Challenges of order reduction techniques for problems involving polymorphic uncertainty
Challenges of order reduction techniques for problems involving polymorphic uncertainty
复制标题
涉及多态不确定性问题的降阶技术的挑战
DOI:
10.1002/gamm.201900011
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
M. Eigel
中科院分区:
文献类型:
--
作者:
D. Pivovarov;K. Willner;S. Steinmann;S. Brumme;M. Müller;T. Srisupattarawanit;G.-P. Ostermeyer;C. Henning;T. Ricken;S. Kastian;S. Reese;D. Moser;L. Grasedyck;J. Biehler;M. Pfaller;W. Wall;T. Kohlsche;O. v. Estorff;R. Gruhlke;M. Eigel
Modeling of mechanical systems with uncertainties is extremely challenging and requires a careful analysis of a huge amount of data. Both, probabilistic modeling and nonprobabilistic modeling require either an extremely large ensemble of samples or the introduction of additional dimensions to the problem, thus, resulting also in an enormous computational cost growth. No matter whether the Monte‐Carlo sampling or Smolyak's sparse grids are used, which may theoretically overcome the curse of dimensionality, the system evaluation must be performed at least hundreds of times. This becomes possible only by using reduced order modeling and surrogate modeling. Moreover, special approximation techniques are needed to analyze the input data and to produce a parametric model of the system's uncertainties. In this paper, we describe the main challenges of approximation of uncertain data, order reduction, and surrogate modeling specifically for problems involving polymorphic uncertainty. Thereby some examples are presented to illustrate the challenges and solution methods.
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