Two New LS-DYNA Case Studies: 16g Sled Test, Blast Analysis

It's been a busy year for Predictive Engineering. We'll take our secret projects to the grave, but we're excited to share two recent analysis projects utilizing LS-DYNA. See step-by-step figures of the process along with video examples and PDF download.

16g Sled Test Analysis of Lavatory Wall with Attendant's Seat

In this LS-DYNA FEA consulting services work, the objective was to limit the design and schedule exposure of a new design. One can think of this as FEA insurance; that is, it is must less expensive and faster to virtually test than to destroy prototypes on a 16g sled test. Experimentally, a 50% percentile dummy or anthropomorphic test device (ATD) is strapped into the chair and then subjected to a 16g acceleration pulse with a half-sine pulse width of 0.18 second.  The test procedure is well defined under 14 CFR Part 25.562, Amendment 25-64 and JAR Part 25.562 with guidance given under SAE AS8049 Rev. A and for the ATD under 49 CFR 572. READ MORE

Blast Analysis of Large Generator Housing

Large, skid mounted, mobile generators are quite common to supply emergency back-up power at military bases or in remote locations where the local power grid may be unstable. The power output of these generators can range from hundreds of kW up 3 MW. The systems are designed to be completely self-contained with the fuel tank as its base. In some environments, the generator housings are required to withstand blast loadings due to the detonation of ground or airborne explosives. To avoid the cost of testing a complete generator set, procedures allow for the virtual simulation of the blast event using LS-DYNA. The blast intensity can be estimated using ConWep. READ MORE

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