters, responses and solvers is now available for completely customizable implementation of automated updating processes.
  • The Monte Carlo Simulation (MCS) tool for probabilistic analysis has been reworked and now offers new commands, settings, and dialog boxes. More specifically the following features are significantly improved: importing test data, sampling, statistical property estimation, sample evaluation and postprocessing.
  • An additional applet for local modal parameter extraction is added to the FEMtools Modal Parameter Extractor (MPE) add-on and the global extractor tool is extended with additional commands for modal extraction automation. The addition of an applet for local modal parameter extraction has been a regular user request since the release of the original MPE add-on. A local extraction tool is preferred to extract modal parameters from test data that are affected by mass loading.
  • Extended scripting functionality is offered through 26 new and 29 modified commands to be used in command scripts. FEMtools Script programmers will benefit from enhanced FEMtools API functions.
  • The FE data interfaces and solver drivers (Abaqus, Ansys and Nastran) are upgraded to support the latest version of the external solvers. The interfaces are extended in response to customer requests.
  • A new OAPI-based version of the SAP2000 interface and driver is introduced for enhanced correlation analysis and model updating of SAP model.

FEMtools 3.8 is available for Windows, Linux and Mac OS as a free upgrade for all customers with current Maintenance and Technical Support.

 

November 2014 - FEMtools Introduced at Chinese V&V Meeting

FEMtools Model Updating was introduced during a meeting of a Chinese interest group on Verification and Validation (V&V) that was held on 15 and 16 November 2014, in XiAn City, China. This meeting was organized by the Chinese Academy of Engineering Physics and Northwestern Polytechnical University. Participants from universities, institutes and companies attended presentations and discussion sessions about V&V topics related to structural dynamics, testing, computational mechanics, reliability and complex engineering design.

Beijing ALLSTAR Technology Corporation, distributor of Dynamic Design Solutions in China, introduced FEMtools features for finite element model validation and updating and its applications in engineering (see picture). FEMtools was the only commercial V&V product presented at this meeting and its applicability in different fields of engineering was received with great interest by the participants.

V&V Meeting at Xi'an City, China.

 

October 2014 - Mac OS X 10.10 Yosemite Compatibility of FEMtools

Dynamic Design Solutions has conducted compatibility tests with Mac OS X 10.10 Yosemite which have shown that the current FEMtools 3.7.2 version works without any specific issues under this recently released version of the Mac OS X operating system.

Further compatibility and performance tests with the Yosemite version of Mac OS will be done and new information will be provided as it becomes available.

 

September 2014 - FEMtools License Manager Supported by IBM Platform Computing

Reprise Software, the developers of the Reprise LM license manager that is used by FEMtools, announces that IBM Platform Computing has added support for the Reprise License Manager (RLM) to its Platform RTM v9.1.3. IBM Platform RTM is an operational dashboard for IBM Platform LSF environments that provides comprehensive workload monitoring, reporting and management. Platform RTM provides a complete, integrated monitoring facility that is designed specifically for Platform LSF environments.

FEMtools customers that use the IBM Platform License Scheduler will be able to benefit from integrated RLM support from the end of August, 2014.

 

August 2014 - FEMtools 3.7.2 Maintenance Release

Dynamic Design Solutions announces the release of FEMtools 3.7.2.

FEMtools 3.7.2 is a maintenance release that provides bug corrections and various enhancements to the framework, data interface programs, user interface, analysis modules, commands and API functions.

FEMtools 3.7.2 is available as a free upgrade for all customers with current maintenance and technical support contract. License files for FEMtools v3.7.0 or v3.7.1 remain valid for v3.7.2.

Customers with current support and maintenance can find more information on this release and how to download the installation packs in the FEMtools Support site.  A login name and password is required to access the support pages. If you have a current Maintenance and Support contract and did not yet receive a login name and password, then register at http://www.femtools.com/support.htm or send a request to support@femtools.com.

