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Use of stochastic finite element method for sensitivity analysis

机译:随机有限元法在灵敏度分析中的应用

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Sensitivity analysis may be used, in the context of soil mechanics, to find the contribution of each system component to the total stiffness of the structure. This paper introduces an alternative approach using the stochastic finite element method (SFEM). Through this method, the variations in input and output variables are utilized to define a factor referred to as contribution ratio. It is shown that the contribution ratio is a measure of the sensitivity of the displacement response of a system to the uncertainties in its material properties. The method is applied to a pile foundation as well as to a spread footing problem to determine the sensitivity of the foundation response to the uncertainties associated with the elastic modulus of each soil layer.
机译:在土壤力学的背景下,可以使用敏感性分析来找出每个系统组件对结构总刚度的贡献。本文介绍了一种使用随机有限元方法(SFEM)的替代方法。通过这种方法,输入和输出变量的变化可用于定义一个因素,称为贡献率。结果表明,贡献率是对系统位移响应对其材料特性不确定性的敏感性的度量。该方法不仅适用于桩基础,而且适用于基础问题,以确定基础对与每个土层弹性模量相关的不确定性的响应的敏感性。

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