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A Computational Approach for Probabilistic Analysis of Ls-Dyna Water Impact Simulations (Paperback)
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A Computational Approach for Probabilistic Analysis of Ls-Dyna Water Impact Simulations (Paperback)
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List price R390
Loot Price R319
Discovery Miles 3 190
You Save R71 (18%)
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NASA s development of new concepts for the Crew Exploration Vehicle
Orion presents many similar challenges to those worked in the
sixties during the Apollo program. However, with improved modeling
capabilities, new challenges arise. For example, the use of the
commercial code LS-DYNA, although widely used and accepted in the
technical community, often involves high-dimensional, time
consuming, and computationally intensive simulations. Because of
the computational cost, these tools are often used to evaluate
specific conditions and rarely used for statistical analysis. The
challenge is to capture what is learned from a limited number of
LS-DYNA simulations to develop models that allow users to conduct
interpolation of solutions at a fraction of the computational time.
For this problem, response surface models are used to predict the
system time responses to a water landing as a function of capsule
speed, direction, attitude, water speed, and water direction.
Furthermore, these models can also be used to ascertain the
adequacy of the design in terms of probability measures. This paper
presents a description of the LS-DYNA model, a brief summary of the
response surface techniques, the analysis of variance approach used
in the sensitivity studies, equations used to estimate impact
parameters, results showing conditions that might cause injuries,
and concluding remarks.
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