 

June 2014 - See FEMtools at the ISMA2014 Conference in Leuven

Dynamic Design Solutions will show FEMtools 3.7 at the 2014 International Conference on Noise and Vibration Engineering (ISMA2014) that is held from September 15-17, 2014 in Leuven, Belgium.

It is the 26th international conference in a series of annual courses and biennial conferences on structural dynamics, modal analysis and noise and vibration engineering, organised by the Department of Mechanical Engineering of the KU Leuven. The conference provides a forum for engineers, researchers and other professionals active in the field of modelling, analysing, testing and improving the noise and vibration characteristics of mechanical systems and civil structures.

Please come and visit us at booth #10 in the exhibition area to check out the newest release of FEMtools discussing your dynamics simulation, modal pretest planning, test-analysis correlation and FE model updating needs.

For more information about this event: https://www.isma-isaac.be.

 

February 2014 - FEMtools 3.7.1 Maintenance Release

Dynamic Design Solutions announces the release of FEMtools 3.7.1.

FEMtools 3.7.1 is a maintenance release that provides bug corrections and various enhancements to the framework, data interface programs, user interface, analysis modules, commands and API functions.

The following is a sample of new features and enhancements in this release:

  • The user interface now supports ultra-high resolution screens. The size of user interface items like toolbar icons is now scalable.
  • Dynamic rotation, zooming and panning can now be performed using one-finger and two-finger gestures on touch-enabled screens.
  • A new and very fast direct reader for the ABAQUS ODB file format is added.
  • It is now possible to exchange sets of nodes and elements with ANSYS.
  • Enhanced support for Universal Files that contain FRFs with undefined type.
  • The FEMtools eigenmodes solver now supports banded analysis for reduced memory requirements.
  • Various improvements are made to the dynamic substructuring methods (superelements, MBA, FBA).
  • Various improvements to Mode Participation Analysis (MPA) and automated sensor selection in Pretest Analysis.

FEMtools 3.7.1 is available as a free upgrade for all customers with current maintenance and technical support contract. License files for FEMtools 3.7.0 remain valid for v3.7.1.

Customers with current support and maintenance can find more information on this release and how to download the installation packs in the FEMtools Support site.  A login name and password is required to access the support pages. If you have a current Maintenance and Support contract and did not yet receive a login name and password, then register at http://www.femtools.com/support.htm or send a request to support@femtools.com.

 

January 2014 - Happy New Year and Celebrating 20 Years Specializing in Finite Element Model Updating!

A Happy New Year from the FEMtools team at Dynamic Design Solutions!  2013 has been a great year for us and we look forward to bringing you more innovation and value in 2014.

This year, Dynamic Design Solutions is celebrating its 20 years in business. Thanks to our customers, partners and friends we have been able to steadily grow our company and become the reference in the field of finite element model validation and updating for structural static and dynamic analysis.

Today we are proud to count numerous prestigious and international companies that are market leaders in the automotive, aerospace and power industries among our customers. Our FEMtools software has also become an important tool for engineering students at academic institutions worldwide.

Verification and Validation (V&V), complemented by Model Updating has become a standard tool for all CAE engineers. Dynamic Design Solutions is ready to serve your needs and offer expert assistance during the years to come.

 

December 2013 - See FEMtools at the IMAC XXXII Conference in Florida

Dynamic Design Solutions will show FEMtools 3.7 at the 32th International Modal Analysis Conference  (IMAC XXXII) that is held from February 3 to 6, 2014 in Orlando, Florida.

IMAC is an international conference and exposition on structural dynamics. The theme of the conference this year is Dynamics of Coupled Structures. Please come and visit us at booth #104 in the exhibit area to check out our newest tools for dynamic substructuring and hybrid modelling that are included in FEMtools Dynamics.  We also look forward to discussing your modal pretest planning, test-analysis correlation and FE model updating needs.

For more information about this event: www.sem.org.

