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Structural Response Analysis under Dependent Variables Based on Probability Boxes

机译:基于概率框的因变量下的结构响应分析

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This paper considers structural response analysis when structural uncertainty parameters distribution cannot be specified precisely due to lack of information and there are complex dependencies in the variables. Uncertainties in parameter are quantified by probability boxes (p-boxes) and dependence among uncertain parameters is modeled by copula. To calculate uncertainty structural response, a sampling-based method is proposed. In this method, a sampling strategy is used to sample random intervals from dependent p-boxes according to the copula theory and the metamodel-based optimization method is applied to solve a range of structural interval response problems. Two types of errors are presented to evaluate the error of different p-boxes. Four numerical examples are investigated to demonstrate the effectiveness of the present method.
机译:当由于信息不足而无法精确指定结构不确定性参数分布并且变量具有复杂依赖性时,本文考虑了结构响应分析。参数的不确定性通过概率框(p-box)进行量化,不确定参数之间的依赖性通过copula建模。为了计算不确定性结构响应,提出了一种基于采样的方法。在这种方法中,采用抽样策略根据copula理论从相关的p盒中抽样随机区间,并采用基于元模型的优化方法来解决一系列结构区间响应问题。提出了两种类型的误差,以评估不同p盒的误差。研究了四个数值示例,以证明本方法的有效性。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第16期|484615.1-484615.11|共11页
  • 作者

    Xiao Z.; Yang G.;

  • 作者单位

    Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Coll Mech & Vehicle Engn, Changsha 410082, Hunan, Peoples R China.;

    Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Coll Mech & Vehicle Engn, Changsha 410082, Hunan, Peoples R China.;

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