Can LS-DYNA Scale Any Higher?

Processing and memory bottlenecks can run but they can’t hide. Not indefinitely, at least. And especially not when four technology leaders combine efforts against them. Cray, Livermore Software Technology Corporation (LSTC), the National Center for Supercomputing Applications (NCSA) and Rolls-Royce are partnering on an ongoing project to explore the future of implicit finite element analyses of large-scale models using LS-DYNA, a multiphysics simulation software package, and Cray supercomputing technology. As the scale of finite element models — and the systems they run on — increase, so do scaling issues and the amount of time it takes to run a model. Understanding that, ultimately, only time and resource constraints limit the size ... [ Read More ]

Cray System Helps Cut Jet Fuel Burn by 15 Percent

Consider the engine power required to get a plane off the ground. And then consider the engineering that goes into it. Brian Mitchell does. Every day. The senior principal engineer at GE Global Research leads the development of GE’s in-house computational fluid dynamics (CFD) code. Engineers utilize CFD to design better compressor blades, fan blades, turbine blades — all the stuff of the modern jet engine. “What we do is write the software that GE Aviation uses to simulate the air flow in jet engines,” says Dr. Mitchell. In fact, engine design, CFD — and the powerful computers to process it all — have a strongly symbiotic relationship. Market demand for more fuel-efficient engines requires more creative designs. Those designs ... [ Read More ]

Expanding the Envelope for LS-DYNA Blade Off Simulations

When a fan or compressor blade fails in an airplane jet engine, it’s a potentially deadly event. Failed blades release high-energy fragments that can perforate the engine case, damage fuel tanks and cause catastrophic failures. Because of this extreme danger, the Federal Aviation Administration requires that engine cases be capable of containing blade fragments. In turn, it makes “fan blade off containment” a critical design requirement for the aerospace industry. Of course, improving fan blade off containment simulation also makes for a compute challenge for users of Cray® XC™ supercomputer and the finite element application LS-DYNA®. So a team from Cray and Livermore Software Technology Corporation (LSTC) got together recently ... [ Read More ]

DataWarp I/O Accelerator Boosts MSC Nastran Simulations

MSC Nastran is a widely used structural analysis applications, especially for large modal analysis (i.e., eigenvalue) simulations. It requires a high-capability I/O system for good throughput performance. However, good I/O performance on a cluster architecture can be a challenge, since clusters are often configured to maximize compute scalability and have relatively weak I/O capability per node. To address this challenge, Cray introduced the Cray® DataWarp™ I/O acceleration capability, offered in Cray® XC40™ supercomputers. The DataWarp applications I/O accelerator leverages features of the Cray Linux® environment, solid-state storage (SSD) and the Cray high-speed network to enable high-performance I/O at every node in the system without ... [ Read More ]

Improving Your Vehicle Experience with Advanced Simulation

Aerodynamics are key attributes in new cars. Airflow over a vehicle is critical to gas mileage, can produce annoying wind “buffeting “and affects the vehicle’s quality and success in the market in many other ways. As with all other design features, auto companies want to use HPC simulations to predict aerodynamic performance. However, most automobile designs are not particularly aerodynamic, so airflow is very complicated and difficult to simulate accurately. Cray and ANSYS recently published an application brief on an aeroacoustics (wind noise) simulation on an Alfa Romeo Giulietta automobile. It’s a very interesting example for many reasons, including: It demonstrated the technical partnership between Cray and ANSYS. It was a ... [ Read More ]