 

November 2013 - METU WIND Chooses FEMtools 

Researchers from the Center for Wind Energy at Middle East Technical University (METU WIND) in Ankara, Turkey have chosen FEMtools Model Updating to validate and update ANSYS finite element models of wind turbine components using results from modal testing.

METU WIND is a university research center established in 2011 with the vocation of becoming a focal point at the national and international level by performing fundamental and applied research in the field of wind energy. Main areas of research include rotor blade aerodynamics, integrated design of wind turbine systems, wind farm design, energy storage, composites and material characterization. FEMtools will be used at the Structural Dynamics Laboratory, which is the main test and analysis facility of METU WIND for characterizing the vibration and structural dynamic behavior of aerospace, mechanical and civil engineering structures.

 

October 2013 - New FEMtools Solutions Partners in Romania and Malaysia

Dynamic Design Solutions announces that it has appointed new FEMtools Solutions Partners in Romania and Malaysia:

INICAD is an engineering and software distribution and consulting company serving the Romanian market. Their activities span the fields of civil engineering, mechanical engineering and biomedical engineering.

http://www.inicad.ro

Invicom Test & Measurement provides test instruments, data acquisition systems, sensors and CAE solutions in Malaysia, Indonesia, Thailand & Singapore.  They provide turnkey solutions to quantify, measure and process the measured data to obtain values that help to understand the real physics of the system, be it for finding fault, confirmation of simulation, improvement or as baseline parameters. Key customers are Automotive R&D departments, Civil & Structural Monitoring agencies, Aviation & Aerospace, HVAC manufacturers, Rolling Stock Manufacturers, Power Distribution/Production Facilities, Petroleum Process Plants (Offshore & Onshore), Consumer Products Manufacturers and Research Universities.

http://www.invicom.com

 

September 2013 - FEMtools 3.7 for Mac OS X Released

Dynamic Design Solutions has completed the FEMtools 3.7 release with a version for Mac OS X. The installation package is available from September 17, 2013.

FEMtools 3.7 for Mac OS X requires Mac OS X 10.7+ on Intel 64-bit architecture. Information on system requirements can be found here. The release includes all new features and changes that were previously introduced with the version for Windows and Linux OS. The FEMtools GUI is identical on all supported OS.

At the same time, DDS released a new maintenance build of FEMtools 3.7 for Windows and Linux, and a patch installation package that upgrades the previously released version to the latest version. 

More information on these releases and how to download the installation packs is in the FEMtools Support site.  A login name and password is required to access the support pages. If you have a current Maintenance and Support contract and did not yet receive a login name and password, then register at http://www.femtools.com/support.htm or send a request to licensing@femtools.com.

 

September 2013 - DDS Releases FEMtools 3.7

Dynamic Design Solutions announces the release of FEMtools 3.7. The new version is available for download from September 2.

FEMtools 3.7 is a major revision of the FEMtools software suite that introduces new dynamic analysis and substructuring features (dynamic compensation, modal-based assembly), as well as improvements to FRF-based assembly, pretest analysis, correlation analysis and model updating. There are also various improvements and extensions to the interface programs, commands and API functions.

The highlights of this new release are summarized hereafter:

