Editor’s note: A special thank you to the Terrafugia Engineering Team for compiling today’s blog post.
From conceptual design to manufacturing, we use simulation tools such as ANSYS® Mechanical™ and ANSYS Composite Prep-Post™ to significantly reduce development time and costs. Our senior engineers, Mark Corriere and Nicholas Tucker, have been leading the analysis and simulation charge on the Terrafugia Transition® and have used this iterative process to increase confidence in the physical structure.
Terrafugia Transition – example of a frontal load case analysis
This is a highly visible topic that we’ve found a lot of people are interested in learning more about, so we’ve teamed up with ANSYS for a webinar at 1pm ET, this Thursday, March 6th, to discuss the technical challenges and design process of developing the Terrafugia Transition®, the premier flying car. The Transition® addresses the limitations of typical general aviation aircraft by extending the multi-purpose flexibility of its driving capability. Continue reading
Our Tech Tips for reliable turbomachinery blade development looks a little different this month because (unbeknownst to me) our IT department is moving some equipment this weekend, and well, I didn’t want you to miss out, so we’re cross-publishing this one on turbomachinery here on the blog!
Turbomachinery Blade Development with Aero-Mechanical Simulation
Engineers need advanced simulation tools to enable them to meet customer demands for more-efficient and reliable high-performance machines. Engineers must accurately predict aerodynamic performance across an increasingly wide range of speeds and operating conditions, and they also must guarantee reliability in the design. For example, they need to ensure that blade vibration will be damped across the operating range and that cyclic unsteady loading will not impact design life. Continue reading
ANSYS 15.0 contains a number of amazing achievements in the area of high performance computing (HPC) for the Mechanical APDL product. The performance is up to 5 times faster than previous releases, especially at higher core counts, by means of improved domain decomposition algorithms.
In addition, new parallel functionality was added in this release. One of the most important new features was the subspace eigensolver for vibration analyses, which supports distributed memory parallel and can be several times faster than the widely used block Lanczos eigensolver. Continue reading
Developers rarely have the luxury of pausing to look back. Still, it is a good and necessary exercise to take some time to assess the relevance of a particular release amid the hustle and bustle of new development, release activities, and planning.
Fortunately, most ANSYS partners have a close relationship with the user base, and we can count on many of them to gauge customer reaction to a given release. Recently, I came across our colleague and channel partner Eric Miller’s blog on ANSYS Mechanical 15.0. Eric chose ten of what he considers to be the “coolest” features in both ANSYS Mechanical and ANSYS Mechanical APDL.
In his concluding thoughts, Eric wrote, “The hard part for me in writing this posting was picking the top 10.” We agree! If Eric’s comments have heightened your curiosity, I have identified five great additional features of ANSYS Mechanical APDL R15 to complement his list. Continue reading
One of my personal “wishlist” items was that our ANSYS Mechanical software make better use of the full potential of my 12-core PC workstation, like our solvers do with HPC. With ANSYS 15.0, my wish has been granted — part meshing in ANSYS Mechanical is now parallel! By and large meshing occurs independently on each part, thus it is a perfect candidate for massive parallel speedups.
When the meshing team told me they were planning on supporting parallel part meshing, I was more than willing to throw my customer inspired models at it. First, I tried it out on a model near the 100 part mark and quite simply I was amazed. I actually didn’t believe the performance that I was witnessing so I tried more models — the speedups in ANSYS 15.0 over ANSYS 14.5 were often 10x faster and some more than 20x faster! Continue reading
Stress in a bladed disk
Turbomachinery — turbochargers, compressors, jet engines, gas turbines, pumps, etc.— are subjected to some of the harshest environments for an engineered product. High rotational velocities and extreme temperatures and pressures produce high static stresses. Couple on top of that the vibrations encountered due to the fluctuating and turbulent flow field, rotating turbomachinery components are primed for high-cycle fatigue (HCF) failures.
Traditionally, cyclic modal analyses are used to extract the vibrational modes and the appropriate modes from Campbell and interference diagram assessments are scaled based on past test data to arrive at estimates of the vibratory stresses for a fatigue analysis. Continue reading
A threaded bolt connection is used to hold two or more parts together to form an assembly of a mechanical structure. In order to achieve expected physical behaviors of a threaded bolt connection, a detailed three-dimensional bolt model, which fully includes the effect of the true thread geometry and the frictional behavior at contact interfaces is sometimes desirable. In such a case, geometrically modeling the thread will lead to a high number of elements in order to accurately capture stresses, also meaning unaccepted computational cost.
ANSYS Mechanical 15.0 introduces a new bolt thread modeling technique via the contact elements, which eliminates the need for a detailed mesh discretization of the threads. The computation of the thread occurs by internally modifying the contact region to match the thread’s geometry. This feature offers simplified modeling with the near accuracy of a true threaded-bolt model. The computation time for getting stresses in the thread area is then reduced by a factor of 10 compared to the true threaded-bolt model. Continue reading
In my last blog, I highlighted that HBM nCode is the world-wide leading developer of CAE durability software. They develop HBM nCode DesignLife, which is the leading FE based fatigue analysis software product. I discussed how ANSYS, Inc and HBM nCode partnered to develop the ANSYS, Inc supported ANSYS nCode DesignLife product. Thus, two variations of DesignLife are now available to ANSYS customers — HBM nCode DesignLife and ANSYS nCode DesignLife. Both versions have identical core capabilities, so what’s the difference between ANSYS nCode DesignLife vs. HBM nCode DesignLife?
The answer is Workbench!
HBM nCode DesignLife is a standalone product that is a good solution for a wide range of CAE tools. ANSYS nCode DesignLife is data integrated into the Workbench environment enabling it to provide state-of-the-art CAE fatigue analysis capabilities along with the ease of use features of the Workbench environment. This integration highly optimizes the workflow for ANSYS users. Some of the benefits of this Workbench integration are: Continue reading