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Non-parametric-parametric model for random uncertainties in non-linear structural dynamics: Application to earthquake engineering

机译:非线性随机动力学不确定性的非参数参数模型:在地震工程中的应用

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This paper deals with the transient response of a non-linear dynamical system with random uncertainties. The non-parametric probabilistic model of random uncertainties recently published and extended to nonlinear dynamical system analysis is used in order to model random uncertainties related to the linear part of the finite element model. The non-linearities are due to restoring forces whose parameters are uncertain and are modeled by the parametric approach. Jayne's maximum entropy principle with the constraints defined by the available information allows the probabilistic model of such random variables to be constructed. Therefore, a non-parametric-parametric formulation is developed in order to model all the sources of uncertainties in such a non-linear dynamical system. Finally, a numerical application for earthquake engineering analysis is proposed concerning a reactor cooling system under seismic loads.
机译:本文研究具有随机不确定性的非线性动力系统的瞬态响应。为了对与有限元模型的线性部分相关的随机不确定性进行建模,使用了最近发布并扩展到非线性动力学系统分析的随机不确定性的非参数概率模型。非线性归因于恢复力,恢复力的参数不确定,并通过参数方法进行建模。 Jayne的最大熵原理具有由可用信息定义的约束条件,可以构造这种随机变量的概率模型。因此,开发了非参数参数公式,以便对这种非线性动力系统中的所有不确定性源进行建模。最后,提出了地震作用下反应堆冷却系统在地震工程分析中的数值应用。

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