News, Blogs and Updates

ASME Section VIII, Division 2 "Design-by-Analysis" Pressure Vessel Consulting Services

We just finished two FEA consulting projects under ASME Section VIII, Div. 2 "Design-by-Analysis" code and they couldn't be more different. One was for the transport of electronic equipment within a gas line or a "pipe pig" and the other was a large high-temperature reactor using for the scrubbing of organic laden gases. The only commonality between the projects was that they had to pass the ASME pressure vessel code and our clients wanted their designs to be as efficient as possible. That is the beauty of ASME's design-by-analysis rules is that one only has to show that the structure meets their stress allowable within a broad list of available materials (Part D) or one can base the allowable on the material's ultimate strength. This flexibility allows one to leverage the full power of a finite element analysis to maximize the design of the structure. In the pipe pig analysis, we were able to cut weight out of the head and to allow our client to use a less costly, non-stainless steel material, In the 9.5m diameter reactor we optimized the manufacturing process to join the roof to the shell and performed a buckling analysis. Both projects saved our clients money in materials and construction costs and increased their confidence that they had the best approach going forward.

ASME Section VIII, Division 2 Design by Analysis FEA Consulting Projects on Instrumented Gas Pipeline Pig and RTO Vessel

Femap and LS-DYNA: Rocket Science Made Easy

This presentation was made at last year's Femap Symposium in Atlanta but it is very relevant to anyone interested in learning about how Femap works with LS-DYNA. The presentation is titled: Femap and LS-DYNA: Rocket Science Made Easy  If you would like to see the videos used in this presentation, click on the graphic below and it'll take you to our YouTube video. The next Symposium for us, will be in Seattle. If you would like to register for this Femap and NX Nastran Symposium, just click on the prior highlighted text. We plan on having Mark Sherman out from the Femap Development Team and the usual host of characters to present hard-core technical information on how you can grow and leverage your Femap and NX Nastran skills. Plus, it should be some killer networking and we'll have a no-host bar at the end of the day.

Femap and LS-DYNA Rocket Science Made Easy - A presentation by Predictive Engineering LS-DYNA Consulting

Crash and Drop Simulation of Jet Engine Stand

It's nice to know that shipping fixtures have to meet stringent targets for crash, drop and static loading. It would be sort of scary to think of a 3200 kg jet engine breaking lose from its shipping fixture during a 9g crash event and slamming through the bulkhead of a jet liner and into the cockpit. Jet engine stands also have to handle abuse loading due to drops or smashing into walls at 2g loading. Finally, since the complete assembly is often transported over roads, its first natural freqencey needs to be above 10Hz. Historically, these requirements were met by testing and fixture weight was of secondary concern. As we all know, if something is flying, then extra weight is lost revenue. This FEA consulting project took the client's CAD geometry and idealized it down to FEA model that could quickly run implicitly and explicitly using LS-DYNA. The results correlated nicely with the experimental results and indicated that the stand was beautifully designed with little margin left on the table.

 

FEA of Jet Engine Transport Stand - LS-DYNA Nonlinear Consulting Services

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