  • Computation of Frequency Response Functions (FRFs) is improved in the following ways:
    • The modal method can now be enhanced by using the Dynamic Compensation method.
    • The Padé Method for direct FRF computation now includes automatic convergence control.
    • Direct FRF computation now supports features like multi-reference enforced displacements and local coordinate systems.
  • Modal-Based Assembly (MBA) is added as a new dynamic substructuring method that can predict the impact of a modification on the dynamic properties of a structure. The MBA implementation in FEMtools 3.7 supports FEA data, test data or a combination of FEA and test data (hybrid modeling). MBA is an extension of Structural Dynamics Modification (SDM) and replaces the SDM tool that was included in previous FEMtools versions.
  • FRF-Based Assembly (FBA) was introduced in a previous release but is further extended in FEMtools 3.7. FBA loads and responses are introduced which enable the FBA module to perform Transfer Path Analysis (TPA). FBA now also supports multi-point constraints, computation of the internal forces in the FBA connection points and the use of enforced displacements. Additional examples that illustrate the applications of FBA have been added.
  • Pretest analysis now uses uniform GUI panels that offer the same level of integration and functionality for all sensor selection methods. This includes the possibility to use fixed sensor locations, and preview of the candidate locations based on minimal sensor selection among other new features.
  • Correlation analysis introduces a new spatial correlation algorithm for processing large data sets like the point clouds obtained with non-contact sensors (laser scanning vibrometers). Directional node-point pairing and multi-step node-point pairing are added. Mode shape pairing can now be based on POC and mode pairing for axisymmetric structures has been improved.
  • Model updating can now use a new method for automatically improving the condition of the Bayesian updating equations. This results in a more robust updating process for cases with a high number of updating parameters or updating responses. FEMtools 3.7 also offers additional flexibility for rejecting updating results. Several improvements have been made to text-based parameter updating and multi-model updating. Generic responses can now be used for a more flexible approach to model updating in case of non-standard responses.
  • Extended scripting functionality is offered through 27 new commands to be used in command scripts. FEMtools Script programmers will benefit from new utility and FEMtools API functions.
  • The FEMtools database and project files (fdb, fpj) are now saved in compressed format resulting in smaller data files.
  • The principle FE data interfaces and solver drivers (Abaqus, Ansys and Nastran) have been upgraded. For example, the Abaqus and Ansys interfaces now support importing FRF data, and the Nastran driver can now pilot the MSC.Nastran ACMS solver.
  • The flexibility of the Universal File Format interface has been improved and settings can now be controlled with a settings dialog box.
  • The Polytec file interface has been rewritten to improve performance and robustness.

FEMtools 3.7 is available on Windows and Linux as a free upgrade for all customers with current maintenance and technical support contract. Availability of the version for Mac OS X will follow at a later time and will be announced at this location.

More information on this release and how to download the installation packs is in the FEMtools Support site.  A login name and password is required to access the support pages. If you have a current Maintenance and Support contract and did not yet receive a login name and password, then register at http://www.femtools.com/support.htm or send a request to licensing@femtools.com.

Time-locked license files (annual) for FEMtools 3.4-3.6 remain valid for v3.7.
License files without expiration date issued for a previous version are not compatible with FEMtools 3.7 and will need to be replaced.

 

May 2013 - New IOMAC Technical Paper Available for Download

A technical paper that was presented at the International Operational Modal Analysis Conference (IOMAC 2013) that was held from May 13-15 in Guimaraes, Portugal, is now available for download from the FEMtools website:

E. Dascotte, J. Strobbe, U. Tygesen, Continuous Stress Monitoring of Large Structures.  Presented at the 5th International Operational Modal Analysis Conference (IOMAC), May 2013, Guimaraes, Portugal.
Download (PDF, 1.2 MB)

Dynamic Design Solutions contributed to the IOMAC pre-conference courses by making a license of FEMtools available to the PhD students that participated. Each student had to complete a project that consisted of an operational modal test, finite element modelling, test-analysis correlation and FE model updating.

 

March 2013 - IMAC Display of Shaking Race Car

California-based FEMtools distributor NAVCON did some "shakin" of a Porsche 911 race car at the 31st annual International Modal Analysis Conference (IMAC) that was held last February in Anaheim, Los Angeles. 

The car was instrumented with PCB transducers and excited using a long stroke APS Dynamics shaker. Frequency response measurements were made in the exposition area using a Data Physics Mobilyzer. The data was used for modal parameter extraction and subsequent finite element model validation.

IMAC 32 Race Car Display

The 911 with FEMtools logo set on custom built "raceramp" wheel stands. The shaker is visible behind the left rear wheel.

 

See also the News Archives and Tech Tips.

 

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